Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on February 2, 1993.
As of Wednesday, December 12th, 2018 this Executive Order has not been overturned or superceeded.

Approved Parts

Models
1982-1987 Chevrolet Camaro originally equipped with an LG4 or L69 5.0L engine and a 700R4 automatic transmission

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-278
  • Executive Order 278 / D278
  • ARB # D-278
  • Executive Order No: D-278
  • C.A.R.B. No. D-278
  • Resolution D-278
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-278 PDF

D-278 Document:



                                                         (Page 1 of 2)

                               State of California
                               AIR RESOURCES BOARD

                              EXECUTIVE ORDER D—278
                    Relating to Exemptions Under Section 27156
                               of the Vehicle Code

                                   CHEVROLET RACESHOP
                       5.7L H.O.    CAMARO PERFORMANCE PACKAG

Pursuant to the authority vested in the Air Resources Soard by section 27156
of the Vehicle Code; and

Pursuant to the authority vested in the undersigned by Sections 39515 and
39516 of the Health and Safety Code and Executive Order G—45—5;

IT IS ORDERED AND RESOLVED:  That the installation of the 5.7L H.0. Camaro
Performance Package manufactured by the Chevrolet Raceshop of 30007 Van Dyke
Avenue,   Warren,   Michigan 48090—9065 has been found ncet to reduce the
effectiveness of the applicable vehicle pollution control system and,
therefore, is exempt—from the prohibitions of Section 27156 of the Vehicle
Code for 1982 to 1987 Camaros originally equipped wit" an LG4 or L69 5.0L
engine and a 700R4 automatic transmission.

The Chevrolet Raceshop‘s S.?L H.0. Camaro Performance Package includes an
engine block,   camshaft,   pistons,   cylindér heads,    intsxs   and exhaust
manifolds, an electronic control unit (ECU) with rec   brated PROM, new
fuel, oil and water pumps, oil pan, valve covers, dual—snorkel air cleaner,
dual catalyst, and a transmission shift kit.  The Raceshop‘s 5.7L H.O.
Camaro Performance Package does not utilize the use of an EGR valve or the
carburetor heat stove.

This Executive Order is valid provided that installation instructions for
the 5.7L H.O. Camaro Performance Package will not recommend tuning the
vehicle to specifications different from those submitzed by the Chevrolet
Raceshop.

Changes made to the design or operating conditions of the 5.7L H.0. Camaro
Performance Package, as exempt by the Air Resources   ard, which adversely
affect the performance of a vehicle‘s pollution contr:l system shall
invalidate this Executive Order.

Marketing of these 5.7L H.O. Camaro Performance Package using any
identification other than that shown in this Executive Order or marketing of
these 5.7L H.O. Camaro Performance Package for an application other than
those listed in this Executive Order shall be prohibited unless prior
approval is obtained from the Air Resources Board.

This Executive Order does not constitute any opinion as to the effect the
use of the Performance Package may have on any warranty either expressed or
implied by the vehicle manufacturer.


CHEVROLET RACESHOP                                       EXECULIVE ORDER D—278
                                                         (Page 2 of 2)




THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION,
APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESOURCES BOARD OF
CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENZFITS OR ANY ALLEGED
BENEFITS OF CHEVROLET RACESHOP‘S 5.71 H.O. CAMARO PERFORMANCE PACKAGE.

No claim of any kind, such as "Approved by the Air Resources Board" may be
made with respect to the action taken hereln in any advertising or other
oral or written communication.

Violation of any of the above conditions shall be grcunds for revocation of
this order.  The order may be revoked only after ten day written notice of
intention to revoke the order, in which period the hclder of the order may
request in writing a hearing to contest the proposed revocation.  If a
hearing is requested, it shall be held within ten days of receipt of the
request and the order may not be revoked until a determination after hearing
that grounds for revocation exist.                   :

Executed at El Monte,   California,   this d;l   a        of February, 1993.




                                              Summerfield
                                              ant Divisicn Chief
                                        Mobile Source Division


                           State of California
                           AIR RESOURCES BOARD




                     EVALUATION OF CHEVROLET RACESHOP‘S
5.7L H.O. CAMARO PERFORMANCE PACKAGE FOR EXEMPTION FROM THE PROHIBITIONS OF
VEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF THE
                       CALIFORNIA CODE OF REGULATIONS




                              February 1993




                                                                    tw


                            State of California
                            AIR RESOURCES BOARD




                     EVALUATION OF CHEVROLET RACESHOP‘S
5.7L H.O. CAMARO PERFORMANCE PACKAGE FOR EXEMPTION FROM THE PROHIBITIONS OF
VEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF THE
                       CALIFORNIA CODE OF REGULATIONS




                                     by

                           Mobile Source Division
                            State of California
                            Air Resources Board
                            9528 Telstar Avenue
                          El Monte, CA  91731—2990




(This report has been reviewed by the staff of the California Air Resources
Board and approved for publication.  Approval does not signify that the
contents necessarily reflect the views and policies of the Air Resources
Board, nor does mention of trade names or commercial products constitute
endorsement or recommendation for use.)


