Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on September 9, 1992.
As of Wednesday, October 16th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
WI-TEC 3133-89-51989 GM 5.0L/ 5.7L TrucksECU replaced with a 1992 GM ECU part # 1616299. Heated air intake system removed. Kit includes supercharger, air cleaner, boost control solenoid, fuel pump, and GM ECU.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-231-2
  • Executive Order 231-2 / D231-2
  • ARB # D-231-2
  • Executive Order No: D-231-2
  • C.A.R.B. No. D-231-2
  • Resolution D-231-2
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-231-2 PDF

D-231-2 Document:



                                                     (Page 1 of 2)

                              State of California
                              AIR RESOURCES BOARD

                           EXECUTIVE ORDER D~231—2
                 Relating to Exemptions Under Section 27156
                            of the Vehicle Code

                          WHIPPLE INDUSTRIES, INC.
                              SUPERCHARGER KIT
      (P/N‘S WI~TEC 3133—89—5, WI~TEC 3133—91—5 AND WI~TEC 3133—92—5)

Pursuant to the authority vested in the Air Resources Board by Section 27156
of the Vehicle Code; and

Pursuant to the authority vested in the undersiqgned 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 Whipple
supercharger kit, part numbers WI—TEC 3133~89—5, WI—TEC 3133—91—5 and WI—TEC
3133—92—5, manufactured by Whipple Industries, Inc. of 3292 North Weber
Avenue, Fresno, CA 93722, has been found not 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 the following
vehicle applications equipped with automatic transmission:

     Whipple part number      .         Vehicle agglication

     wWI—~TEC 3133—89—5             '   1989 General Motors 5.0/5.7 liter trucks
     wWI—TBC 3133—91—5                  1990—91 General Motors 5.0/5.7 liter trucks
     wWI=TEC 3133—92—5                  1992 General Motors 5.0/5.7 liter trucks

The following modifications to the original equipmenfi emission controls are
allowed:

     1.   The original equipment electronic control unit in the 1989—1991
          model—year vehicles is replaced with the 1992 General Motors
          electronic control unit, part number 1616299.

     2.   The original heated air intake system is removed and cold—start
          emission problems are avoided by heated coolant water flowing
          through the throttle—body adapter.

     3.   The oriéinal air cleaner is replaced by the air cleaner assembly
          supplied with the supercharger kit.

This Executive Order is valid provided that installation instructions for
this supercharger will not recommend tuning the vehicle to specifications
different from those submitted by Whipple Industries, Inc.

Changes made to the design or operating conditions of the supercharger, as
exempt by the Air Resources Board, which adversely affect the performance of
a vehicle‘s pollution control system shall invalidate this Executive Order.


WHIPPLE INDUSTRIES, INC.                        EXECUTIVE ORDER D—231—2
WHIPPLE SUPERCHARGER KIT                        (Page 2 of 2)



Marketing of this supercharger using any identification other than that
shown in this Executive Order or marketing of this supercharger for an
application other than those listed in this Executive Order shall be
prohibited unless prior approval is obtained from the Air Resources Board.
Exemption of the supercharger shall not be construed as exemption to sell,
offer for sale, or advertisge any component of the kit as an individual
device.

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

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 BENEFITS OR ANY ALLEGED
BENEFITS OF WHIPPLE INDUSTRIES, INC.‘S SUPERCHARGER KITS.

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

Violation of any of the above conditions shall be grounds 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 holder 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, Caleornza, this    2day of September, 1992.



                                      (figgt}
                                         Clcj/£¢49<:
                                        R. B. Summerfield
                                        Assistant Division Chief
                                        Mobile Source Division


                       State of California
                       AIR RESOURCES BOARD




 EVALUATION OF WHIPPLE INDUSTRIES, INC.‘S 5.0/5.7 SUPERCHARGER KIT
           FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE
CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF THE
                   CALIFORNIA CODE OF REGULATIONS




                           September 1992


                                  State of California
                                  AIR RESOURCES BOARD




           EVALUATION OF WHIPPLE INDUSTRIES, INC.‘S 5.0/5.7 SUPERCHARGER KIT
                      FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE
          CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF THE
                             CALIFORNIA CODE OF REGULATIONS
en~;




