Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on May 27, 1993.
As of Sunday, August 25th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Models
1991-1993 General Motor G20-G30 heavy-duty trucks powered by a 5.7L ot 7.4 L V8 gasoline Engine and a 4L80K transmission

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-231-4
  • Executive Order 231-4 / D231-4
  • ARB # D-231-4
  • Executive Order No: D-231-4
  • C.A.R.B. No. D-231-4
  • Resolution D-231-4
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-231-4 PDF

D-231-4 Document:



                                                            (Page 1 of 2)

                                  State of California
                                  AIR RESOURCES BOARD


                                 EXECUTIVE ORDER D—231—4
                       ‘Relating to Exemptions Under Section 27156
                               j   of the Vehicle Code

                                 WHIPPLE INDUSTRIES, INC.
                                    — CALIBRATION PROM

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

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

       IT IS ORDERED AND RESOLVEND:  That the installation of the Calibration PROM
       manufactured by Whipple Industries, Inc. have been found not to reduce the
       effectiveness of required motor vehicle pollution control devices and,
       therefore, are exempt from the prohibitions of Section 27156 of the Vehicle
     _ Code for installation on 1991 to 1993 General Motors 620 or G30 heavy—duty
       trucks powered by a 5.7L or 7.4L vs gasoline englne and a 4L80E
       transmission.

       This Executive Order is valid provided that installation instructions for
       the Calibration PROM will not recommend tuning the vehicle to specifications
       different from those submitted by the device manufacturer.

       Changes made to the design or operating conditions of the device, as _
       exempted by the ARB, that adversely affect the performance of a vehicle‘s>
       pollution control system shall invalidate this Executive Order.

       Marketing of this device using an identification other than that shown in
       this Executive Order or marketing of this device for an application other
       than those listed in this Executive Order shall be prohlblted unless prior
       approval is obtained from the ARB.

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

       This Executive Order is granted based on results from emissions tests
       conducted in accordance with Cold—Start CVS—75 Federal Test Procedure.
       However, the ARB finds that reasonable grounds exist to believe that use of
      _the Calibration PROM may adversely affect emissions of motor vehicles when
       operating under conditions outside the parameters of the previously
       prescribed test procedures. Accordingly, the ARB reserves the right to
       conduct additional emission tests, in the future, as such tests are
       developed, that will more adequately measure emissions from all cycle
       phases.: If such test results demonstrate that the Calibration PROM
       adversely affect emissions during off—cycle conditions (defined as those
       conditions which are beyond the parameters of the Cold—Start CVS—75 Federal
       Test Procedure), this Executive Order shall be effectively rescinded as of
9m




       the date the test results are validated. Further, if such test results or


 WHIPPLE INDUSTRIES,    INC.        .     .           EXECUTIVE ORDER D—231—4
   ~                            *                     (Page 2 of 2)


 other evidence provides the ARB with reason to suspect that the Calibration
 PROM will affect the durability of the emission control system, Whipple
 Industries, Inc. shall be required to submit durability data to show that
 the durability of the vehicle emission control system is not, in fact,
 affected and/or that the add—on or modified part demonstrates adequate
 durability.      '

  In addition to the foregoing, the ARB reserves the right in the future to
  review this Executive Order and the exemption provided herein to assure that
  the exempted add—on or modified part continues to meet the standards and
* procedures of Title 13, California Code of Regulations, Section 2222, et
  seq.                      '

 THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, |
 APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESOURCES BOARD OF ANY
 CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED
 BENEFITS OF WHIPPLE INDUSTRIES, INC.*‘S CALIBRATION PROM.

 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.

 Section 17500 of the Business and Prdfgssiods Code makes untrue or |
 misleading. advertising unlawful, and Section 17534 makes violation
 punishable as a misdemeanor.

. Section 43644 of the Health and Safety Code provides as follows:

       "43644,   (a)}   No person shall install,   sell,   offer for sale, or
       advertise, or, except in an application to the state board for
       certification of a device, represent, any device as a motor vehicle
       pollution control device for use on any used motor vehicle unless that
       device has been certified by the state board.       No person shall sell,.
       offer for sale, advertise, or represent any motor vehicle pollution
       control device as a certified device which,      in fact,   is not a certified
       device.   Any violation of this subdivision is a misdemeanor."

 ‘Any apparent violation of the conditions of this Executive Order may result
  in its rescission or submission to the Attorney General of California for
  such action as he deems advisable.                                       ‘

. The Bureau of Automotive Repair will be notified by copy of this order.

 Executed at El Monte, California, this égz




                                              Mobile Source Division


                    State of California
                    AIR RESOURCES BOARD




 EVALUATION OF WHIPPLE INDUSTRIES, INC.‘S CALIBRATION PROM
     FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE
SsECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF
              THE CALIFORNIA CODE OF REGULATIONS




                          May 1993


                           State of California
                           AIR RESOURCES BOARD




        EVALUATION OF WHIPPLE INDUSTRIES, INC.‘S CALIBRATION PROM
           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 the mention of trade names or commercial products constitute
endorsement or recommendation for use.)


                                  SUMMARY




     Whipple Industries, Inc. has applied for an exemption from the

prohibitions of Vehicle Code Section 27156 for their Calibration PROM.     The

Calibration PROM is a programmable read only memory (PROM) computer chip for

installation on 1991 to 1993 General Motors G20 or G30 heavy—duty trucks

powered by a 5.7L or 7.4L V8 gasoline engine and a 4L80E transmission.

