Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on May 8, 1985.
As of Thursday, December 26th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
32/36 DGV 5A1970-1973 Datsun 240Z, 1974 Datsun 260ZBCDD disconnected, OEM AC replaced with open type AC and EGR delay valve installed on 73-74 vehicles

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-133-3
  • Executive Order 133-3 / D133-3
  • ARB # D-133-3
  • Executive Order No: D-133-3
  • C.A.R.B. No. D-133-3
  • Resolution D-133-3
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-133-3 PDF

D-133-3 Document:

CARB_D-133-3

{Page 1 of 2) State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—133—3 Relating to Exemptions under Section 27156 of the Vehicle Code REDLINE, INC., A SUBSIDIARY OF IMbAC REDLINE CARBURETOR EXCHANGE KIT USING WEBER MODEL 32/36 DGY 5A CARBURETORS 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—45—5; IT 1S ORDERED AND RESQOLVED: That the installation of the Redline Carburetor Exchange Kit No. K8688 using two (2) Weber 32/36 DGY 5A carburetors has been fsund 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 the vehicles listed below: Redline Weber Year Make Model Kit No. Carburetor 1970—1973 Datsun 2402 K8688 32/36 DGY 5A 1974 Datsun 2607 K8688 32/36 DGV 5A 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 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 prohibited unless prior approval is obtained from the Air Resources Board. Exemption of a kit shall not be construed as an exemption to sell, offer for sale, or advertise any component of a kit as an individual device. 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.

REDLINE, INC. EXECUTIVE ORDER D—133—3 {Page 2 of 2) THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESQURCES BOARD OF ANY CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE REDLINE CARBURETOR EXCHANGE KIT NO. K86ss. 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 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 poliution 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 will be submitted to the Attorney General of California for such action as he deems advisable. cforniac Executed at El Monte, California, this tnie & day of M%iffii;f; »fMbA K. D. Drachand, Chief Mobile Source Division

State of California AIR RESOURCES BOARD EVALUATION OF THE REDLINE CARBURETOR EXCHANGE KIT NO. K8688 USING MODEL 32/36 DGV 5A WEBER CARBURETORS FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13 OF THE CALIFORNIA ADMINISTRATIVE CODE APRIL, 1985

EVALUATION OF THE REDLINE CARBURETOR EXCHANGE KIT NO. K8688 USING MODEL 32/36 DGV 5A WEBER CARBURETORS FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE 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 El 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 commerical products constitute endorsement or recommendation for use.)

SUMMARY Redline, Inc., a distributor of Italian made Weber carburetors, has applied for exemption from the prohibitions of Vehicle Code Section 27156 for the Redline Carburetor Exchange Kit No. K8688 using two (2) Weber model 32/36 DGV 5A carburetors. The Redline Carburetor Exchange Kit replaces the original equipment Hitachi carburetors on 1970—74 Datsun 24072/2602 model vehicles. The carburetor dashpot, hot air intake and deceleration device are not retained in the Redline Kit installation. A delay valve is added in the exhaust gas recirculation valve vacuum control line for the 1973 and 1974 model—year vehicles which use exhaust gas recirculation systems. Exhaust gas recirculation was not used on 1970—1972 model—year vehicles. Due to space limitations the original equipment air cleaner cannot be accommodated. The Redline Carburetor Exchange Kit utilizes an open type air cleaner. Comparative exhaust and evaporative emission tests demonstrate that the aftermarket Redline Carburetor Exchange Kit using Weber model 32/36 DGV 5A carburetors does not adversely affect emissions. Based on the results of the tests and the evaluation of the Redline Carburetor Exchange Kit, the staff recommends that the exemption be granted as requested for the Datsun 1970—1973 model—year 2407 model and the 1974 model—year 2607 model vehicles.

CONTENTS Page Number SUMMARY CONTENTS I. INTRODUCTION I1I. CONCLUSIONS III. RECOMMENDATIONS IV. DEVICE DESCRIPTION V. EVALUATION PROGRAM VI. DISCUSSION APPENDIX Carburetor Diagrams A—1 11.