                                           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




      Whipfile Industries, Inc., of 3292 North Weber Avenue, Fresno, California

92722 has applied for an exemption from the prohibitions in Section 27156 of

the California Vehicle Code (VC) for the Whipple Industries, Inc.‘s 5.0/5.7

supercharger kit.   The supercharger kit is designed for installation on 1989—

1992 model—year General Motors truckga equipped with automatic transmission and

a 5.0 liter or 5.7 liter engine.             |

       Based on the results from emission tests performed at an independent

laboratory and confirmatory tests at the Haagen—~Smit iaboratory on a 1992

Chevrolet pick—up truck, the staff concludes that Whipple Industries, Inc.‘s

5.0/5.7 supercharger kit will not adversely affect exhaust emission from

vehicles for which an exemption is requested.

       The staff recommends that Whipple Ifidustries, Inc. be granted an

exemption as requested and that Executive Order D~231—2 be issued.


                                 TABLE_OF CONTENTS




                                                               Page Number




SUMMARY

CcoNTENT S                                                          11

I.        INTRODUCTION

II.       concLUSsION

III.      RECOMMENDATION

Iv.       DEVICE DESCRIPTION

          SUPERCHARGCER KIT SYSTEM EVALfiATION AND DISCUSSION         4




                                          1i


          EVALUATION OF WHIPPLE INDUSTRIES, INC.‘S 5.0/5.7 SUPERCHARGER KIT
                    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

         Whipple Industries, Inc. of 3292 North Weber Avenue, Fresno, California

92722 has applied for an exemption from the prohibitions in Section 27156 of

the California Vehicle Code for the Whipple Industries,        Inc.‘s 5.0/5.7

supercharger kit.         The supercharger kit is deaignéd for installation on 1989—

1992 model—year General Motors pick—up trficka eqfiipped with automatic

transmission and a 5.0 liter or a 5.7 liter engine.             |

          Whipple Industries, Inc. has submitted data from testing on a 1992

Chevrolet pick—up truck at NGV Development Company, Lopg Beach, California.            In

addition, the Air Resources Board (ARB) conducted a confirmatory test at the

Haagen~Smit Laboratory.



II.       conCcLUSITONS

          Bagsed on the resgults from emission test performed at NGV Development

company and the confirmatory test by the ARB on a Chevrolet pick—up truck, the

staff concludes that Whipple Industries, Inc.‘s 5.0/5.7 supercharger kit will

not adversely affect exhaust emissions from vehicles for which an exemption is

 requested.




 III.     RECOMMENDATION

          The staff recommends that Whipple Industries, Inc. be granted an

 exemption for their 5.0/5.7 supercharger kit for installation on 1989—1992


model—year General Motors trucks equipped with automatic transmission and a 5.0

liter or a 5.7 liter engine.   The staff also recommends that Executive Order

D—231—2 be issued.




IV.    PEVICE_DESCRIPTION

       The Whipple Industries, Inc.‘s 5.0/5.7 supercharger kit is designed for

installation on 1989—1992 model~year Géneral Motors pick—up trucks equipped

with automatic trangmission and a 5.0 liter or a 5.7 liter engine.   The

supercharger kit is comprised of a WI~TEC 3133 supercharger, an air cleaner

system, boost control solenoid, fuel.pump, computer prom, General Motors —        .

computer and other plumbing necessary to install the kit.   The supercharger kit

operates in conjunction with the original equipment manufacturer (OEM) computer

controlled fuel injection and thebamissiofi control ayétem already certified

with the stock engine.

       The purpose of supercharging an engine is to increase its volumetric

efficiency and power output at pafticular engine loads and throttle openings.

At light engine loads and small throttle openings, the engine manifold pressure

and power output is the same as a nérmally aspirated engine.   At heavy engine

loads and increased throttle openings, the manifold pressure is increased by

the supercharger allowing more air and fuel to enter the engine, resulting in

higher power output.

