Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on July 14, 1983.
As of Thursday, December 26th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
32/34 DFT1972-1973 Datsun 610 1700cc, L-18 1973-1974 Datsun 710, 620 P/U 1700cc, L-18 1973-1976 Datsun 610 1952cc, L-20 1974-1976 Datsun 710, 620 P/U 1952cc, L-20BCDD disconnected and EGR delay valve installed

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

D-133 Document:

CARB_D-133

{Page 1 of 2) State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—133 Relating to Exemptions under Section 27156 of the Yehicle Code REDLINE, INC., A SUBSIDIARY OF IMPAC WEBER CARBURETOR MODEL 32/34 DFT s 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 32/34 DFT carburetor manufactured by Weber Carburetor has been found not to reduce the effectiveness of required motor vehicle poliution control devices and, therefore, is exempt from the prohibitions of Section 27156 of the Veh1c1e Code for the vehicles listed below: Year Make ~ Mode? Engine Desc. 72—73 Datsun 610 1700cc, L—18 73—74 ~— Datsun 710 1700cc, L—18 = 73—74 Datsun 620 Pick—Up 1700cc, L—18 73—76 Datsun 610 1952cc, L—20 74—76 Datsun mo 1952cc, L—20 74—76 Datsun 620 Pick—Up 1952cc, L—20 This Executive Order is valid provided that installation instructions for this device will not recommend tuning the vehicle to specifications different from those submi‘tted 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.

REDLINE, INC. 290 EXECUTIVE ORDER D—133 (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—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE WEBER 32/34 DFT CARBURETOR. 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 poliution control device as a certified device which, in fact, is not a cert1f1ed 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. Executed at El Monte, California, this 2 day of Ju 83. 7 K. D. Drachand, Chief Mobile Source Control Division

STATE OF CALIFORNIA AIR RESOURCES BOARD EVALUATION OF THE MODEL 32/34 DFT WEBER CARBURETOR FOR EXEMPTION FROM THE PROHIBITIONS OF VEKHICLE CODE SECTION 27156 JUNE, 1983

EVALUATION OF THE MODEL 32/34 DFT WEBER CARBURETOR FOR EXEMPTION FROM THE PROHIBITIONS OF VEKHICLE CODE SECTION 27156 by Mobile Source Control 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 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 model 32/34 DFT carburetor. Comparative exhaust emission and bench flow tests demonstrate that the aftermarket Weber carburetor model 32/34 DFT does not adversely affect emissions. Based on the results of the tests and the Board‘s evaluation of the model 32/34 DFT, the staff recommends that the exemption be granted for the vehicles as requested.

CONTENTS Page Number SUMMARY i. CONTENTS 11. I. INTRODUCTION 1. II. CONCLUSIONS III. RECOMMENDATIONS IV¥. DEVICE DESCRIPTION ¥. EVALUATION PROGRAM ¥I. DISCUSSION 11.

EVALUATION OF THE MODEL 32/34 DFT WEBER CARBURETOR FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE SECTION 27156 1. INTRODUCTION Redline, Inc. of Torrance, California, a subsidiary of Imported Parts and Accessories Corporation (IMPAC), is a distributor of Italian—made Weber Carburetors and has applied for exemption from the prohibitions of Vehicle Code Section 27156 for a single aftermarket carburetor designated as the Weber model 32/34 DFT. Exemption is sought as a replacement carburetor for the O.E.M. Hitachi 340 carburetor as found on lTimited 1972—1976 Datsun (Nissan)} vehicles equipped with either the L18 or L20 engines. This report describes the evaluation of the Weber 32/34 DFT carburetor and its findings. II. CONCLUSIONS Comparative exhaust emission data submitted by the applicant demonstrated that the Weber model 32/34 DFT carburetor has the same Tow emission characteristics as that of a properly performing Hitachi 340 carburetor. The applicant also submitted air flow curves of the model 32/34 DFT and its EGR flow curves to demonstrate that the Weber aftermarket carburetor functions in a like manner as the Hitachi counterpart. The Weber replacement carburetor is designed simply to replace the existing carburetor without any modifications and the stock air cleaner housing is retained. The idle mixture screw has a lTimiting adjustment cap to prevent tampering as does the OEM carburetor.

