Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on June 20, 1974.
As of Thursday, February 21st, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsRemarks
5001974 and older vehicles equipped with 12-volt negative ground batteriesexcept for 1973-1974 Mercedes Benz , Mazda, Audi and Porsche vehicles, all General Motor vehicles equipped with an ignition coil intergrated into the distributor and all 1966-1970 vehicles equipped with a Dana or carter Nox retrofit device using an electronic speed sensor

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-20-1
  • Executive Order 20-1 / D20-1
  • ARB # D-20-1
  • Executive Order No: D-20-1
  • C.A.R.B. No. D-20-1
  • Resolution D-20-1
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-20-1 PDF

D-20-1 Document:



                         State of California
                         AIR RESOURCES BOARD


                         EXECUTIVE ORDER D—20—1
               Relating to Exemptions under Section 27156
                           of the Vehicle Code


                         TRI—STAR CORPORATION
                    "TIGER 500" and "TIGER PULSAR®"


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 undersigned by Section 39023 of
the Health and Safety Code;

IT IS ORDERED AND RESQOLYED: That the installation of neither the "Tiger
500" nor the "Tiger Pulsar" electronic ignition system manufactured by
Tri—Star Corporation has been found to reduce the effectiveness of required
motor vehicle pollution control devices and, therefore, is exempt from the
prohibitions of Section 27156 of the Vehicle Code for 1974 and older model—
year vehicles equipped with 12— volt negative ground batter1es except for
the following:

     1.. 1973—74 Mercedes Benz, Mazda, Audi and Porsche vehic1es;

     2.   All General Motors Corporation vehicles equipped with an
          ignition ;oil integrated into the distributor.

     3.   All 1966—70 model—year vehicles equipped with a Dana or
          Carter NOx retrofit device using an electronic speed sensor.

The "Tiger 500" and the "Tiger Pulsar" are solid—state electronic devices
which consist of a d—c to d—c converter, capacitors, diodes, resistors,
and silicon controlled rectifier electronic switch.

This Executive Order is valid provided that installation instructions
for this device will not recommend tuning the vehicle to specifications
different than those listed by the vehicle manufacturer.

Changes made to the design or operating conditions of the device as
originally submitted to the Air Resources Board for evaluation that
adversely affect the performance of the vehicle‘s poliution control
devices shall invalidate this Executive Order.

Marketing of this device using an ifdentification other than that shown
in this Executive Order or marketing of this device for an application
other than those listed in this Execuitive Order shall be prohibited unless
prior approval is obtained from the Air Resources Board.


Tri—Star Corporation                                             .
"TIGER 500" and "TIGER PULSAR"                             Executive Order D—20—1


This Executive Order does not constitute any opinion as to the effect
that the use of either device may have on any warranty either expressed
or implied by the venicle manufacturer.
THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION,
APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIRr RESOURCES BOARD OF
ANY CLATMS OF THE APPLICANT CONCERNING AMTI—POLLUTION BENEFITS OR ANY
ALLEGED BENEFITS OF THE "TIGER 500" OR THE "TIGER PULSAR" DEVICE.

 No claim of any kind, such as "Approved by 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 Professions Code makes unlawful, untrue
or misleading advertising, and Section 17534 makes violation punishable as
a misdemeanor.

Sections 39130. and 39184 of the Health and Safety Code provide as follows:

      "39130.   No person shall install, sell, offer for sale, or advertise,
      or, except in an application to the board for certification of a
      device, represent, any device as a motor vehicle pollution control
      device unless that device has been certified by the 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 section is
      a misdemeanor."

      "39184. (a) No person shall install, sell, offer for sale, or adver—
      tise, or, except in an application to the board for accreditation 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
     accredited by the board. No person shall sell, offer for sale, adver—
      tise, or represent any motor vehicle pollution control device as an
     accredited device which, in fact, is not an accredited device.>      Any
     violation of this subdivision is a misdemeanor."

Aqy apparent violation of the conditions of this Executive Order will be sub—
métfiedb%o the Attorney General of California for such action as he deems
advisable.