       \The WI~TE¢ 3133 supercharger is a positive displacement (1.33L/rev) twin

crew rotor, compressor powered by a crankshaft driven serpentine belt.     The

maximum volume of air is determined by selecting the proper ratio between the


supercharger pulley and the crankshaft pulley.     The supercharger is driven

utilizing the engine‘s standard serpentine belt 1oop system at a ratio of 2.75

to 1 from the crankshaft pulley.     The air needed to operate the supercharger

enters the engine compartment through the stock fender location and into the

supplied air cleaner.    This air enters the stock throttle body injection,

mounted at the rear of the supercharger.     The fuel injected is controlled by

the OEM electronic control module.    The total engine air flow amount is

controlled in the same manner as the OEBM, by the throttle plate in the throttle

body injection.    The air/fuel mixture is compressed within the supercharger

inlet and outlet ports by the 6esign.of the twin screw rotors.     When the inlet

throttle plates are opened to allow for more flow, the mixture exits the outlet

port at higher pressure into the stock intake manifold.     Maximum positive

manifold pfessure is limited to 6.5 psi by the built in pressure ratio and

driven ratio.

       To maintain the correct air/fuel ratio during boost conditions,

additional fuel is supplied by increasing the fuel pressure.     This is performed

by installing a new throttle body pressure reqgulator cover and a new housing

which biases the throttle body fuel pressure reqgulator with manifold pressure

during boost.     A hose, which routes above—atmosphere manifold pressure to the

fuel pressure reqgulator during boost, is connected frbm the requlator housing

to a solenoid valve.     The solenoid valve is electrically controlled by a vacuum

switch, triggered only when in boost.      To provide the correct air/fuel ratio

 and spark timing, an engine calibration PROM has been optimized for the

 parameters.of the supercharger.     In addition to the PROM, the OEM computer is

 replaced on the 1989—1991 vehicle with the stock 1992 computer.     Whipple has


concluded that the 1992 computer compensates for drivebility problems

experienced in the earlier model—year vehicles.

         The fuel delivery and spark timing are calculated and determined by

measuring manifold pressure, engine RPM, throttle position, and coolant

temperature.    Fuel delivery is increased by the amount required during

acceleration enrichnent and wide open throttle conditions.    During normal

engine operation, the stock spark timing mdé is retaiped.     When in a wide open

throttle boost condition, the spark timing is increaaéd by a few degrees.

         When the supercharger kit is installed, the heéted-air intake system is

removed.     Instead, engine coolant is routed through the throttle body mounting

adaptor on the supercharger which increases fuel atomization during cold engine

operation.     Installation of Whipple Industries, Inc.‘s 5.0/5.7 supercharger kit

does not alter the OEM location of the oxygen sensof and the catalyst.        The

tune—up specifications also remain the same.



v.       SUPERCHARGER KIT _SYSTEM EVALUATION AND DISCUSSION

     |   A 1992 Chevrolet pick—up truck equipped with a 5.7 liter (350 CID) fuel

injected gasoline engine was used for the evaluation of the 5.0/5.7

supercharger kit.     The dynamometer inertia weight and loading were 5500—lbs and

19.9—hp respectively.

         Emission tests conducted by NGV Development Company for Whipple

Industries, Inc. consisted of one Cold—Start CVS—~75 emission test in thé

modified (supercharger kit system installed) confiquration.     Confirmatory tests


were performed by the ARB following the same test seguence.         A summary of the

test results is shown below:



                              Exhaust Emissions Test Results
                                On A 1992 Chevrolet pick—up
                                 (NGV Development Company)

Test                  Exhaust Emissions (gm/mi)
Mode                  NMHC                     co          .       NOx

Device                 441                     5.787                & 728
Device w/DF            «456          ‘         5.927           .    +728
Standard               & 50                    9 .0                1.0

                                     Confirmatory Test
                                 (Haagen—Smit Laboratory)

Device                 475                     6.075   '            & 685
Device w/DF            «492                    6.233                . 685
Standard               . 50                .   9.0                 1.0

         Results from the emission tests conducted at NGV Development Company and

the Haagen—Smit Laboratory show the vehicle emissions with the Whipple

Industries, Inc.‘s 5.0/5.7 supercharger kit installed to be lower than the

emission standards.     Based on the test results, the staff concludes that the

installation of the Whipple Industries, Inc.‘s 5.0/5.7 supercharger kit did not

have an adverse effect on exhaust emissions of the affected vehicles.         Whipple

Industries, Inc. submitted all the required information and fulfilled the

requirements for exemption.



Document Created: 2005-09-01 12:40:40
Document Modified: 2005-09-01 12:40:40

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