III. RECOMMENDATIONS Based on the submitted comparative data, the staff recommends that Redline, Inc. be granted limited exemption from the prohibitions of Vehicle Coae Section 27156 for the Weber aftermarket carburetor model 32/34 DFT for the years, make, and models listed below: Years _Make_ Models Engine Description 72—73 Datsun 610 1700 cc, L—18 73—74 Datsun 710 1700 cc, L—18 73—74 Datsun 620 Pick—Up 1700 cc, L—18 73—76 Datsun 610 1952 cc, L—20 74—76 Datsun 710 1952 cc, L—20 74—76 Datsun 620 Pick—Up 1952 cc, L—20 IV. DEVICE DESCRIPTION Both the Weber 32/34 DFT and Hitachi 340 carburetors are progressive two—barrei down draft designs (see exploded view, Photo 1). The main differences between the carburetors are the manner in which the secondary throttle is activated and the choke butterflies. The Weber 32/34 DFT uses a manually—operated secondary which starts to open after approximately 40° of primary throttle opening and uses twin choke butterflies, one for each venturi. The Hitachi 340, however, uses a vacuum operated secondary which can be opened after 50° of primary throttle opening and the corresponding manifold vacuum and a single choke butterfly only over the primary venturi. The Hitachi 340 uses a Boost Controlled Deceleration Device {BCDD) to enrich the air/fuel mixture during decelerations. However, when the Weber 32/34 DFT is installed the BCDD and its controlling components are no longer retained.

V. EVALUATION PROGRAK The applicant performed comparative CVS—75 exhaust emission tests at Import Certification Lab in Anaheim, California. A 1976 Datsun 710 equipped with a L—20 (1952 cc) engine and four—speed manual transmission was used. v During the evaluation, testing was performed on both a prototype carburetor and a representative production carburetor to show that the exhaust emission levels would not be adversely affected by the Weber 32/34 DFT‘s use. The baseline test with the Hitachi 340 carburetor was performed to show that the. stock vehicle was in proper working order and that emissions of the vehicle were within the applicable state standard for the 1976 model—year. The applicant‘s submitted comparative exhaust emission and derived fuel economy data is given in Table 1. Table 1 Applicant‘s Comparative Test Data Exhaust Emissions gm/mi Fuel Economy mi/gal Condition HC CO NOx City Basel ine 0.8 4.6 2.2 18.8 Prototype Weber 0.8 8.9 1.9 19.1 Production Weber 0.9 4.8 1.8 19.4 Re—Run of . Proquction Weber 0.9 5.1 1. 7 19.6 1976 P/C Std. 0.9 9.0 2.0 — The applicant also submitted comparative bench air flow data (Graph 1) and comparative bench EGR flow data (Graph 2) for the Weber 32/34 DFT and Hitachi 340 carburetors. The Board did not perform confirmatory testing of the Weber 32/34 DFT for this evaluation.

VI. DISCUSSION The applicant‘s submitted comparative emission and bench test data is generally acceptable. Although there are some differences in which the two carburetors operate, the Weber 32/34 DFT does not seem to adversely affect exhaust emissions. The submitted emission test data does not reveal any significant increases and the smail differences are considered, by staff, to be within the lTimits of testing variability. The submitted bench flow data reveals that the Weber 32/34 DFT is slightly Jeaner {1 A/F ratio) at W.0.T. than the Hitachi 340. However, since the change in A/F ratio is during the rich operation of the carburetor, the change would not adversely affect NOx or HC emissions. The bench data also reveals a greater EGR port strength with the Weber 32/34 DFT. In order to prevent a driveability problem and possible emission increases with the early induction of recycled exhaust gas, a 1.0 to 1.5 second ¢e1ay valve is installed in series between the carburetor and the EGR valve. The delay valve does not change the strength of the signal but only prevents the EGR vaive from opening early. The staff plotted the EGR flow vs. port strength curves and found them to be within 20%. The emission data of the production carburetor was performed with the delay valve installed. The absence of the BCDD on the Weber 32/34 DFT did not seem to affect emissions even though the CVS—75 test contains more than twenty acceleration and deceleration modes. Driveability was not evaluated during the testing of the Weber 32/34 DFT. However, if driveability was adversely impaired, emissions would have more than likely increased.