Executive Order D—20, dated February 28, 1974 is superseded and of no
further force and effect.



Executed at Sacramento, California, this    _«eT@    day of June, 1974.

                                   Original signed by
                                   William Simmons

                                   WILLIAM SIMMONS
                                   Executive Officer


                    State of California

                    AIR RESOURCES BOARD

                        June 12, 1974

                        Staff Report

            Evaluation of Tri—Star Corporation
                        "Tiger SST"
      Electronic Capacitive Discharge Ignition System
           For Exemption from the Prohibitions of
           Section 27156 of the Motor Vehicle Code


Introduction

Tri—Star Corporation, Grand Junction, Colorado, has applied for exemp—

tion from the prohibitions of Section 27156 of   the Motor Vehicle Code

for the "Tiger SST" electronic capacitive discharge ignition system.

Section 27156 prohibits the installation of any device which reduces

the effectiveness of motor vehicle emission control systems.      The

applicant intends to sell the device as an "after—market" part to

augment the existing standard ignition system for 1974 and older

model year vehicles equipped with a 12—volt negative ground battery,

except the following:

A.   1973—74 Mercedes Benz, Mazda, Audi and Porsche vehicles.

B.   All General Motors vehicles equipped with an ignition coil

     integrated into the distributor.


The Air Resources Board has adopted criteria for the evaluation of

"after—market" devices for compliance with Section 27156.   The basis

for evaluation is defined in the "Air Resources Board Criteria for
Determinihg Compliance with Section 27156 of the Motor Vehicle Code",
dated February 17, 1971.


II.   System Description

      For a general description of e1ectronié capacitive discharge
      ignition systems, see Staff Report "Evaluation of Capacitive

      Discharge and Transistorized Ignition Systems for Compliance

      with the Requirements of Section 27156 of the Motor Vehicle

      Code", dated February 14, 1973.


      The "Tiger SST" is a solid—state printed—circuit ignition system

      which consists of a d—c to d—c converter, a rectifier bridge, a
      storage capacitor, a coil, resistors, diodes, a silicon control

      rectifier and a switch.   The switch is to alToQ converting back to

      the conventional ignition system (see Figure 1 below).     The

      manufacturer claims that the "Tiger SST" device can deliver up

      to 45 KY at all speeds with a rise time of 0.5 microseconds, keeps

      the engine in a "just tunred" condition up to 70,000 miles, and

      improves gas mileage and performance in general.


      An early model of the Tiger series, "Tiger 500", was previously

      tested by the ARB staff; see staff report entitled "Evaluation

      of the Tri—Star Corporation ‘Tiger 500)",d;ted February 8, 1974;

      The "Tiger SST" device is technically the same as the previously

      evaluated "Tiger 500" device.     The "Tiger SST" is equipped with

      an extra R.F. choke to protect the silicon control rectifier by

      reducing the peak output current.    Aside from the R.F. choke,

      there is no significant circuit difference between the "Tiger 5on"

      and the "TigerSST" devices.


                                             t           w
                                       For'Tiger SST         Ignition System




            Battery           Reg_*:-/w                  Invertor                    coil
                        4              i
                              Wht      4/
       4g                              ~*
                                     «<t
                                     S B
Standard         «g—~
                              @rn
                               TR 3
                                  _:                                                 Rectifier
Ignition£        To Distributor j                                                     ectifie
   Coil                                    B———                                       Bridge




                                           n«
                                                             SCR                 R. F. Choke |

                                       J%or Standard Ignition System
            Figure 1 "Tiger SST" Electronic Ignition System Schematic


   III. Laboratory Test Data

            The ARB performed calibration fests to investigate the effect of

            the "Tiger SST" device on the engine electrical systefi.                      A 1974

            Ambassador (E 833605), 360 cubic inches displacement, two barrel

            carburetor, automatic transmission and conventional ignition system,
                                                                      »

            vehicle was used.          The following results were obtained:


            1.   Centrifugal spark advance angle measured from TDC (degrees)

                            RPM                   Baseline                Device
                        Idle (700)                   5                           5
                            1000                     6                         l 6
                            1500                    16.5                        17
                            2000                  * 19.5                        19
                            2500                    21                         21.5
                            3000                    23                         23


      2.   Secondary voltage rise time (microseconds)
                      RPM                       Baseline                        Device

                      Idle                         20                                20

      3.   Spark duration (microseconds)

                      RPM                       BaseTine                        Device

                      Idle                      1400+200                          130

                      2000                       550+250                          130

      4.   Maximum available secondary voltage (KV)

                      RPM                       Baselinge                       Device
                                                     2b                           Jb
                      Idle                          25—27              '         24—28

                      2200                          25—28                        24—29
      5.   Required secondary voltage (KYV)
                      RPM           —           Baseline                        Device

                      Idle                  ,           9                         10

                      2200                              7                         11
      6.   Idle exhaust emissions

                      — Baseline                                      Device

                 HC            ul                           HC _               CO.
              112 ppm              0.15%                    112 ppm            0.15%

IV.   Staff Evaluation

      The ARB staff report entitled "Evaluation of the Tri—Star Corporation
      ‘Tiger 500‘",dated February 8, 1974 shows that the installation of
      the "Tiger 500" electronic capacitive discharge ignition system

      will not adversely affect the existing emission control devices in
                                        a


a motor vehicle.   Since the "Tiger 500" and the "Tiger SST"
devices are very much alike with no significant electronic

difference, the ARB staff believes that the "Tiger SST"

should have no adverse effects on exhaust emissions.


The above ARB data show   that the "Tiger SST" device has little

or no effect on the centrifugal spark advance, the maximum available

secondary voltage, the required secondary voltage, the secondary

voltage rise time, or the idle exhaust emissions.   Based on the ARB

test data, the manufacturer‘s claims that the "Tiger SST" device is
capable of delivéring up to 45 kilo—volts and having 0.5 microsecond

rise time were not substantiated since insignificant changes were

observed with the device when compared with the baseline.      However ,

it was observed that the "Tiger SST" device reduces the spark duration

significantly to make the spark hotter since the output energy is un—

changed.   The spark duration, however, being significantly reduced is

still far above the minimum limit required by auto manufacturers for

combustion.
                                           &
Vehicles equipped with NOx emission control devices using a speed

sensor such as the Dana or Carter device cannot be equipped with

the "Tiger SST" device.   The speed sensor switch will interfere with

the timing of the "Tiger SST" device and might cause excessive mis—

fire.   The device will not function properly for vehicles equipped

with electronic ignition system whether it is a breakerless, capacitive

                          a


discharge, or transistorized type.   The "Tiger SST" output

voltage might overlap with the existing electronic system causing

damage to the engine‘s electrical system by overloading the

ignition wires or coil.   It also could cause excessive misfiring

due to erratic triggering from the points.


Conclusions and Recommendations

It is the staff opinion that Tri—Star Corp. "Tiger SST" electronic

capacitive discharge ignition system will not adversely affect

motor vehicle exhaust emissions when evaluated with respect to

the exhaust emissions obtained with a conventional ignition system

of a "tuned" engine.   This device may also have a beneficial effect

in the control of exhaust emissions in that the device may maintain

the "tuned" condition for a longer period of time.       Therefore, the

"Tiger SST" electronic capacit{ve discharge ignition system should

be   exempt from the prohibitions of Section 27156 of the Motor

Vehicle Code for 1974 and older model—year vehicles equipped with

a 12—volt negatfve ground battery except the following:

A.   1973—74 Mercedes Benz, Mazda, Audi, and Porsche .

B.   All vehicles equipped with an ignition coil integrated into the

     distributor or with an electronic ignition system whether it is

     a breakerless, capacitive discharge, or transistorized type.

C.   All 1966—70 model—year vehicles equipped with a Dana or Carter

     NOx retrofit device using an electronic speed sensor.



Document Created: 2005-09-01 12:42:10
Document Modified: 2005-09-01 12:42:10

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