                                      SUMMARY




        Chevrolet Raceshop (Raceshop)    of 30007 Van Dyke Ave., Warren ,   Michigan

48090—9065,    has applied for an exemption from the prohibitions in Section 27156

of the California Vehicle Code (VC)}    for the 5.7L H.O. Camaro Performance

'Package.   The Performance Package is designed for installation on 1982—1987

Camaros originally equipped with an LG4 or L69 5.0L engine and a 700R4

automatic transmission.           A

        The Raceshop submitted a completed application and all other required

information,    as well as emissions test data performed at Automotive Testing and

Development Services (ATDS) in §untington Beach, California which shows that

their Performance Paékage does not have any adverse effect on emissions.

Confirmatory testing berformed by the Air Resources Board (ARB) showed similar

results.

        Based on the submitted information, the‘staff concludes that the

Raceshop‘s Performance Package will not adversely affect exhaust emissions from

vehicles for which an exemption is requested.

        The staff recommends that the Chevrolet Raceshop be granted an exemption

as requested and that Executive Order D—278 be issued.


                                 TABLE OF_CONTENTS




                                                     Page Number




SUMMARY

CONTENTS                                                  ii

'I —      INTRODUCTION                                     1

II.       CONCLUSION                                       1

III.   RECOMMENDATION                   *      *           1

IV.    PERFORMANCE PACKAGE DESCRIPTION                    2

v.     DISCUSSION OF THE PERFORMANCE PACKAGE              3

       APPENDIX A                                         5

            Parts List

       APPENDIX B                                         7

            Installation Instructions




                                        i1


                           EVALUATION OF CHEVROLET RACESHOP‘S
     5.7L H.O.   CAMARO PERFORMANCE PACKAGE FOR EXEMPTION FROM THE PROHIBITIONS OF
     VEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222,   TITLE 13,   OF THE
                              CALIFORNIA CODE OF REGULATIONS



I.        INTRODUCTION

          Chevrolet Raceshop (Raceshop) of 30007 Van Dyke Ave., Warren , Michigan

48090—9065,      has applied for an exemption from the prohibitions in Secpion 27156

of the California Vehicle Code (VC)      for their 5.7L H.O. Camaro Performance

Package.     The Performance Package is designed for installation on 1982—1987

Camaros originally equipped with an LG4 or L69 5.0L engine and a 700R4

automatic transmission.

          The Raceshop submitted a completed application and other required

information, és well as emissions test data performed at Automotive Testing and

Development Services (ATDS)      in Huntington Beach, California which shows that

their Performance Package does not have any adverse effect on emissions.

Testing performed by the Air Resources Board (ARB) showed similar results.

II.      CONCLUSIONS

          Based on the submitted information, the.staff concludes that the

Raceshop‘s Performance Package will not adversely affect exhaust emissions from

vehicles for which an exemption is requested.

III.     RECOMMENDATION

          The staff recommends thfit the Chevrolet Raceshop be granted an exemption

for their 5.7L H.0. Camaro Performance Package for installation on 1982—1987

Camaros equipped with a 5.0L V8 engine.       The staff also recommends that

Executive Order D—278 be issued.


IV.       PERFORMANCE PACKAGE DESCRIPTION

          The Raceshop‘s 5.7L H.O. Camaro Performance Package is a new engine that

uses new internal and external components.       The major components of the

Performance Package are the engine block, camshaft, pistons, cylinder heads,

intake and exhaust manifolds, and a electronic control unit (ECU).       The

Performance Package uses a 5.7L engine block which is a direct replacement to

the stock 5.0L engine block.     The new camshaft, when compared to OEM,   is

altered in lift by 32 percent on the intake lobe and 31 percent on the exhaust

lobe.     Inlet duration is also increased by 17.5 percent and exhaust duration

increased by 14 percent.     The stock flat tappet hydraulic lifters are replaced

with hydraulic roller lifters, and thé pistons are changed to a cast

hypereutectic aluminum.     The cylinder heads are changed from cast iron to

aluminum construction, but retained similar valve dimensions.       The intake and

exhaust manifolds that are used as part of the Performance Package are similar

to their stock counterparts through the use of similar casting materials and

functional design.     For example the intake manifold of the Performance Package

is similar to the OEM intake manifold due to tfie aluminum construction and the

dual plane 4 barrel setup.     The exhaust manifolds are similar to the OEM in

both material and design.     Because the early ECU models had limited features, a

new ECU is included as part of the Performance Package.       The new ECU is a stock

replacement for late model General Motors vehicles modified to adapt to earlier

models.     The stock PROM is also replaced by an updated PROM that has been

calibrated for the new larger engine.       Changes are made to the spark and fuel

tables with the recommendation that the vehicle operates with premium octane

fuel only.    Other components of the Performance Package include new fuel,     oil

and water pumps, oil pan, valve covers, dual snorkel air cleaner,

                                        —2—


replacement GM catalytic converters, and a transmission shift kit.      Appendix A

list all the components and their specifications while Appendix B éhows the

installation instructions.      The Performance Package does not utilize the use of

an EGR valve or the carburetor heat stove for proper vehicle operation.

        v.   DISCUSSION OF THE PERFORMANCE PACKAGE

        Chevrolet Raceshop has requested that the 5.7L H.O. Camaro Performance

Package be exempted for fihe 1982—1987 Camaros equipped with a 5.0L V8 engine.