Since the instaillation of the Weber 32/34 DFT is a simple remove—and—replace arrangement and no special adapters, other than the one for the air cleaner, are needed, the staff does not believe that improper installation or tampering would be encouraged. The idle mixture screw is pre—adjusted and then sealed preventing the installer from changing the proquction limits of the carburetor. Although the test data of the Weber 32/34 DFT reveals it to be functionally similar with regard to emissions to the Hitachi 340, it cannot be classified as an Aftermarket Replacement Part as differences are found in the bench air flow data, the carburetor choke and power circuits, and the absence of the BCDD system.

‘rgluse Weber 32/34 DFT Hatacht 340 main popo{dx3 1 oroud

INSTALLATION INSTRUCTIONS Who. WEBER caneurerons READ & UNDERSTAND ALL STEPS OF THESE INSTRUCTIONS BEFORE BEGINNING THIS INSTALLATION. AFTER UNPACKING, EXAMINE THE CARBURETOR AND OTHER COMPONENTS FOR SHIPPING DAMAGE. DATSUN 610, 620, AND 710 1972 To 1976 L18 and L20B Engines, All Transmissions For Kit Nos. K 8640 and 52—50514 (Pickup) K8650 and 52—50512 (Sedan) TOOLS AND EQUIPMENT NEEDED PARTS SUPPLIED WITH INSTALLATION KIT: Combination, Box or Open—End Wrenches 1 — Weber 32/34 DFT CArburetor (metric) Socket Set with 12mm Socket 1 — Air Filter Adaptor Screwdrivers (regular and Phillips) Pliers 1 — Fuel Line Gasket Scraper Wiping Rags 1 — Hardware Kit Cleaning Solvent Knife Gasket Sealer TUNE—UP SPECIFICATIONS ‘ Al tune—up specifications for the Weber Carburetor remain the same as those specified by the Datsun Factory for the original unit. Emissions tune—up should be carried out by a suitably qualified Dealer or Independent garage, using infrared gas analyzing equip— ment. NOTE: Late model vehicles fitted with Emission Control Systems have many vacuum lines 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 source of each line. This kit is sold under the provisions of Califormia Air Resources Board Executive Order No. D—133 (C.A.R.B. E.0. No. D—133). Products with C.A.R.B. E.0. numbers are exempt from the prohibitions of Section 27156 of the California Vehicle Code. Performance kits so noted are legal for use on public highways in California. C.A.R.B. E.O. No. D—133 is valid for Datsun: 610, 620, 710 (72—76) fitted with L18, or L20B engines. WEBER U.S. Page 1

PREPARATION FOR KIT INSTALLATION. CAM COVER HOT AIR TUBE 1. Remove the vehicle gas cap. 2. Raise the hood and disconnect the vehicle battery. 3. Remove the fuel line and clamps. 4. Remove the two air filter bracket bolts at the front of the air filter. 5. Disconnect the following lines from the air filter. Identify removed lines GULP VALVE AIR Pump to aid in reassembly. See figure 1. EVAPORATIVE CANISTER a. Gulp Valve MANIFOLD VACUUM b. Cam Cover c. Hot Air Tube d. Air Pump Figure 1 e. Manifold Vacuum f. Evaporative Canister EGR VACUUM BCDD VACUUM 6. Remove the air filter from the vehicle. 7. Disconnect the following carburetor lines and wires. Identify removed lines and wires to aid in reassembly. See figure 2. a. EGR (Exhaust Gas Recirculation}) Vacuum b. BCDD (Boost Control Deceler— ation Device) Vacuum c. Red Anti—Dieseling, Idle Cutoff Solenoid Wire d. Blue Choke Wire HIGH ALT. VAC. LINES e. White BCDD Wire f. Vacuum Advance to Distributor WHITE BCDD WIRE vACUUM ADVANCE BLUE WIRE NOTE: Some vehicles have altitude com— TO DISTRIBUTOR RED WIRE pensation devices which have two (2) vacuum lines connecting the carburetor Figure 2 with a unit mounted on— the left inner fender, behind the BCDD unit. These lines may be discarded. See figures 2 8. Remove cotter pin, spring, and wash— and 3. The BCDD electrical wire will er from the carburetor linkage arm. not be used on the Weber Carburetor On vehicles with cable throttle linkage, and should be disconnected and discarded. remove the cable from the throttle quad— rant. Page 2

