Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on February 25, 1986.
As of Tuesday, February 4th, 2025 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
40 IDA 3C(1)1969-1971 Porsche 911T with 2.2T engine

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-144-1
  • Executive Order 144-1 / D144-1
  • ARB # D-144-1
  • Executive Order No: D-144-1
  • C.A.R.B. No. D-144-1
  • Resolution D-144-1
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-144-1 PDF

D-144-1 Document:

CARB_D-144-1

(Page 1 of 2) State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—144—1 Relating to Exemptions under Section 27156 of the Vehicle Code PORSCHE MAILORDER WEBER 40 IDA 3C {1) 2.2T CARBURETOR CONVERSION KIT 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 Sections 39515 and 39516 of the Health and Safety Code and Executive Order G—4§—5; IT IS ORDERED AND RESOLVED: That the installation of the Weber 40 IDA 3C (1) 2.27T carburetor conversion kit distributed by Porsche Mailorder, Santa Monica, California 90402, has been found not 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 1969—1971 Porsche 9111 with 2.2L engines. Engine Size (L) Venturi Main Emulsion Idle Air Cor. and Model! {mm) Jet ({mm) . Tube Jet (mm) Jet (ma} 2.21T 30 1.25 F—1 0.55 1.80 This Executive Order is valid provided that installation instructions for this device 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 Air Resources Board, that adversely affect the performance of a vehicle‘s pollution control system shall invalidate this Executive Order. Marketing of this davice 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 prohibited unless prior approval is obtained from tha Air Resources Board. Exemption of a kit shail not be construed as an exemption to sell, offer for sale, or advertise any component of a kit as an individual device.

PORSCHE MAILORDER EXECUTIVE ORDER D—144—1 ' (Page 2 of 2) This Executive Order does not constitute any opinion as to the effect that the use of this device 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 ANY CLAIMS OF THE APPLICANT CONCERNING ANTI—PQLLUTION SBENEFITS OR ANY ALLEGED BENEFITS OF THE WEBER 40 IDA 3C (1) 2.2T CARBURETOR CONVERSION KIT. No claim of any kind, such as "Approved by Air Resources Soard" 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 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 vehnicle 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 Exectutive Order will be submitted to the Attorney General of California for such action as he deems advisable. _{i Executed at El Monte, California, this S * day of rebruary, 1986. < 4Wt HA11V! / 171 , ,,:\15/ K. D. Drachand, Chief Mobile Source Division

State of California AIR RESOURCES BOARD EVALUATION OF PORSCHE MAILORDER‘S 40 IDA 3C (1) 2.2T WEBER CARBURETOR CONVERSION KIT FOR EXEMPTION FROM THE PROHIBITIONS IN VEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13 OF THE CALIFORNIA ADMINISTRATIVE CODE FEBRUARY, 1986

EVALUATION OF PORSCHE MAILORDER‘S 40 IDA 3C (1) 2.2T WEBER CARBURETOR CONVERSION KIT FOR EXEMPTION FROM THE PROHIBITIONS IN VEKICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13 OF THE CALIFORNIA ADMINISTRATIVE CODE by MOBILE SOURCE DIVISION State of California AIR RESOURCES BOARD 9528 Telstar Avenue E1 Monte, CA 91731 (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 Porsche Mailorder has requested exemption from the prohibitions in _ Vehicle Code Section 27156 for an aftermarket carburetor conversion kit. The kit is designed to replace the original equipment Zenith 40 TIN or Weber 40 IDT carburetors used on 1969—1971 model—year Porsche 911 T vehicles. The applicant, in order to demonstrate no adverse emissions effects with the use of the conversion kit performed comparative exhaust emission tests. The test results revealed that: i) stock systems are high emitters due to age and deterioration and that repair parts are quite costly acting as a deterrence for owners to repair; and ii) the conversion kit being applied for did not increase the emissions of the vehicle tested. Based on the engineering evaluation of the conversion kit and an analysis of emission test data, the staff recommends that an exemption be granted for the vehicles applied for and that Executive Order D—144—1 be issued.