A 1987 Chevrolet Camaro using the 5.7L Performance Package engine was used as

the test vehicle.      The Raceshop performed'testing at ATDS to be compared

against the vehicle‘s emission standards.

        The results of the exhaust emissions test performed at ATDS are shown in

Table 1.

                                       Table 1
                                 CVs—75 TRST RESULTS

                    {Automotive Testing and Development Services)

                                        Ho         co         Nox
                                               (grams)mile)

              Test 1                    0.102      2.321      0.456

              Test 2                    0.259      2.859      0.481

              Average                   0.181       2.590     0. 469

              Standards                 0.39        7.0       0.7




        These results show that the modified vehicle emissions do not exceed

those of the vehicle‘s emission standards.

        The ARB also tested the vehicle withvthe 5.7L H.O. Camaro Performance

Package installed.      Test results showed comparable emission levels to that of

ATDS.


                                    Table 2

                            ARB CVS—75 Test Results

                                     HC         co         NOx

                                            (grams/mile)

             Device                  0.16        1.87      0.51

             Standard                0.39        7.0       0.7

       Raceshop submitted all of the required information and fulfilled the

requirements for an exemption.   The test results show that the Raceshop‘s

Performance Package meets the requirements for exemption.


APPENDIX A


    I                                                                      a|s         &                                                                                     P      is       |a

                                                                                       $                                                                                     2      |Z       |&
    ‘                                0.         CAMARO                     S |$1|E
                                                                           &           |=                    5.7L H.O0. CAMARO                                               & |E |Z
                         &        RSION         #101850                    § |g        |g               [efe}Y tsifel Ey hliyraale                                           S o 3
                                                                                  5    s                                                                                            =        s



                                JC                                         8 |s |5                                    PARTS LIST                                             § |4 |5
                                                                           82 |s|8 $|8                                                                                       88 |g|8 |8|8
            GTY                  PART NAME                    P/N                                                          PART NAME                        P/N
             1               5.71 HO ENGINE—ZZ3              10185072      x      X    x                                     CALIBRATION CONTD
             1               INSTRUCTION MANUAL              24502463      X      X    X                1        ‘GOOLING FAN SWITCH                        sos3190|         X                x
                                     INDUCTION SYSTEM                                                             (95C)
              1              LH DUCT              14070917                        x    x                                       EXHAUST SYSTEM
            1                AH DUCT                         14070918             x    _X               1         LH MANIFOLD                               14084063         X       _X  x
            4                sCchew                          11513801             x    _X               1         RH MANIFOLD                               i4094064         _X      X   x
        ____1                LHHOSE                          14073299             X    _X               1         HEAT STOVE, PLATE                         isigi063         _X      X_[_X_
              1              AH HOSE                         14083990             X    _X               1         HEAT STOVE, COVER                         14101064         _X      X        X
              1              AIR CLEANER ASSY.               25043641             X    _X               2         STUD                                      14042051         X       X        X
              1              STVD                  14048874                       X _X                  2           sTup                                    12336075         X       X        x
              1              NUT,WING             25512090                        X _X                  4           NUT                                     14019305         _X      X        x
              1              HOT AIR TUBE            469506                       X _X                  1           SEAL, EXHAUST                           igisess3         _X      _X       x
              1              FRESH AlR ELBOW        3970070                 _X    X_|                   1       _ . TAKEDOWN, DUAL CAT                      ior8s070         _X      X_|      x
                                        FUEL SYSTEM                                                     1           HEAT SHIELD,                            idi64i53|        X       x        x
              1              IN—TANK FUEL PUMP               14085385             X     X                         CATALYST
                             KIT                                                                        4         SCREW, MG.3—1.8x20                        12397828         x       X        X
        T40| FUELPUMP, IN—TANK                               »ste2ra        xX    X     X               1         PIPE, AIA To                              10077542         X       X        X
              1              STRAINER                        25056458       _X    X     X                         CONVERTER
              1              PRESSURE                        10185094       X     x     X               1         CLAMP, AIR PIPE                           22505116         X       X        X
                             REGULATOR                                                                  1         BRACKET,                                  10081609          X      X        X
              1              BRACKET, PRESSURE               ioi85069       X     X     X                         CONVERTER HANGER
                             REGULATOR                                                                  2         BOLT, CONVERTER TO                        11504596          X      X        X
              1              OUTLET FITTING 378                9432267      X     X     X                         BRACKET
                             PIPE TO 3/8 INVERTED                                                       1         INTERMEDIATE PIPE,                        24502461          X      |X       X
                             FLARE                                                                                MUFFLER, TAILPIPES®
              1              RETUANFITTING                   10185093       |_X   x     _X                                        TRANSMISSION
              1              2/8 PIPE TO 38 HOSE             10185096       X     X     X               1         SPRING, PRESSURE                           scssi64          X      X        %
                             FITTING                                                                              REGULATOR
K                                      CALIBRATION                                                      1         VALVE, TV BOOST                            8634940          _X     _X           X
              1              CONTROLLER, ECM       1228079                  X     _X    _X              1         SERVO, PISTON                              Bé42079          X      X            X
              1              CALIBRATOR, PROM                24502457             X                     1         SERVO, HOUSING                             8642110          X          X        X
                             1982—84 LG4                                                                          '            REAR SUSPENSION
                 1           CALIBRATOR, PROM                24502456       X           x               2        | LOWERCONTROL ARM |                       idi64151| X                  X        x
                             1985—87 LG4, 83—86 Leg                                                                                      DECALS
                 11_ |       SENSOR, KNOCK
                             MODULE, ELEC.
                                                              10456018
                                                              16128261
                                                                       |_XX             xX                  1     DBEGAL, UNbERHKOGOD                       Pasoaa6s X                   x        x
              2
                             SPARK CONTROL
                             METERING RODS,                    7033812      X     X     X
                                                                                                            i     TFL’g\‘EEMLIJlJPh}lJ;lBJEt
                                                                                                                  DECAL
                                                                                                                                             GNIY           2s6oR518 x                   x        x
                             _SECONDARY (AH)                                                        >
                                                                                                        For replacement exhaust system components, contact:; Flowmasier
                                   X= PART USED IN CONVERSION                                     Inc., 2975 Dutton Ave., Unit 3, Santa Rosa, CA 95407, 707—544—4761.

