Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on June 20, 1974.
As of Wednesday, February 5th, 2025 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:

CARB_D-20-1

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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