CONTENTS Page Number SUMMARY i CONTENTS 1i 1. INTRODUCTION 1 II. CONCLUSION III. RECOMMENDATIONS IV. DEVICE DESCRIPTION V. DEVICE EVALUATION VI. DISCUSSION APPENDIX WEBER 40 IDA 3C (1) CARBURETOR A—1 MIXTURE ADJUSTMENT PROCEDURES A—2 i1

EVALUATION OF PORSCHE MAILORDER‘S 40 IDA 3C (1) 2.2T WEBER CARBURETOR CONVERSION KIT FOR EXEMPTION FROM THE PROHIBITIONS IN VEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13 OF THE CALIFORNIA ADMINISTRATIVE CODE I. INTRODUCTION Porsche Mailorder located in Santa Monica, California 90402, has applied for exemption from the prohibitions of Vehicle Code Section 27156 for an aftermarket add—on replacement carburetor conversion kit. The conversion kit uses two model 40 IDA 3C Weber carburetors to replace the original equipment (OE) Zenith 40 TIN or Weber 40 IDT carburetors found on 1969 through 1971 model—year Porsche 911 T vehicles. The applicant, in order to demonstrate that an adverse emissions impact would not occur with the use of the conversion kit, performed comparative exhaust emission tests on a vehicle equipped with the OE carburetion and then with the aftermarket carburetor kit. This report describes the Air Resources Board‘s (ARB) evaluation of the Weber model 40 IDA 3C (1) 2.2T carburetor conversion kit and discusses the findings of the evaluation. II. CONCLUSIONS Based upon the applicant‘s submitted comparative exhaust emission data the staff has concluded that the installation of the Weber 40 IDA 3C (1) 2.2T carburetor conversion kit would not cause an adverse emissions impact. III. RECOMMENDATIONS The staff recommends that Porsche Mailorder be granted exemption from the prohibitions in Vehicle Code Section 27156 for the Weber 40 IDA 3C (1) 2.2T carbuertor conversion kit for use on the vehicles requested.

The staff also recommends that Executive Order D—144—1 be issued allowing use of the Weber 40 IDA 3C (1) 2.2T carburetor conversion kit on limited 1969—1971 model—year Porsche 911 T vehicles. IV. DEVICE DESCRIPTION The Weber 40 IDA 3C (1) carburetor is of a triple venturi downdraft type and two units are required for each application. All throttles (6) are simultaneously operated by a common linkage. Each paired triple venturi carburetor contains a dual float and individual idle, main, and accelerator circuits. However, it contains neither a choke nor a power enrichment circuit which is common among these types of carburetors (see Appendix 1). Weber carburetors are well known as being adaptable for various types of driving applications. In order for the applicant to provide standardized components for this vehicle application, Table 1 is provided. Table 1 Weber 40 IDA 3C (1) Component Variables Engine Size Venturi Main Emulsion Idle Air. Cor. and Model {mm) Jet {mn) Tube Jet {mm) Jet (mm) 2.21 30 1.25 F—1 0.55 1.80 All of Porsche Mailorder‘s Weber 40 IDA 3C (1) carburetors use special extefided secondary venturi tubes. The applicant‘s mixture adjustment procedures for the Weber 40 IDA 3C (1) carburetors are found in Appendix 2. The procedure basically states that the carburetors are to be adjusted equally and individually to obtain the smoothest idle. A "Uni—Syn" (air flow meter) is needed to measure and adjust each venturi for equal air flow.

Idle HC/CO limits are not given for adjustment of the carburetors, however, when adjustments are performed according to the installation instructions, the emission levels are less than the MVIP idle standard adopted by the State for this type of vehicle. V. DEVICE EVALUATION The applicant submitted comparative exhaust emission data from tests performed by Los Angele s Emission Laboratory, Inc. The procedure used for the evaluation was the CVS—75 as explained in the Code of Federal Regulations, Part 86:00. The test vehicle is described in Table 2 and its comparative exhaust emission result s are found in Table 3. Prior to the baseline tests the test vehicle was adjusted and set to original equipment specifications. Table 2 Test Vehicle Description Year 1971 Make Porsche Model 911 T Eng. Size 135.0 CID 2.2L) Emission Controls PCV, Evap, U Odometer Mil eage 111,000 Transmission Manual (1) PCV — positive crankcease ventilation; Evap — Evaporative emission controls; Table 3 Exhaust Emission Results Exhaust Emissions in gm/mi Fuel Economy Test Type HC CO NOx mi/gal Baseline 12.2 104.3 0.77 Device 9.0 60. 7 0.43 Typical Emission Values 1971 w/ 110,00 mi. 7.8 80.9 3.80 N/A