                                                                                                                                           VEHICLE IDENTIFICATION
                                                                                                                                    The H.O. 350 conversion kit is designed for
                               @                                                                                                  installation in 1982—87 Camaros originally
                                                                                                                                  eqyuipped with LG4 or L69 engines. Due to dif—
             ,2 w  éé                                                                                                             ferences in original equipment in these vehicles,
                 ;   P-                                                                                                           some ofthe compunents included in this conver—
                                                                                                                                  sion kit are not used with all yeur models and
                                                                                                                                  engines. The parts required to install the H.O.
            H.O. 350 ENGINE SPECIFICATIONS                                                                                        350 conversion package on a specifi¢ model year
        Part Number: 10185072 (223)                                                                                               and engine are noted in the chan above.
        Displacement: 5.7—liter (350ci)                                                                                             The factory—installed engine is identified by a
        Bore and Stroke; 4.00" x 3.48"                                                                                            letter code that uppears in the eighth place ofthe
        Compression Ratio: 9.8: 1                                                                                                 Vehicle Identification Number (VIN). In the fol—
        Piston Material: Cast hypereutectic aluminum                                                                              lowing example of a Vehicle Identification Num—
        Connecting Rod Material: 1053 forged steel                                                                                ber, the leter "H"is the engine code:
        Camshaft; Hydraulic roller tappet (#10185071)                 Rocker Arm Ratio: 1.5:1
                                                                                                                                                    1GIFP3IHOLL10001
         alve Lift (Infake/Exhaust): .474"/510"                       Oil Pressure (Normal): 40 psi @ 2000 rpm
          uration (Intake/Exhaust): 208/221 degrees                   Spark Plugs: AC FRSLS, 904 or MR43LTS                         The following are VIN engine codes for 1982—
        @ .050" tapper lift                                           Mauximum Recommended Engine Speed:                          87 Camaros with LG4 and L69 engines:
        Valve Lash (Intake/Exhaust): Zero/zero                        5800 rpm                                                         Year     VIN       Engine
        Cylinder Head Material: Cast aluminum                         Fuel Requirement: Unlcaded premium                                1983—86       "G"              L6
        Vaive Diameter (Intake/Exhaust): 1.94/1.50°                   92 octane (R+M/2)                                                 1982—87 "H"                    LG4

        2
                                       s en im aropmnsines   commanicnn                      ns   crvmcormnprmncceance o                            ammgerme      un    io       nemale