EVALUATION OF THE REDLINE CARBURETOR EXCHANGE KIT NO. K8688 USING MODEL 32/36 DGV 5A WEBER CARBURETORS FOR EXEMPTION FROM THE PROHIBITIONS OF YEHICLE CODE SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13 OF THE CALIFORNIA ADMINISTRATIVE CODE I. INTRODUCTION Redline, Inc. of Torrance, California, a subsidiary of Imported Parts and Accessories Corporation {IMPAC), is a distributor of Italian—made Weber carburetors. The company has applied for exemption from the prohibitions of Vehicle Code Section 27156 for a Carburetor Exchange Kit designated as Redline Kit No. K8688 utilizing two (2) Weber model 32/36 DGV 5A carburetors. The Carburetor Exchange Kit is designed to replace the original equipment manufacturer (OEM) Hitachi HJG46W and HMB46W carburetors as found on 1970—1974 Datsun (Nissan) 2407 and 260Z vehicles equipped with 146 and 156.5 cubic inch displacement (CID) engines. This report describes the evaluation of the Redline Carburetor Exchange Kit and the findings. I1I. CONCLUSIONS Comparative exhaust emission data and other information submitted by the applicant demonstrated that the Redline kit using two (2) Weber model 32/36 DGY 5A carburetors meets the Air Resources Board {ARB) requirements for exemption from the prohibitions of Vehicle Code Section 27156. 111. RECOMMENDATIONS Based on the submitted comparative data of the Redline Carburetor Exchange Kit, the staff recommends that Redline, Inc. be granted exemption from the prohibitions of Vehicle Code Section 27156 for the Redline Carburebor Exchange Kit No. K8688 using two (2) model 32/36 DGV 5A Weber carburetors for the years, make, and models of vehicles listed below:

Year(s) Make Mode] Engine Description 1970—1973 Datsun 24072 146 CID 1974 Datsun 2607 156.5 CID IV. DEVICE DESCRIPTION The Redline Carburebor Exchange Kit No. K8688 uses two Weber Model 32/36 DGY 5¥ carburetors to replace the two OEM Hitachi Model HJG46W or HMB4GW carburetors. The HJGA46W carburetor is used on 1970—1972 vehicles and the HMB4GW is used on the 1973—1974 vehicles. The Hitachi carburetor is a single barrel sidedraft carburetor; its venturi area is automatically changed according to engine air intake. The amount of fuel passing through the main jet is governed by a tapered needle. A power valve is provided to improve performance during acceleration from medium speed. A choke valve and auxiliary nozzle is used for cold starting. Main components of the carburetor consist of: a float chamber, suction chamber, suction piston, piston damper, metering needle and jet, throttle valve body, power valve, choke valve and auxiliary nozzle. The two Hitachi carburetor models are similar in design. The newer model HMB46W has provision for exhaust gas recirculation (EGR) and refined fuel metering valve for improved emissions control. EGR was not utilized in the 1970—1972 model—years. The Weber 32/36 DGV 5A carburetor is a progressive two—barrel down draft design (see Appendix A). The Weber carburetor uses a mechanically—operated secondary which starts to open after the primary throttle opens approximately 68 percent. The Hitachi HMB4GW carburetor on 1974 model—year vehicles uses a boost controlled deceleration device (BCDD) to slow throttle closing to control the

air/fuel mixture during decelerations. Earlier model—year vehicles have similar throttle closing systems but they were not specifically designated as BCCD systems. When the Weber 32/36 DGY 5A carburetors are installed, the throttle closing devices are no longer retained. The Weber installation does not retain the Hitachi carburetor dashpot, hot idle compensator, or hot air intake. A delay valve is added in the EGR valve vacuum control line for 1973—1974 Datsuns. This valve acts to smooth out the application of the vacuum signal during transient conditions. It has no effect during steady throttle conditions. Due to space limitations the OEM air cleaner unit cannot be accommodated. The Redline Carburetor Exchange Kit utilizes an "open" type air cleaner. V. EVALUATION PROGRAM A. METHOD The applicant performed comparative CVS—75 exhaust emission and evaporative emission tests at Import Certification Laboratories {ICL) in Anaheim, California. A 1974 Datsun 260Z equipped with a 156.5 CID engine and 4—speed manual transmission was used. The baseline test was performed with the Hitachi HMB4GW carburetor. A representative production Redline Kit was used for the comparative testing. Confirmatory testing was conducted at the ARB Haagen—Smit Laboratory on a second 1974 Datsun 2607. A 1974 model—year vehicle was used as the test vehicle since vehicles of this model—year were required to meet a more stringent NOx standard. It would be expected that vehicles of previous model—years would meet the respective emissions standards using the same Redline Kit.