The ARB did not perform confirmatory testing of the conversion kit due to lack of a well maintained test vehicle and extreme costs in repairing one to appropriate levels. VI. DISCUSSION As evident from the comparative emission results the baseline HC and CO values are above typical 197l emission levels. Although the test vehicle was tuned prior to testing, it is apparent that the OE carburetion produced emission levels above the typical values for the 1971 model—year. The staff also performed an analysis of emission inspection data of six— cylinder Porsche vehicles having been tested at the time of registration change and found that 90% of the vehicles failed at least one of the idle or loaded mode HC/CO limits. The staff contacted several Porsche dealerships in the area and questioned service personnel about repairs tb this type of carburetion system. It was found that the replacement cost of the OEM carburetors is $630.00 each, making the cost of replacing both carburetors well over a thousand dollars. The high repair cost acts as a deterrence for the proper repair of the OE system. The Weber 40 IOA 3C {1) 2.2T carburetor conversion kit is similar to the same carburetors used on earlier model—year Porsches. Although these carburetors require precise adjustment to operate properly, most of the early foreign vehicles use multiple carburetors similar to these and most repair personnel are familiar with them. Additionally, parts to repair or renew these carburetors are readily available. The deterioration factor of high performance sports cars such as Porches with mileage in excess of 50,000 miles is extremely high. This is also compounded since the model—year vehicles for this application are approaching obsolescence and replacement parts are becoming extinct. — 4 L

The exhaust emission levels from the test vehicle with the Weber carburetors installed were lower than the emission levels with the vehicle in the baseline configuration. There were no exhaust emission standards for the 1971 model—year using the CVS test procedures, therefore, the results can only be compared to typical values for the 1971 model year. This comparison shows that CO and NOx were well below the typical values and HC was only slightly above the typical values. The staff believes that the installation of the Porsche Mailorder 40 IDA 3C (1) 2.2T carburetor conversion kit will not have an adverse affect on the exhaust emissions from the vehicles for which the exemption is requested.

A—2 + . WEBER 40 IDA 3C ADJUSTMENT , 1t‘s being taken for gnranted that you have had some experience working with Porsche engines, at Least at the tune—up fevel. Webers are easy to adjust when companed to other Porsche induction systems but they ane much harder to adjust than an American two barrel. 1t takes a certain feel; which usuatly can be LZcormned. Before attempting to adjust the carbs the engine must have comrect cam and ignuition timing aftong with a careful valve adjustment. The points, plugs, distri— butor cap, ignition wmires, ete., should be in Like—new condition. The distmributor must be mechanical advance or modified for straight mechanical advance. The compression differentialt between the cylinders should not exceed 20 psi max. An enging compartment fuel filten mill keep the carbs clean Longer,. When the ainr cleaner is finolly instatled, it should have a clean ehement. DEFINITIONS: > . Front, Back, Left, Right, ete., ane defined from your position as you sit in the dhriver‘s seat. . The Throttle Body is the main part of the canb. What it doesn‘t contain is attached to if. The Mixture Schews thread into the hase of each throttfe bore. They have aprings to maintain a sutting and there ake three of them in each camburetorn. Be coreful as you turn these in as they seat in the throttle body. Turning a mixtune screw in Zeans the mixture and turmning it out does the nevense. The Idfe Scrow is sometimes catled the idfe atop sorew. There is one on the back cf each canb and it determines the minimum throttle setting through its action on the throttle arm of the corb. When this sorem is tuined afl the way out the thiottle plates rnest against the throttle bores. ‘ The Ainr Scrows ane similar to the mixture screms in that they openate on the needle vaflve principle. There are also thriee of these in each carb and they ane Zocated close to the mixture sorews. They have an 8 mm flock nut on them to maintain their seiting. As they ane adjusted out they fet ainr aLlip around the throttle plates to equalize the volume of mixture entering each cylinder at ldfe. The basic setting is 1/2 tuin out and great care is to be taken since these sorems also scat 4n the throttle body. Side to Side Bafance means equal vacuum between the two sideos of the engine thiough adjusiing the iale scaows and throttle Linkage. TOOLS needed to adfus%t the carbs ane: Stubby screw drivers io adjusi the mixture and air Acrous STE SYNCHROQMETER f{for adfuating vacuum at the aqlir screws [available at Porsche Two & mm combination wrenches pfus a Tnm one. Mailorder} P 2264; a.PaM::hg aspecial too?l that aflows you to check the 5&0&{ LZevel _ with engine amnming{available at PORSCHE MATLORDER) A samatt co measuring vial; useful for measuring the accelerator pump infjfection quantity ' These instructions atart with the engine thoroughty cleaned and the mani{ofds gi”%;.mmuad with new gaskets. The Lbinkage should be clean and high temp grease ed to the bafl sockets. An & mm open end wiexch can be used as a ball joint eparator, Now gaskets ane used under the carburetors when they are instalZed. The air horn sahiefd is the part of the ainr cheanen that is clamped to the top of 4 —— +CLEAN THE CAPTURETOR® USIDE AUD OUT BEFORE INSTALLIUG. ho +y@ PCued ~10m # —t bowl venrnts on 40mm carbsl soeed mepraentiet he ie «> se Pe hoom en mm