APPENDIX B


   7 ENGINE INSTALLATION
               ARBURETOR TEST                             DISTRIBUTOR GEAR REPLACEMENT                        utor gear roll pin with a punch, Removethe orig~
            50 conversion retains the original           The H.O. 350 conversion retains the original         inal distributor gear from the LG4 or L69 EST
eqyuipment LG4 or L69 computer—controlled               LG4 or L69 electronic distributor. The H.O. 350       ‘distributor, and replace it with the gear from the
Quadrajet carburetor. Before removing the orig~         engine assembly includes an HEI distributor           H.O. 350 distributor. Align the dimple on the
inal engine, test the carburetor to make sure that      with mechanical and vacuum spark advance              new distributor gear with the rotor point before
it is operating properly.                               mechanisms. This distributor cannot be used           inserting the gear retaining roll pin.
   This test requiresa standard dwell meter set on      with the Camaro‘s EST (Electronic Spark Tim—            Install the EST distributor in the H.O. engine
its 6—cylinder scale. Open the underhood wiring         ing) system.                                          following the instructions for distributorinstalla—
hamess cover near the heater blower motor and             The drive gear from the H.O. 350 distributor        tion in the Camaro service manual. Set the spark
comneet the dwell meter to the light blue wire          must be transferred to the original LG4 or L69        advance as specified on the tunc—up label.
with a green connector. When the engine is run—         distributor. The H.O. 350 engine has a steel roller             ENGINE INSTALLATION
ning at operating temperature, the dwell reading        tappet camshaft that requires a compatible dis—         The Z23 H.O. 350 engine is a direct replace—
should be 30 degrees (plus—or—minus 10 degrees).        tributor gear to prevent excessive wear. (NOTE:       moent for LG4 and L69 305ci engines. Refer to
                                                        If you ar installing an H.O. engine in a 1987         the Camaro service manual for engine removal
                                                        LG4 Camaro, thedistributor already has the cor—       and installation instructions. Transfer all mounts,
                                                        rect drive gear. If you are installing an H.O. en—    brackets, fittings, hoses, and accessories from
                                                        gine in a 1983—86 L69 or 1982—1986 LG4, you           the original engine to the H.O. 350.
                                                        must replace the distributor drive gear as shown.)      Plug all connections for the original LG4/L69
                                                          Remove the H.O. 350 distributor(after noting        exhaust gas recirculation (EGR) system. These
                                                        the pasmun ofthe rotor) and drive out thedistrib—     engines were equipped with EGR: however, the
                                                                                                              H.O. 350 conversion is certified to meet emis—
                                                                                                              sion requirements without an EGR system.
                                                                                                                Do not remove the EGR block—offplate or the
                                                                                                              choke heat stove block—off plate on the H.0, 350
                                                                                                              intake manifold. The H.0. 350 conversion does
                                                                                                              not require an EGR valve or a carburetor heat
  A dwell reading ouiside of this range indicates                                                             stove.                         ,
that the carburetor requires repair. See the                                                                    Transfer—the original LG4/L69 thermostat
Camaro service manual for cleaning and repair                                                                 housing to the H.0. 350 intake manifold. Use the
procedures.                                                                                                   H.0. 350‘s 180—degree F thermostat


    @= inpuction systEMm
                                                                                                                The driver‘s side duct mounts to the radiator
                                                                                                              crossmember and to a boss on the windshicld
                                                                                                              washer reservoir tank. Attach the ducts to the air
                                                                                                              cleaner snorkels with the fexible tubes supplied
                                                                                                               with the H.0. 350 conversion kit.




        AIR CLEANER ASSEMBLY                                                                                     The H.O. 350 conversion kit includes a crank—
   The H.O. 350 Camaro conversion includes a                                                                   case fresh air inlet tube. This tubeis longer than
  dual—snorkel air cleaner with cold air ducts. This                                                           the original part to compensate for the tailer
, air cleaner assembly was original equipment on                                                               height of the H.0. 350 intake manitold. Install
   1983—86 L69 Camaros; therefore these parts are                                                              this tube from the passenger side racker coverto
  not reguired when installing the H.O. 350 con—                                                                the air cleaner base,
  ve        § in a 1983—86 L69 Camaro.                                                                           \Connect the hot air tube from the driver‘s side
              he air ducts to the radiator crossmem—~                                                          exhaust manifold heat stove (see "Exhaust Sys—
    .       the supplied sheetmetal screws. Holes                                                              tem‘) to the air cleaner snorkel as shown.
  for the mounting serews are already drilled in the                                                             Connect the vacuum diaphragms on the air
  radiator mount. The passenger‘s side duct also                                                               cleaner snorkels to the port fitting on the carbu—
 attaches to a boss on the engine coolant reservoir                                                            retor body above the fuel filter with a "Tee" fit—
 tank.                                                                                                         ting and vacuum hose.

                                                                                                                                                                    3


      CARBURETOR CALIBRATION                            3), install the new secondary metering rods sup—
 The H.O. 350 conversion retains the original           plied with the conversion kit.
LG4/L69 electronically controlled Quadrajet               Use a T—8 Torx driver to remove the metering
carburetor, After you have tested the carburetor        rod hangerretaining screw. Remove and discard
for proper operation(see "Carburetor Test," page        the original secondary metering rods. Assemble




                                                        the replacement "AH" metering rods on the
                                                        hanger as shown, and install the assembly in the
                                                        carburetor, After tightening the retaining screw,
                                                        make sure that the metering rods operate freely.




                                                                  [= % ‘rgm.,.wy o ,«,

                                                                         €0 mempnems .