Evaporative emissions testing was conducted to evaluate any emission changes which might result from the use of the open type air cleaner. The carbon—trap procedure was used for testing at ICL. This was the evaporative emission test procedure applicable to 1977 and older model—year vehicles. The testing at the Haagen—Smit Laboratory was conducted using the Sealed Housing Evaporative Determination (SHED) procedure which has been utilized for evaporative emission testing commencing with the 1978 model—year. The introduction of this procedure made the carbon—trap method obsolete. B. TEST RESULTS The applicant‘s submitted comparative exhaust emission and evaporative emission data are given in Table 1. Table 1 Emission Test Data Carbon Trap Exhaust Emissions Fuel Economy Evaporative HC CO NOx City Emissions Condition gm/mi mi/gal gm/test Baseline 6.5 68.5 1.4 13.6 0.5 Redline Kit 2.2 25.5 1.2 16.2 0.67 1974 Passenger Car 3.2 39 2.0 —— 2.0 Standards Confirmatory test results are contained in Table 2. Table 2 Emission Test Data SHED Exhaust Emissions Fuel Economy Evaporative HC CO NOx City Emissions Condition ga/mi mi/gal gm/test Baseline 5.3 58.3 1.3 14.9 10.7 Redline Kit 3.1 39.4 1.3 14.4 9.0 1974 Passenger Car 3.2 39 2.0 —— —— Standards 2 4 —

VI. DISCUSSION The applicant‘s submitted comparative emission test data are generally acceptable. The vehicle baseline exhaust emissions for hydrocarbons and carbon monoxide exceeded standards by a factor of approximately two. The exhaust emissions of the test vehicle with the Redline Kit No. K8688 are lower than the baseline emissions with the OEM carburetors; they are also below the 1974 emission standards. There was a 0.17 gram/test increase in evaporative emissions but the 0.67 gram/test level is well below the 2.0 gram/test standard. During the confirmatory testing at the ARB laboratory, the idie mixture setting procedure specified in the submitted Redline installation instructions was used for adjusting the Weber carburetors on the test vehicle. The Redline instructions specified that the vehicle manufacturer‘s procedure was to be used to set the idle mixture. The vehicle manufacturer‘s instructions specify setting the mixture at 1,400 rpm engine speed to 1.3% + 0.3% carbon monoxide without air injection. The mixture was then to be checked at idle engine speed with air injection. The carbon monoxide level should be less than 2.7%. The idle mixture setting of the test vehicle as set by using the above procedure was very lean (hydrocarbons — 0.13 ppm). The vehicle stalled on the first acceleration and did not restart within the specified limit of one minute. Subsequently, Redline submitted revised idle mixture setting instructions. These instructions reflected the method Redline had used during its test program. The idle mixture is set at idle engine speed to 2.0 + 0.3% carbon monoxide with air injection. The test vehicle was reset using the revised procedure and retested. The vehicle, however, experienced difficult

start and stalling problems again. As a result, another retest was conducted following the same revised idle mixture setting procedure. This time there was a less severe starting problem and time limits for starting and accelerations were not exceeded. The above tests were run using the original Redline Kit manual choke starting procedure: "Pull choke lever back 1/2 way. Pump the accelerator pedal 2 full times. Start engine." To alleviate the potential driveability problem exhibited during the above tests, Redline changed to the following starting procedure: "Cold Start Pump the accelerator pedal two full times. Beginning with 2/3 choke lever travel, adjust as needed to achieve proper cold start. Start engine. As soon as practical disengage choke lever. Hot Start Depress the accelerator pedal 1/2 way to the floor and hold at this point. Start engine. Choke should remain disengaged." The staff is of the opinion that these changes in the starting procedure should not cause the emissions to increase ({see Table 2) from HC/CO of 3.1/39 grams per mile to the extent that the baseline emissions HC/CO of 5.3/58 grams per mile would be exceeded. The absence of the BCDD with the carburetor exchange did not seem to affect emissions even though the CYS—75 test contains more than 20 deceleration modes. (The oxides of nitrogen emissions did not increase). The confirmatory evaporative emissions test conducted by the ARB laboratory utilized the SHED procedure which has been used for conducting evaporative emissions tests commencing with the 1978 model—year. Although — 6 ~