9. Remove carburetor flange nuts and lift carburetor and flange gasket from the intake manifold. 10. Remove the four flange studs from the intake manifold. NOTE: Flange studs are removed with a stud removal/installation tool or by a double—nut procedure. (Two nuts are threaded on stud to be removed and locked tightly together. The stud can then be unscrewed from the manifold). 11. After the flange studs are removed, clean the manifold face. KIT INSTALLATION. 12. Use stud removal/installation tool or the double—nut procedure and install the new flange studs supplied in the kit, in the manifold flange. 13. Install the smaller of the two gaskets supplied on the manifold flange. 14. Install the plastic <insulator block, supplied in kit, on the manifold. Place the remaining gasket on the insulator block. NOTE: The insulator block has a tapered hole which must match the original man— ifold at the bottom, and the carburetor at the top. 15. Remove one—way air valve and hose. Fit spacer and threaded adaptor as shown in figure 4. Shorten the air hose 1—1/2 inches. Refit hose and valve assembly as shown. If necessary, reposition air valve for clearance with choke solenoid. 16. Install Weber carburetor on manifold with choke assembly toward the front of the vehicle. See figure 5. 17. Secure carburetor with flange nuts SPACER ONE—WAY AIR VALVE and washers supplied in the kit. NOTE: THIS ILLUSTRATIGN SHOWS THE WEBER CARBURETOR INSTALLED. 18. Reconnect throttle arm with cotter pin, spring, and washer removed in step No. 8. On vehicles with cable throttle Figure 4 linkage, connect cable to throttle quad— rant on Weber carburetor. Page 3

19. Reconnect blue electric choke wire and red idle cutoff solenoid wire to corresponding units on the Weber carb— uretor. See figure 6. 20. Connect the fue!l hose supplied in the kit from the stock Datsun fuel outlet to fuel inlet on the Weber carburetor. Secure hose with clamps supplied. See figure 6. 21. Counect the EGR and Vacuum Ad— vance lines with the EGR line nearest the firewall and the Vacuum Advance line toward the front of the vehicle. See figure 6. 22. Install the black and gold vacuum delay valve supplied in the kit in the vacuum line that connects the EGR Figure 5 valve to the thermal switch. Install the vacuum delay valve by cutting a 1/2— IDLE CUTOFF SOLENOTD CHOKE inch piece out of the vacuum line and installing the delay valve in the line. Install the delay vaive with the black side toward the thermal switch and the gold side toward the EGR vaive. 23. Reconnect the lines removed in steps Sa through 5f to the air cleaner. See figure 1. 24. Install the air cleaner adaptor and FUEL air cleaner with the two oval air filter INLET spacers supplied and the two air filter vAcuum bracket bolts removed in step 4. FUEL HOSE ADVANCE LINE 25. Tighten the two bracket bolts to STOCK secure the air filter. EGR LINE FUEL ouTLET 26. Reconnect the vehicle battery. Figure 6 27. Depress the throttle fully, then release to initiate the cold—start device. 28. START THE ENGINE. After warmup at Weber factory. Refer to Tune—Up check for leaks around the carburetor Specifications on page 1. mounting base and correct as necessary. With engine idling, use a spray can of 30. CHECK FOR ADEQUATE HOOD carburetor cleaner with hose attachment CLEARANCE BEFORE CLOSING THE to isolate a leak. Spray cleaner around HOOD. carburetor mounting base. If any of the spray is entering the induction sys— NOTE: If difficulties arise during kit tem, the idle speed will change. installation WEBER U.S. will make every effort to provide needed assistance. 29. Check idle speed and adjust as nec— Contact our technical liaison through essary to 750 rpm. Idle mixture is preset your distributor for this assistance. wWEBER U.S. 445.8650.IN Page 4


Document Created: 2005-09-01 12:44:49
Document Modified: 2005-09-01 12:44:49

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