                                                           Replace the standard in—tank fue! pump with
                                                                                                               .g
                                                         the larger high—volume pump included with the
                                                         HL.0. 350 conversion kit,
             IN—TANK FUEL PUMP                                                                                    FUEL PRESSURE REGULATOR
   All H.O. 350 Camaro conversions require a
                                                                                                              The fuel pressure regulator included with the
 high—volume in—tank electric fuel pump. If you                                                             H.O. 350 conversion kit reduces the 14 psi fuel
 are converting a Camaro that was originally                                                                pressure produced by the in—tank elecific fuel
 equipped with an in—lank fuc pump, it is only                                                              pump to 6 psi at the carburetor needle and seat.
 necessary to replace the original pump with the                                                              Aitach the regulator mounting bracket—to the
 high—volume pump supplied with the H.O. con—
                                                                                                            H.O. 350 engine‘s mechanical fuel pump block
 version kit. if you are converting a Camara that
                                                                                                            off plate using the original fasteners. Mount thi
 was originally equipped with a mechanical (en—
                                                                                                            regulator beneuth the brackei as shown with thi
 gine—mounted) fuel pump, you must install the             To install the high—volume pump, first care—
                                                         fully pry off the strainer on the bottom of the    screws supplied.
 complete in—tank fuel pump kit and high—volume                                                               Install the %4" NPT x %" hose finting supplier
 pump that are included with the H.O. 350 con—           pump. Remove the fuel pump from the sender
                                                         assembly by pushing the pump toward the            with the H.O. 350 conversionkit in the regulato
 version kit. Refer to the instructions included
                                                         mounting ring and disengaging the connecting       inlet (arrow A). Connect this fitting to the fue
 with the in—tink conversion kit for installation                                                           tank line with 3%" fuel hose included with the in
 procedures.                                             hose from the fuel pump outlet.
                                                                                                            tunk electric fuel pump kit.
   See the Camaro service manual for instructions
                                                                                                              CAUTION: Use only hose approved for us
 on gas tank removal, Observeall safery precautions                                                         with gasoline. Use only the worm—type hos
 outlined in the service manual when working
                                                                                                            clamps included with the H.O. 350 conversio
 around flammable liquids, (NOTE: Wheninstall—
                                                                                                            kit. The use ofothertypes ofhose or clamps ma
 ing an H.0. 350 conversion kit, remove the stock
                                                                                                            cause a gasoline leak that could result in a fin
 exhaust systembefore removing the gus tunk. Re—
                                                                                                            Apply pipe sealant (such as Loctite® PST) to a
 install the gas tank with the new fuel pump and then
                                                                                                            fitting threads to prevent fuel leaks.
 install the H.O, 350exhaust system.)                                                                         Install the 4" NPT x 34" inverted MNare fittin
                                                                                                            in the front regulator outlet (arrow B). Conner
                                                                                                            this fitting to the original steel fuel line that feed
                                                                                                            the curburetor,
                                                           Trim the fuel pump pickup tube 1" to fit the       Install the 34" NPT x !4" hose fitting to the ree
                                                         tonger high—volume fuel pump. Deburr and clean     regulator outlet (arrow C). Connect this fitting t
                                                         the pickup tube. Install the high—volume fuel      the fuel return line. NOTE: Use only the %
                                                         pump and connectits outlet to the fuel line with   NPT x %4"fitting supplied. It has a .042" restric
                                                         the original hose. Install a new strainer on the   tion which is critical to the proper operation c
                                                         fuel pump inlet. Connect the fuel pump wires,      the fuel system.
                                                         noting the locution of the positive und negutive     Refer iothe instruetion sheer Included with th
   To remove the fue} pumpand pickup assembly            terminals on the fuel pump. Reinstall the pickup   fuel pressure regulator for fue} pressure adjus:
 from the fuel tank, rotate the retaining ring with      and pump assembly in the gas tank, and secure it   ment procedures. Set the fuel pressure with th
 a punch,                                                by rotating the retaining ring.                    engine hot and idling at 6 psi.


  L327 CALIBRATION
                                                                                                              ELECTRONIC SPARK CONTROL
                                                                                                           Electronic Spark Control (ESC) automatically
                                                                                                          retards the spark timing when a block—mounted
                                                                                                          sensor detects engine knock. The H.0. 350 con—
                                                                                                          version kit utilizes this system for models origi—
                                                                                                          nally equipped with ESC (1983—86 L69 and
                                                                                                          1985—87 LG4 Camaro). 1982—84LG4 Camaros
                                                                                                          do not have ESC; the ESC module and knock
                                                                                                          sensorincluded withthe H.O. 350 conversion kit
                                                                                                          are not used with these models.
                                                      Transfer the mounting brackets and hardware
 ENGINE CONTROL MODULE (ECM)                        from the original ECM to the replacement ECM.
  A replacement Engine Control Module (ECM)
is required for all H.O. 350 conversions. The
ECM controls spark timing and part—throttle fue}
mixture. A specially programmed PROM (chip)
calibrates the ECMto a specific application. Two
PROMs are included with the H.O. conversion
kit. Use #24502456 with a 1983—86 L69 or 1985—
87 LG4 Camaro; use #24502457 with a 1982—84
LG4 Camaro,                                                                                             If your Camaro has ESC, you must replace the
                                                                                                    ~ original ESC module with the module supplied
                                                                                                      with the H.0. 350 conversionkit. The module is
                                                                                                      located on the underhood wiring harness behind
                                                      Install the PROM calibration chip included the brake master cylinder. Unplug and discard
                                                    with the H.O, 350 conversion kit in the replace— the original ESC module; plug the wiring har—
                                                    ment ECM by removing the PROM cover with a ness connector into the new ESC module.
                                                    !a" socket. Carefully align the PROM‘s indexing
                                                     notchesin the socket; the PROM can only be in—
                                                     stalled one way.
                                                       After installing the PROM, replace the cover
                                                     and reinstall the ECM in the vehicle.