there are no specific evaporative emissions standards for 1974 model—year vehicles using the SHED procedure, the back—to—back test indicated an evaporative emissions decrease with the Redline kit installed. The Redline Carburetor Exchange Kit is identified as Kit No. K8688. The kit uses the same Weber Model 32/36 DGY 5A carburetors to replace the Hitachi HJG4GW and HMB4GW carburetors for the specified vehicle models. The OEM throttle actuation arrangements for the different Hitachi carburetors vary in the various vehicle models. The Redline kit supplies hardware including control rods, left and right rod ends and a throttle control bell crank to allow the throttle linkage for all vehicle models to function with the Weber éarburetors in a manner similar to the OEM Hitachi carburetors.

APPENDIX A Air—fuel mixture from Damper Rod / rear carburetor m—1 Oil \ Damper | VX_\J Vacuum \ ‘ M Choke Yalve 1 diess . & Air & Air | & @a# Airduel mixture & Main Nozzle t l =*}L Jet Needie hfi\ Auxiliary Nozzle For Starting 3SM215 _ Flooat Chamber HITACHI $.U. TYPE CARBURETOR (SECTIONAL VIEW) A—1

TYPICAL VIEW 32/36 DGV REDLINE INC. The Weber Importers A—2

GRAPH 1 _A/F COMPARISON 10 _ 1P _ Ouvyy 1/¥ n ¥¥o 4¥ GG &8 a» PB a8" #xaa . . a=«. . « ---- . -- . ---- . -- . --- ail CYH L Uitachi OCH 340 Yienrinse— ui JT1LG¥HL NJd4O 3QIM 134¥d Revised Weber 32/34 DFT 9A .. wwsmmm Exempteo Weber 32734 DFT @azmumer® | esmm man ns prvomemmmme 200 300 AIR Frow —(KG/MIN)

INSTALLATION INSTRUCTIONS W READ & UNDERSTAND ALL STEPS OF THESE INSTRUCTIONS BEFORE BEGINNING THIS INSTALLATION. After unpacking, examine the carburetor and other components for shipping damage. If any damage is found, notify shipper/supplier immediately. DATSUN 240, 260Z (1970—1974) For Kit Nos. K8688, 52—50510 Using (2) Weber 32/36 DGV—5A TOOLS AND EQUIPMENT PARTS SUPPLIED WITH NEEDED: INSTALLATION KIT Combination, box or open end wrenches 1 — Hardware Kit (metric and standard) 2 — Weber 32/36 DGV—5A Carburetors Socket set with 12 mm socket 2 — Carburetor Adapters Screwariver (regular and Phillips) 2 — Air Filter Assemblies Pliers Gasket Scraper Rags NOTE: Obtain a new fuel filter Cleaning Solvent and install it when Knife . installing this kit. TUNE—UP SPECIFICATIONS All tune—up specifications for the Weber Carburetor remain the same as those specified by the Factory EXCEPT FOR IDLE MIXTURE SETTING. Refer to the Information Tag supplied in this kit labeled "Engine Tune—Up Specifications" for idle mixture setting. Emissions tune—up should be carried out by a suitably qualified Dealer or Independent garage, using infrared gas analyzing equipment. N TE: Late model vehicles fitted with Emission Control Systems have many vacuum fines and electrical connections in their fuel systems. It is essential when dismantling that disconnected lines be identified with a corresponding number tag or label system. To establish function, locate and identify the sourceof each line. 1. Remove the vehicle‘s gas cap. 4. 1973—74 Vehicles Only: Remove the radiator cap and drain the engine‘s coolant 2. Disconnect the battery. . system. Remove the coolant hoses that run _ to the base of the stock carburetor. (Fig. A). 3. Disconnectand remove the factory airfilter CAUTION: Be sure engine is cold when assembly. performing this step to avoid possible in— juries from hot water. R COOLANT E.0. N No. D—133—3 C.AR.B. E.0. aistona of California Air Resources Board Executive Order No. D—133—3 (C.AR.B. This is sold under the provisions nmon Vehicl e Code. the prohibitions of Section 27156 of the California Products with C.AR.B. E.0. numbers are exempt from Performan ce kits so noted are legal for use on public highways in California. WEBER DISTRIBUTI N

