CARBURETOR P/N 0-80457S (electric choke) P/N 0-1850S (manual choke) INSTALLATION, TUNING, AND ADJUSTMENT MANUAL 199R11081 NOTE: These instructions must be read and fully understood before beginning installation. If this manual is not fully understood, installation should not be attempted. Failure to follow these instructions, including the pictures may result in subsequent system failure.
TABLE OF CONTENTS: INTRODUCTION: ........................................................................................................................ 2 REMOVAL: .................................................................................................................................. 3 INSTALLATION: ......................................................................................................................... 3 ELECTRIC CHOKE MODELS: .....................................................
REMOVAL: 1. Remove the air cleaner, exercising care to carefully detach any vacuum lines from the air cleaner and marking them so they can be reassembled to the air cleaner in the same manner. 2. Remove the existing carburetor by the following procedure: A. Carefully disconnect the fuel line. WARNING: Carefully protect the open end of the fuel lines, so that no foreign particles can enter. Wrap the end of the fuel line with a clean lint-free cloth. B. C. D. E. F. 3.
Figure 2a. Figure 2b. Manual choke parts (0-1850 shown) 6. Reconnect the appropriate vacuum hoses to the carburetor, noting the correct fitting from Figure 2a and Figure 3. Replace any cracked or dry rotted hoses at this time to prevent any vacuum leaks. A. B. C. The full manifold vacuum source in the front of the throttle body provides vacuum for proper operation of the air cleaner, the pump diverter valve (if equipped), AC/Cruise, and/or the temperature sensing valve.
Figure 3 9. In some cases, the existing fuel line will have to be cut and connected to a “dual feed” fuel line with a length of rubber fuel hose and a clamp. WARNING: During the fuel line installation, DO NOT allow any foreign particles to enter the fuel lines, which could then cause flooding and may result in a fire. WARNING: Keep the fuel line away from the EGR valve (if equipped) on the intake manifold. If installation requires cutting the metal fuel line, cut the fuel line with a good tube cutter.
10. Start the engine and check the fuel lines and inlet fitting for possible leaks. NOTE: The recommended fuel pressure is 5-7 psi. Use an adjustable fuel pressure regulator (Holley® P/N 12-803) if it is higher than 7 psi. 11. Recheck to assure all existing vacuum hoses are attached properly. Plug any fittings not used. 12. With the engine at operating temperature, set the idle speed to the manufacturer’s specifications (see page 12 for idle adjustment). 13.
Figure 4—Chrysler applications FORD APPLICATIONS: WARNING: This carburetor is not designed for use with any Ford automatic overdrive transmission. SEVERE transmission damage may result from improper application use. NOTE: Unless replacing an existing Holley® Carburetor, you may need to purchase Holley® P/N 20-91, spring and perch kit, for Ford automatic transmissions. 1.
WARNING: On automatic transmission vehicles only, install the transmission kickdown adjustment screw and black retaining clip, as correctly indicated. Failure to attend to this detail may result in a sticking wide-open throttle or dangerous uncontrolled engine speed. Connecting the Transmission Linkage: GM TH350, 200R4 /700R4 Attach the transmission kickdown stud (supplied) into the proper hole location on the throttle lever as seen in (Figure 7).
Figure 8 FUEL LEVEL: (Float Level) – for Adjustable Needle & Seat Equipped Bowls: 0-80457S & 0-1850S: Figure 9 The float(s) controls the fuel delivery, however if the float(s) are not properly adjusted a fuel starvation or a flooding affect could result. This operation is difficult to do accurately on a rough-idling vehicle. 1. Mechanical fuel pump, remove coil wire and crank engine over for 10 seconds to allow fuel bowls to fill. This procedure can prevent a power valve blow out.
Figure 10 5. Tighten the lock screw while holding the adjustment nut. 6. Replace the sight plug and finger tighten. 7. Flush the fuel bowl by revving the engine a few times with the transmission in the neutral. 8. Remove the sight plug to confirm your setting. A slight trickle should be seen at the threads. Adjust, if necessary. 9. Replace the sight plug and tighten. IDLE MIXTURE NEEDLES: Idle mixture needles control the air/fuel mixture at idle.
Figure 14 ROUGH IDLE AND VACUUM LEAKS: If a rough idle persists after the engine has been started and the mixture screws adjusted, check for manifold vacuum leaks. These could result from unplugged vacuum fittings or a carburetor flange gasket that was torn during installation. Recheck for proper attachment of all vacuum lines and check the lines for cracks. If the manifold was changed, a manifold vacuum leak could occur at the cylinder head/manifold surface due to damaged gaskets or improper torquing.
Figure 15 3. Figure 16 Remove the clip retaining the diaphragm plunger to the secondary throttle lever using a small flat-blade screwdriver (Figure 17). Figure 17 Figure 18 4. Remove the four screws securing diaphragm cover. 5. Gently remove the cover. Take care as not to tear the diaphragm or loose the check ball (Figure 18). NOTE: Your secondary housing may have a brass restriction inserted where the check ball should be.
Figure 19 JETTING (MAIN JETS): Due to varied applications that a universal performance carburetor will work with, a few tips on jetting are provided to help you understand their purpose. 1. Out of the box jetting is extremely close for most applications. 2. Carburetors are calibrated at 70 at sea level. Decrease the jet size primary and secondary, one number for every 2000 ft. increase in altitude. 3. Holley® jets are broached, flowed, and stamped according to flow rate.
HOLLEY STREET WARRIOR™ WARRANTY All Holley Performance Products Limited Warranties are extended to the original consumer only. This Limited Warranty is not assignable or otherwise transferable. There are no warranties that extend beyond those stated herein. Holley Performance Products offers no other warranties expressed or implied beyond this Limited Warranty.