*L :ton by the ainr houns. Anew gasket should go between the air horn shieclkd | fi; ftllaxzbgkbmubln. A gasket can go under athe air hokns if you want to be sure of gerting an acourate adjustment with the Uni—Syn. _ Next, the Linkage should be hooked up excopt for the ahort batt fointed carburator nods. If you are converting to Webers from leniths, the Linkage akm connected to the crossbar on the might side sometimes has to be bent further to the right to aftfow the shont bafll jointed canb nod to travel in a totaffly verticat plane when vieming the mechanism from the rear of the vehiclke. Find the idfescrew at the rear of each carb and twin the screw aff the way out ao that the thaottfle plates nest against the throtitle bore watls. Now turn the serew in until it {just touches the throtife arm and then turn it 1/2 tutn more. Repeat with the othercarb. Now adjust the short bafl jointed reds so that they can be snapped onto the thriottle anm bafl without disturbing the throttle setting. This should give the carbs side to side bafance. Oil the throttle shafts and acceferator pump Linkage (hencefonth every 3,000 mifes)} and check for asmooth operation. Take the play out of the Llinkage by. shontening the Llong bafl jointed rod that connects the pivot point on the front of the Leoft menijofd to the crossbar; making saure that the throttle closes all the way. Next, have someone get inside the canr and {ffZoor the gas pedalt while you are Looking into the carbs to make swre the throitle plates nrise to a complete vertical position. You may have to adjust the thiottle stop behind the pedal, Be sure throtife plates don‘t go past the vertical position. . You can now hook up the fguel Lines. f’g the original braided fuel Llines to the carburetors anre old and ragged and you don‘t want to buy the complete set—up from Porsche you can nemove the entire assembly from the car, cut about 1/2" from the metalt Llines and instafl regular neoprene fue?l hose andstainfess hose clamps. PDon‘t {forget the fifters,. The German high pressure fuel Lline is safenr. You now have allk your toolks together and are ready to adjust the carbs. he initial adjustment on the Mixture Screwms is 1 1/2 tuins out {rom the seats. ‘he Idbe Screws are 172 tuwin in after touching the throttle arm on each carb. he Ain Screms are 1/2 turn out4 & mm nuts are Llightly Locked with the scrows being hefd stationary. Attach the Tach—Dwell Meter (on CD ignition the hot Lead goes to an adaptor on the point wire connection on the distzibutor}. Warm the engine to at leaat 140 degrees. Unlock the rod from the right carb and eventy tuin the idfe serews in until the tach reads 1190 npm. Chech the side to side batance of the carbs with the Uni—Syn to make sure both sides of the engine are pulling equal vacuum. Adjust an idle screw i{f need be. Pick a barre? and twor the mixture acrow in until the engine speed drops and then slowly out again until 4t auns smoothly. Remember to Ret the engine speed atabilize afier each increment of acrew turn. 1j you found that the engine nuns smoothly at less than the initial 1 1/2 tuin setitting then you can turn afl the uther mixture screms a half turn in and start over. 1f you need 2 1/2 turns to make the engine sun well then do it. 3 1/2 turna out on more usually caftfs for bigger idle jots. 1{f the engine doean‘t kespond when you tuin one of the mixture scxems in and out it means that the cylinder is not getting ignition or it is not getting idfe mixture. 1f the ignition and compremsion on the cylinder check out then an idle passage is plugged. Remove the mixture screw and idle jet and blow air back and forth to clear the ubstnuction. DON‘T put compressed air through the fLloat vent. If this doesn‘t wouk the idfe passages have to be boiled out and possibly checked with a duct guage. Aéways cil o—rings when renfacing idfe jets. After gyou have the idfe mixture initiatly adjusted you can bring out your Uni—Syn and adjust the Air Serewm$. Find the barznel which is pullZing the most ‘sacuum, adjust the fEoating baiil to the center Level in the Uni—Syn using the justment on the Uni—Syn, then adjust the other cylinders to an equal vacuum ing the ainr screws,. The cylinder which is pulling the most vacuum you LZeave onge. Reomember to unfock the nuts befonre adjusiing the air serews. Tighten