5. Disconnect and remove the stock fuel 12. Rotate the throttle linkage at the firewal! hoses. Plug the fuel lines. 180°. (Fig. D) 6. Disconnect the servo—diaphragm from the 13. (A) Install the throttle operating rod. — throttle linkage and remove it from the in— plied in the kit, through the existis take manifold. Retain the boits for use later. holes and lock it into the stock linkay~ (Fig. B) from the firewall. (Fig. D) 7. Disconnect and remove the Opener Con— (B) 1973 Vehicles Only: Thestock linkage trol Valve assembly. (Fig. B) ., balls myst be removed from the bel! crank assembly to adapt Weber throt— tle operating rod. Linkage balls are riveted on belil crank and must be drilled out to be removed. THROTTLE LINKAGE PIVOT NEAR ; center / /0 —_— «_ $r0. 2CKk B OF FiRE / [ —_ w ~ —2arsy, N Pus, WALL / ~— «n ~—"Hes 1 _2 _ VALVE SERVO OPENER FIG. B DIAPHRAGM CONTROL BELL CRANK PIVOT vaLve ON LEFT siDe or mal FIRE WALL Q FIG. D 8. Disconnectthe choke cables from the stock carburetors. 14. BENCH ASSEMBLY: Install the cartg tor mounting studs in the adapters usit ~ 9. Disconnect the intermediate throttle rod the thread locking compound supplied. from the auxiliary throttle shaft assembly. the proper stud tool is not available, the Remove the screw from the throttle linkage "double—nut" method can be used. ( Take 2 sleeve and slide out this assembly. (Fig. C) nuts and lock them together 1/3 the way down the stud using a suitable wrench on THROTTLE LINKAGE AUXILIARY SLEEVE THROTTLE the top nut, tighten the stud into the mani— SHAFT fold.) Do Not Over Tighten Studs. SERVO DIAPHRAGM INTERMEDIATE THROTTLE ROD 15. Remove the rags from the stock intake ports and install the carburetor adapters using the gaskets supplied in the kit. Use the original carburetor nuts to secure the carburetor adapters in place. (Fig. E) FIG. C 10. Remove the four (4) nuts securing each carburetor to the intake manifold and re— tain for use later. Remove the carburetors and linkage parts as one unit. 11. Insert a clean rag into the manifoid ports to prevent debris from entering the engine. Clean the mounting surface thoroughly with a gasket scraper.

16. Install the Weber carburetors on the 22. Bypass the stock Idle Speed Screw (1.S.S.) adapters using the carburetor flange gas— on the intake manifold (located next to kets provided. (NOTE: Carburetor throttle EGR valve) by intalling a piece of hose on linkage should be facing the firewall.) Se— the vacuum fitting directly beilow the 1.S.S. cure the carburetors in place using the nuts and connecting it to the 1.S.S. base. provided. Tighten each nut in small incre— Use some clamps from the kit to secure the ments using a criss—cross pattern (/eft— hose in place. (Fig. F) front, right—rear . . . ) Do Not Over Tighten Nuts. 23. Connect the distributor vacuum advance hose to the port on the front carburetor. 17. Install the carburetor linkage rods to the NOTE: 1974 model vehicles should tee—in throttle operating rod. Do not connect them the charcoal canister to this port. to the carburetors at this time. Connect the choke cables to the carburetors. 24. Before installing the air filter bases on the carburetors, remove the knock out plugs 18. Install the support bracket for the throttle and install the elbow fittings. (Fig. G) operating rod where the Servo—Diaphragm was originally mounted. Use the original 25. Install the second vacuum delay valve from bolits from the diaphragm to secure the sup— the kit in the vacuum line for the Anti— port bracket. (Fig. F) Backfire Vaive. NOTE: Black Side of Delay Valve Must Face Towards the Anti—Backfire 19. 1973—74 Vehicles: Reconnect the coolant Valve. (Fig. G). circulation system using the hose and clamps provided in the kit. Do Not Retfill the Radiator At This Time. 20. Install the vacuum delay valve in the EGR vacuum hose. NOTE: The gold side of the delay valve must face towards the EGR Valve. 21. Remove theplugs from the stock fuel lines and install the new fuel hoses to the carbu— retors using the clamps from the kit to secure them. A new fuel filter should be installed at this time. SPARK ADVANCE ANTI—BACKFIRE VALVEQ‘\ A/ (1974 mopeLs must TEE CHARCOAL SUPPORT IDLE FIG. G rower C CANISTER TO THIS BRACKET MOUNTS sPEED EGR BRAKES PoRT} HERE SCREW VALVE THROTTLE 26. Install the Crankcase Vent, Air Pump, and OPERATING Anti—Backfire Vaive hoses to the correct air MANIFOLD filter base location as shown in Fig. G. Bolt VACUUM the filter bases to the carburetors using the hardware provided. Install the filters and tops and secure them using the cap nuts provided. Refill the radiator and replace the radiator cap. Reconnect the battery and replace the gas cap. Turn "out" the idle speed screw on each carburetor until the tip of the screw is flush with casting (Fig. H). Check for binding or sticking of the throttle plates (with the idie speed screw turned out, the throttle plates should be completely closed in the bores). Correct any misalignment or binding before proceeding.

