Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on February 2, 1993.
As of Friday, May 30th, 2025 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:

CARB_D-278

(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

—.J.MT‘.-Z@—_);S'MC,H i1 & 6of fos & <IGR4 30 1445 0 % it hurmnty uad o s @G9)575— Lo® 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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