Whipple Industries, Inc. has submitted a completed application and all the

required information, as well as exhaust emissions test data performed at

Automotive Testing & Devélopment Services.

     Based on the submitted information and results of the emissions tests °

performed at Automotive Testing & Development Services, the staff concludes

that the installation of Whipple Industries, Inc.‘s Calibration PROM will

not adversely affect exhaust emissions on the specified vehicles.

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

as requested and that Executive Order D—231—4 be issued.


                            TABLE OF CONTENTS




                                                Page Number


SUMMARY                                               i

CONTENTS                                             ii

I.         INTRODUCTION                               1

II.    _   CONCLUSION                                 1

III.       RECOMMENDATION                             1

IV.        CALIBRATION PROM DESCRIPTION               1

v.         EVALUATION OF THE CALIBRATION PROM         2
                                          '-h
                                     p—


         EVALUATION OF WHIPPLE INDUSTRIES, INC.‘S CALIBRATION PROM FOR
  EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE SECTION 27156 IN ACCORDANCE
      wWITH SECTION 2222, TITLE 13, OF THE CALIFORNIA CODE OF REGULATIONS




’I.     INTRODUCTION

        Whipple Industries,   Inc. of 3292 N. Weber Ave.,      Fresno,   CA 93722, has

 applied for an exemption from the prohibitions of Vehicle Code Section 27156

 for their Calibration PROM. | The'Calibration PROM is a programmable read

 only memory   (PROM)   computervchip,   for installation on 1991 to 1993 General

 Motors G20 or 630 heavy—duty trucks powered by a 5.7L or 7.4L VS8 gasoline

 engine and a 4L80E transmission.        Whipple Industries,    Inc.   has submitted a

 completed application and all the required information, as well as exhaust

 emissions test data performed at Automotive Testing & Development Services

 on a 1991 7.4L Chevrolet C3500 truck.        |

 II.    CONCLUSION

        Based on the submitted information and the results from exhaust

 emissions test performed at Automotive Testing & Development Services, the

 staff concludes that Whipple Industries, Inc.‘s Calibration PROM will not

 adversely affect exhaust emissions from vehicles for which the exemption is

 requested.

 III.   RECOMMENDATION

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

 exemption as requested and that Executive Order D—231—4 be issued.

 IV.     CALIBRATION PROM DESCRIPTION

        Many computer controlled vehicles are equipped with an electronic

 control unit (ECU) which is programmed using a PROM.            Signals detected by

 the vehicle‘s sensors are fed directly into the ECU where they are analyzed

 and compared to the operational data programmed inside the PROM.              The PROM


         sends out signals for appropriate adjustments to be made in the engine‘s

         operation in response to any changing conditions.    For example, a PROM will

         make adjgstments to the spark and fuel delivery of the engine to maintain

         optimum performance and>economy.   Thus, by modifying data in the PROM, spark

         timing and fuel delivery can be adjusted.

              Whipple Industries, Inc.‘s Calibration PROM modify the spark tables and

         fuel curves of the original equipment manufacturer‘s (OEM) PROM under full

         throttle operation.   Therefore, the PROM monitors and modifies the vehicle

         operation under open—loop modes.   Whipple Indusfiries, Inc. claims these

         modifications translate to an increase in torque and horsepower.    No

         modifications contained in the Calibration PROM affect throttle response and

         driveability, under closed—loop conditions (normal day—to—day driving).      The

         manufacturer claims that the modifications offer enhanced performance and

         acceleration during high speed/torque operation.    This is obtained by
289




         alteriné the OEM fuel and timing tables in the PROM which affect opefi—loop

         parameters.

         v.   EVALUATION 6F THE CALIBRATION _PROM

              A 1991 chevroiet.c3500 truck powered by a 7.4L engine was used for the

         evaluation of the Calibration Prom.     The dynamometer inertia weight and

         loading used during the testing were 8000 lbs. and 16.3 hp, respectively.

              Emissions testing conducted by Automotive Testing & Development

         Services consisted of §ne cold—start CVS—75 Federal Test Procedure with the

         vehicle in the baseline confiquration followed by one cold—start CVS—75

         Federal Test Procedure with the vehicle in the modified configuration

         (Calibration PROM insfalled).   Modified emission levels were compared

         against the vehicle‘s baseline emission levels.

              The results of the exhaust emissions tests performed at the Automotive

         Testing & Development Services are shown in Table 1.
Lomes,




                                               ‘aug._


                                         Table 1

                               CcVS—75    TEST RESULTS


                  (Automotive Testing & Development Services)

                                           HC        co       NOx

                  Baseline               o.58      1i1.93    2.86
                  Device                 0 .60     13.13     2.63

                  Difference             0 .02      1.20 —O0.23




     The CVS—75 emissions test results at the Automotive Testing &

Development Services demonstrated that the HC, CO and NOx emission levels

‘are within the comparative emission allowances of 6.1 grams per mile or 10

percent of baseline on HC and NOx, and 1.0 grams per mile or 15 percent of

baseline on CO.   Staff did not perform confirmatory testing to validaté test

data submitted by Whipple Industries.                                              |

     Whipple Industries has submitted all the required inforfiation and

fulfilled the requirements for an exemption.                The test results confirm that

the Whipple Industries‘ Calibration PROMs meet the requirements for the

exemption.



Document Created: 2005-09-01 12:45:17
Document Modified: 2005-09-01 12:45:17

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