   The ECM is located underneath the passenger
 side dashboard. On some models, a trim panel
 must be removed to access the ECM.                                                                          Remove thecoolant drain plug on the passen—
                                                                                                           ger side of the H.O. 350 block. Install the ESC
                                                                                                           knock sensor in the threaded hole and tighten to
                                                                                                            15 fi./lbs.torque. NOTE: Do not overtighienthe
                                                                                                           ESC sensor; damage will result!
                                                                                                             Apply pipe sealant to the threads to prevent a
                                                                                                           coolant leak. Connect the ESC sensorto the wir—
                                                                                                           ing harness with the original connector.
                                                              COOLANT FAN SWITCH
                                                      A coolant fan switchis included with H.0. 350
                                                    conversion kits for vehicles equipped with elec—
                                                    tric fans (1983—86 L69 and 1985—87 LG4). This
  Remove the ECM mounting screws with a %%2"        switch tums on the radiator fan when the coolant
socket and lower the ECM from beneath the           temperature reaches 95 degrees C.
dashboard.




                                                                                                                     PREMIUM FUEL DECAL
                                                                                                             Apply the "Premium Unleaded Fuel Only"
                                                                                                           decal to the inside of the fuet tank filler door as
                                                                                                           shown.
                                                                                                             NOTE: The spark advance and fucl mixture
                                                                                                          calibrations for the H.O. 350 conversion are
                                                                                                          based on a minimum fuel octane rating of 92
                                                                                                          (R+M/2), it is extremely important on non—ESC
                                                      Install the coolunt fan switch in the threaded      equipped models (1982—84 LG4) to use only gas—
                                                    hole in the passenger side cylinder head, using       oline which meets this minimumoctane require~
Nx         C                           «C\ d        thread seafant to prevent coolant leaks. Connect      ment. Engine damage may result if loweroctane
  Disconnect the wiring harness from the ECM        the fan switch to the wiring harness with the orig—   fuel is used because these vehicles do not have
by depressing theclips on the plug—in connectors.   inal connector.                                       detonation—sensing capabilities.


    42 TRANSMISSION




                                                                                                                     Sss                           t
  These modifications will increase the shift                                                                      *el               Cl         10
firmness and improve the durability of the
Hydra—matie 700R4 four—speed automatic trans—                                                            Disassemble the servo by removing the snap
mission in heavy—duty applications. See the                                                            ring retainer from the shaft with a small screw—
Camaro service manual for transmission removal                                                         driver,
and installationinstructions.




                                                   Pull out the serve cover with a pair of pliers
                                                 until its O—ring seal stops its movement. Care—
                                                 fully work the O—ring seal out of the groove in the
                                                 servo cover with a small screwdriver as shown.
                                                 Use caution to prevent damaging the O—ring.

  The transmission components supplied with
the H.O. 350 conversion include the following:
servo piston (A); servo housing (B); pressure
regulator spring (C); and boost valve (D).




                                                   Note the direction of the fourth gear apply
                                                 piston. Remove the piston from the transmis—
                                                 sion case.          :




                                                                                                                                     e
                                                                                                         Carefully compress the servo assembly in a
                                                   Remove the servo assembly, holding it by            vise and remove the outer snap ring. Insert a
 rewaills d o ninans,c c n                  >    the center shaft. Install the supplied seals on       socket between the vise jaw and the servo us
  To remove the intermediate servo caver, de—    the new inner servo. Remove the seal from the         shown when compressing the servo; protect
press the cover and remove the retaining snap    original outer servo and install it on the re—        the servo against damage by the vise jaws with
ring with a small screwdriver.                   placement servo.                                      a soft cloth.

6

                                                             ho me rnenammetimemo ce o     novin=


                                                                                                                 Remove and discard the original valve and
                                                                                                               regulator spring. Assemble the replacement
                                                                                                               vaive and spring with the other components in
                                                                                                               the order shown. (NOTE: Use white grease to
                                                                                                               hold the small parts in place during reassembly.)
 Reassemble the servo components in the order
shown above, using the new servo housing and
servo piston supplied with the H.O. 350 conver—
sion kit.




  Reinstall the servo assembly in the transmis—
sion case. Then reinsiall the fourth gear apply
piston, the servo cover and O—ring seal, and the
servoustaining ring.              >
           . 350 conversion kit includes a new
  P      q_ul.kmr spring and vailve. These com—                                                                   Install the valve and spring assembly in the
          ise the main line pressure in the 700R4          Remove the fluid transfer tube to provide ac—        trans      ion. Push down on the valve with a
             ion to improve durability in heavy—duty     cess to the boost valve. Remove the snap ring          screwdriver and install the retaining ring with in—
            ons. To install the new spring and valve,    that retains the valve with internal snap ring pli—    ternal snap ring pliers. Reinstall the transmission
 you must remove the transmission pan and drain          ers while pushing down on the valve with a             pan. See the Camaro service manual for trans—
 the transmission fluid.                                 screwdriver.                                           mission installation instructions.