— them by hand as gyou go afong; when you‘re finished you can tighten them using the &mm wrench while hkholding the screw stationary with the stubby screwdriver. ‘ Now readjust the mixture sorows until you get the correct adjustment. ,.om lsuailky gyou‘ll tuim the mixture sorew in until the engine slows down and then ul out again aftouly until it runs smoothly and then perhaps another haff turin. You nt the maximum apeed with the Lleast fuel. 1¢ takes practice. Sometimes as you in out the mixture serew it apeeds up the engine enough to advance the timing and that immediately adds 300 on 400 npm. When you tiuin the idfe screus back a hair to conrect this the weights flop back and this is what sfows the engine. 1t‘s best to got your initial adjustment anround 1100 xpm and hope the distributor doesn‘t intercede. Check the aide to side bafance each time you adjust the idfe screws. The mixtures can be a LZittle fean or a LZitile aich but they must be consiatent from cylinder to cylinder. When you are finiashed adjusting the mixture scomrews back—of{ the idfe screws eventy to §50—950 apm and check bafance. Adjust the rod thait attaches to the right carb thiotile arm unfess it will snap on without moving the thiottle. You can check the befence at 3000 apm afso. Before you put the ain cleaner on take a Zook at the front of the engine in the anrea of the pressure sonder and thermostat. 1{ 4t‘s wet with oil put a new o—king on the thenmostat before your clutch gets wet. You cheok the injection quantity with a narion co mersuring vial which can be purchased {from a pharmaceuticaZl supply house. Attach a wine around it and hang it down to catch the gas as it squiria out of the acceferator pump jet. .8 co for one complete throttle action is about right. The injection quantity can be vanried by adjusting the Length of the stroke using the nuts on the threaded shaft. The ignition is turned off during this cpenation.. Start engine to burin out gas each time. The {ffoat Llevel should afways be checked on new carburetors. It‘s a good idea to check the float lovel when a carburetor is aesbuilt and new needie valves are tabtled. It‘s possible to check the {Looat Llewel with the engine aunning using * ische tool P ??6a. This gauge clamps onto the {Lloat bowl after you remove the L bowL? plug. Remember to use the fiber washer which comes with the quage and & the gauge in fairty tight since if it Lleaks the float won‘t aise and gas will pour out of the carb when you start the engine. Alwoys wipe up any spilled gas after you instolk the quage and before you start the engine. I1f the {Lloat Llevel ds incornect, you remove the Lange bramas plug ouer the {Evoat needle valve and add on asubtract height by using various thickness washers under the needfe vafue. The washers ane available in the gasket khit. Porsche Mailonder manufactures the quages. 1{ you spend a day tuning your carbs you‘ve gained experience and patience. tou have afso changed the shape of your knees. Treat the needfe seats wmith respect recause they can‘t be repfaced. When adjusting the mixture screus remember that ‘hey can afl be a Zlitile fean, on they can all be a Zlittle rich, but they should e one wayon the other. T Almays check for mater in the fue?l system. Protect your investment! The carburetors should be checked for percolation in the ffoat bowfs agter the igine is thoroughly heated and car is allowed to ait. I1f this condition exists, id it is not due to too high of float Level or presaure in the gos tank, the 914—6 exolic insulators Ahoukd be placed under the intake manifgolds. The part number 4s: 1—108—131—00. They have to be opened—up for cars with a Larger than 32mmport 22. A variety of these inaulators are available from PORSCHE HATLORDER. PORSCHE MATLORDER m 135—17th St. _ Eoul SANTA MONICA, CA9040? ' {213) 393—5423

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Document Created: 2005-09-01 12:42:27
Document Modified: 2005-09-01 12:42:27

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