Quick Fuel Technology SUPER STREET SERIES CARBURETORS User Manual

QUICK FUEL TECHNOLOGY®

Installation Instructions

HOT ROD SERIES CARBURETORS

SLAYER SERIES CARBURETORS

SUPER STREET SERIES CARBURETORS

HR-580-VS 580 CFM Vac. Secondary ! ! ! SS-680-VS 680 CFM Vac. Secondary HR-680-VS 680 CFM Vac. Secondary ! ! ! SS-735-VS 735 CFM Vac. Secondary HR-780-VS 780 CFM Vac. Secondary ! ! ! SS-780-VS 780 CFM Vac. Secondary HR-600 600 CFM Mech. Secondary ! ! ! SS-880-VS 880 CFM Vac. Secondary HR-650 650 CFM Mech. Secondary ! ! ! SS-650 650 CFM Mech. Secondary HR-750 750 CFM Mech. Secondary ! ! ! SS-750 750 CFM Mech. Secondary HR-850 850 CFM Mech. Secondary ! ! ! SS-650-AN 650 CFM Mech.Secondary SS-650-E85 650 CFM Mech. Sec. ! ! ! SS-750-AN 750 CFM Mech. Secondary SS-750-E85 750 CFM Mech. Sec. ! ! ! SS-830 830 CFM Mech. Secondary SS-850 850 CFM Mech. Secondary ! ! ! SL-600-VS 600 CFM Vac. Secondary

SL-750-VS 750 CFM Vacuum Secondary

Please Stop and Read these Instructions before proceeding. If you do not fully

understand the installation and tuning instructions you should seek professional

help. Failure to follow the proper installation and tuning may result in damage or

injury.

Quick Fuel Technology®

129 Dishman Lane

Bowling Green, KY 42101

270-793-0900

www.quickfueltechnology.com

Quick Fuel Technology would like to congratulate and thank you for purchasing this carburetor. We feel you have purchased the ﬁnest street performance carburetor currently on the market. If you need assistance please call the QFT Sales and Tech Support staff @ 270-793-0900, Monday through Friday 8AM – 5PM central time.

This QFT™ carburetor has been ran on an engine to insure all components are functional. The calibration should be very close for all adjustments. Different engine combinations could require adjustment of idle mixture, idle speed and main jets. The fuel level was set with 6 ½ lbs. of fuel pressure. The recommended fuel pressure for this carburetor is 6 ½ PSI.

Note: This QFT™ carburetor has not been submitted for emission testing, therefore it is not C.A.R.B. (California Air Resources Board) legal in all 50 states - please check with local authorities regarding the use of this carburetor.

Warning: There are several manufacturers that produce quality components to facilitate the use of kickdown on the Hot Rod Series Carburetors with an overdrive transmission. Please insure you have the proper hardware before using this carburetor and that it is installed per the manufacturers speciﬁcations.

Remove old carburetor:

1. Disconnect negative battery terminal to prevent any accidental arcing in the presence of fuel.

2. Remove air cleaner, PCV hose and any other vacuum lines connected to the carburetor. For future reference identify

the vacuum lines to ensure proper re-connection.

3. Remove fuel line(s)…be careful not to twist fuel line(s) when removing fuel inlet ﬁtting(s), use penetrating oil or similar chemical to assist in breaking the fuel inlet ﬁtting nut loose. Protect the open ends of the fuel lines, so no foreign particles can enter.

4. Disconnect electric choke wires if equipped (identify if necessary).

5. Disconnect all linkage and return springs.

6. Remove the 4 hold down nuts and washers (if used).

7. Remove carburetor from intake manifold.

8. Cover intake manifold carburetor ﬂange with a clean rag or towel to prevent any foreign objects from falling into the

engine.

Installation of New Carburetor

1. Set old carburetor and new carburetor side-by-side on work bench.

2. Examine linkage connection (throttle cable [rod] and kickdown cable [if applicable]) transfer to new carburetor in same location if possible.

3. Install ﬂange gasket over intake manifold studs on intake manifold, then install your new carburetor. Install throttle cable bracket on driverʼs side rear stud if applicable.

4. Install hold down nuts and washers (if used), tighten in a criss-cross pattern DO NOT TIGHTEN HOLD DOWN NUTS COMPLETELY.

5. Attach throttle and kickdown linkage then operate from inside the vehicle to be certain there is no interference of throttle plates, throttle linkage, accelerator pump arms or fast idle cam lever.

6. If there is no interference or resistance in throttle operation then you can tighten the hold down nuts to their ﬁnal torque value, 100 Inch Lbs. (8 Ft. Lbs.). Most intake manifold studs are a ﬁne thread and therefore tightening the hold down nuts must be tightened in a criss cross pattern and in a number of steps before arriving at the ﬁnal torque value. Rapidly tightening the hold down nuts to the ﬁnal torque spec or over-tightening will cause performance problems as this process can warp or potentially break the throttle body.

7. Install vacuum hoses. The PCV hose is installed on the rear 3/8” tube at the rear of the throttle body. This tube can also accommodate power brake hose connection as well if PCV is either not used or is routed to a different location on the engine. It is not advisable to “T” the PCV and power brake hose together. These two lines should be separated. If the PCV was originally attached to the carburetor it should be installed the same way on your new carburetor. The power brake hose must be attached then it should be routed to another vacuum connection in the intake manifold. This connection should be to the plenum of the intake manifold, not an individual intake runner. Vacuum connections to the new carburetor as shown below:

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