   _2 EXHAUST SYSTEM
                                                                                                                The cast iron exhaust manifolds used with the
                                                                                                                H.O. 350 conversion have 2%4" outlets. These
                                                                                                                manifolds have higher airflow potential than
                                                                                                                the manifolds with 1%4" diameter outlets origi—
                                                                                                                nally installed on LG4 engines. The exhaust
                                                                                                               manifolds included with the H.0. 350 conver—
                                                                                                               sion kit will also clear the raisedrocker cover
                                                                                                               rails on H.O, 350 cylinder heads.




          . 350 Camaro exhaust system im—                  Removethe original L69/LG4 exhaust system,            Assemble the two—piece air cleaner heat stove
   ’        e performance by reducing exhaust           mauffier, and catalytic converter heat shield. Save    on the driver‘s side exhnust manifold, The two
 13   ions with high—flow manifolds, two                all fasteners and bracketsfor reuse. (NOTE: Re—        halves ofthe stove can be spot—weldedtogether
c(mlyuc converters, a specially designed Y—             move the gas tank and install the high—volume in—      or joined with .125" blind steel rivets("pop"riv—
shaped intermediate pipe, a farge diameter tail—        tank electric fuel pump before installing the H.0.     ets) after drilling out the locating holes in the two
pipe, and a low—restriction muffer.                     350 exhaust system; see "Fuel System," page 4.)        parts.


     Install the supplied studs in the exhaust mani—
fold flanges. Use the two longerstuds in the pas—
sengerside exhaust manifold.




     Insert the supplied spacer ring between the pas—      Install the catalytic conveyter heat shield with      CAUTION: If you do not have the equipment
 senger side exhaust manifold and the take—down          four M6.3—1.8x20 screws. Attach the catalytic         and training to complete this procedure safely,
 pipe.                                                  converter to the mounting bracket with the sup—        this work must be done by a professional.
                                                        plied bolts. Weld the two intermediate pipes to          Connectthe catalytic converter air pipe to the
                                                        the catalytic converter outlets. Clamp and tack—      check valve on the passengerside AIR manifold
                                                        weld the talpipe to the "Y"—shaped intermediate       with the supplied air pipe. Secure the connection
                                                        pipe.               ‘     «                           with the supplied clamp.




      *          (mee          **~—
     tach the replacement catalytic converter
bracket to the transmission tailshaft using the
original fasteners.



_ 427 MISCELLANEOUS




              REAR SUSPENSION
  The rear control arms included with the H.0.
350 conversion kit have high—durometer (50K)
bushings. These harder bushings reduce wheel
ho     der hard acceleration. (For compartson,                                                                  — TUNE—UP SPECIFICATION LABEL
          jon bushings are 11K.)                                                                                Apply the H.O, 350 tune—up specification label
          heavy—duty rear control arms are direct                                                             to the underside ofthe haod direcily above the
repracements forthe original control arms. Sup—                                                               original Vehicle Emission Control Information
 port the vehicle securely with jackstands. Re—                                                               label.
 move and replace one rear control arm at a time,       ft. lbs. with therear axle supported at curb height     Remove the "Special Parts Notice" Iabel from
 reusing the original bolts. Tighten the bolts to 80    position.                                             the H.0. 350 rocker cover.


 8


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      THIS VEHICLE EQUIPPED WITH A CAMARO PERFORMANCE PACKAGE
                              P/N 10185077
                           ARB E. O. NO. D—278
JEVIATIONS FROM ORIGINAL TUNE—UP LABEL:
    1. IDLE SPEED—SETTING: 650 RPM (DRIVE)
    2. THIS VEHICLE DOES NOT USE THE EFE AND EGR SYSTEMS INDICATED ON THE ORIG(NAL
       TUNE—UP LABEL AND/ OR VACUUM HOSE ROUTING DIAGRAM,.
    GENERAL MOTORS CORPORATION                                             P/N 24502462


      THIS VEHICLE EQUIPPED WITH A CAMARO PERFORMANCE PACKAGE
                              P/N 10185077
                           ARB E. 0. NO. D—278
DEVIATIONS FROM ORIGINAL TUNE—UP LABEL:
    1. IDLE SPEESD SETTING: 650 RPM (DRIVE)
    2. THISVEHICLE DOES NOT USE THE EFE AND EGR SYSTEMS INDICATED ON THE ORIGINAL
       TUNE—UP LABEL AND/ OR VACUUM HOSE ROUTING DIAGRAM.
    GENERAL MOTORS CORPORATION                                             P/N 24502462




              YroOm%             mree MmMoheu



Document Created: 2005-09-01 12:45:41
Document Modified: 2005-09-01 12:45:41

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