IDLE SPEED SCREW 39. Check for adequate hood clearance before closing hood. 40. Manual Choke Starting Procedure: Cold Start Pump the accelerator pedal 2 full times. Beginning with 2/3 choke lever travel, ad— just as needed to achieve proper cold start. Start engine. As soon as practical disen— gage choke lever. IDLE MIXTURE SCREW Hot Start Depress the accelerator pedal 1/2 way to 30. Turn "in" the idle speed screw until the tip the floor and hold at this point. Start of the screw just touches the carburetor engine. Choke should remain disengaged. lever. From this "contact" point turn the idle speed screw "in" one (1) full turn. Set each carburetor in this manner. This is your preliminary set point. CARBURETOR SYNCHROMETER 31. Install a Redline Syncrometer, or other relti— An extraordinary—new able carburetor syncrometer, according to calibration instrument the manufacturer‘s directions. that even works on multi— barrel, progressive 32. Start the engine (CAUTION: Besureloose carburetors. throttle rods are not interfering with other EASY TO READ linkage components). A large, easy to read face, numberically cali— brated in kilograms—per—hour delivers fast, preci— 33. To syncronize the carburetors, adjust each sion air flow measurement for all types of carbu— idle speed screw until a balanced reading retors, regardless of position. is obtained on the Syncrometer. SECRETS IN THE SLEEVE After the carburetors have been syncron— The secret to the success of Synchrometer is . ized, install the throttle linkage rods on the rubber sleeve that fits directly into the carbure— carburetor levers. Ensure the carburetor tor air horn. You get a positive airtight seal. All levers have not moved from their preset incoming air must pass through the Synchrom— position. If the linkage rod tength is incor— eter. Best of all, special adapters let you service rect, loosen the right and left handed nuts irregular and multiple venturi carburetors. and turn the rod shaft to shorten or leng— TWO MODELS then as needed. When correctly adjusted Type $SK—primarily designed for small to the syncrometer reading will remain as medium displacement engines that flow a low originally set in step #33. When tuning is volume of air through the carburetor in a single complete lock the rod nuts in place. or multiple intake systems. Calibration range is: 1 to 30 kg/h. Part No. STE SK 35. Adjust the idle speed to the Factory Speci— fied RPM by turning the idle speed screws in the appropriate direction. Turn each SPECIAL ADAPTORS screw equally. Recheck the linkage rod All special adaptors are designed to fit tightly in position if screws are adjusted. the carburetor intakes. This feature allows you to have both hands free for tuning and makes 36. Using an infrared exhaust gas analyzer the use of multiple instruments possible. adjust the Idle mixture screws to obtain a Model Adaptor reading of 2.0% + 0.3% with Air Injection. 32736 DFAV Series STE 49 37. Apply the "Tune—Up Specifications" decal 32736 DGV Series STE 40 34 ICT STE 54+8 supplied in the kit next to the original 40 DCN STE 18 "Tune—Up Specifications" decal. 40, 42, 44 DCNF STE 118 40, 44, 48 IDF STE 118 38. Check for free throttle operation and cor— 40, 42, 45, 48 DCOE STE 118 48 IDA STE 18 rect, if necessary, before starting engine. 50, 55 DCO/SP W/SK STE 10 Start engine and check for fuel and vacuum 50, 55 DGO/SP W/BK Not Rea‘d leaks. WEBER U.S. 3/85 445.86881N


Document Created: 2005-09-01 12:40:23
Document Modified: 2005-09-01 12:40:23

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