Carburetor Instruction Sheets PDF Print E-mail

This is a complete instruction sheet for the Carburetor kits.

BEFORE ANY WORK BEGINS DISCONNECT THE BATTERY. ALWAYS USE EXTREME CAUTION AND CARE WHEN WORKING AROUND FUEL SYSTEMS. DO NOT SMOKE. USE JACK STANDS WHEN WORKING UNDER ANY VEHICLE.

Mounting the nitrous bottle

Mount the nitrous bottle with the tall bracket at the top of the bottle and the short bracket at the bottom. Position the bottle in the trunk/hatch to one side of the car with the valve end facing the bottle. (If it is necessary to mount the bottle sideways, keep the bottle valve up and turned slightly to the back of the car). Check under the car in the area where the bottle is to be mounted for any fuel or electrical wires. (DO NOT DRILL INTO THE GAS TANK OR ELECTRICAL LINES). Mark and drill (4) 3/8" holes and bolt the bottle to the floor of the trunk.

Supply Line Installation

Drill a 5/8" hole below the bottle valve or locate a drain plug grommet in the area of the bottle valve and route the supply line under the car. Be sure to tape up the ends of the line to avoid any trash or dirt getting in the line. Route the supply line along the chassis away from any moving parts or exhaust heat, routing along the brake lines is the most common area, wire tying along the way. Finish routing the supply line under the hood away from the exhaust manifold and any electrical wires. Leave a little slack in the line to allow for engine movement. Mount the nitrous filter keeping in mind the direction of flow noted on the filter toward the motor. Install the 1' line to the outlet side of the filter and connect it to the "IN" side of the nitrous solenoid.

Mounting your Nitrous plate

NOTE: BEFORE REMOVING YOUR CARBURETOR, MAKE A NOTE OF ALL LINKAGE, HOSE AND ELECTRICAL CONNECTIONS FOR REFERENCE WHEN REINSTALLING CARBURETOR.

Remove the four bolts attaching the carburetor to the manifold. Carefully remove carburetor and clean gasket material from both carburetor and manifold surface. If you purchased the Holley Plate Kit (Part #550100), install the four carburetor studs at this time. Place a gasket on the intake and then the nitrous plate with the word "top" facing up. If you are using a quadrajet or Spreadbore carburetor, the small bores in the plate go toward the front of the car and the longer bolts supplied in the kit will be used. Replace the carburetor and all hoses and linkage in the reverse order as in step one.

Modifying your fuel system

There are two methods of supplying fuel to your nitrous system. The first method is for 175HP or less. The second method is for 175HP and above.

Method 1

Find a suitable location (away from fan, pulleys, belts, exhaust heat and moving suspension parts) to splice into the fuel line and add a fuel tee. Attach a rubber fuel line between the new fuel tee and nitrous system fuel solenoid. Make sure you use hose clamps on all fuel line connections and that they are tight.

Method 2

On high horsepower systems, a major problem is inadequate fuel supply to handle both the carburetor system and the nitrous system. On large systems your fuel demands may more than double! These competition units require high output fuel systems, including a high flow electric fuel pump accompanied by a fuel pressure regulator. Systems below 250 horsepower will operate with a minimum fuel line inner diameter of 3/8". Nitrous systems providing an increase around 250 horsepower or higher, it is recommended to use a separate fuel system for both your carburetor and your nitrous system.

Connecting the solenoids to the plate

If you purchased a 5400 series plate system, the solenoids will mount directly to the plate. When mounting the solenoids to the plate, use a non hardening pipe sealant. (DO NOT USE TEFLON TAPE). The gas solenoid is marked with a "G" on the base and attaches to the end of the plate marked N2O. Use a back up wrench on the fittings in the plate to avoid turning the spray bars and disrupting the spray pattern. On the 5400 series plates this procedure should be done before mounting the plate under the carburetor.

If you purchased a 5500, 5600, or 5700 plate system, first select the horsepower level you wish to run and insert the gas jet in the end of the plate marked "GAS" and the same for the nitrous. Follow the preceding steps to complete this section of the installation:

1. Attach the 2 steel lines with the blue fittings to the plate to hold the jets into the plate.

2. If necessary, mark and cut the steel lines if clearance is a problem. Be sure to debur the ends. Try to keep the lines close to the same length.

3. Screw the (2) 3/16" compression fittings into the outlet sides of both solenoids using pipe sealant. ( DO NOT USE TEFLON TAPE). Install the 3/8" barb fitting into the inlet side of the GAS solenoid on the 5500 series. The 5600 and 5700 series use a 1/8" to #6 fitting for your fuel hook up. Install the 1/8" to #4 fitting into the nitrous solenoid. Use pipe dope on these fittings.

4. Slide the compression end of the solenoids onto the corresponding ends of the plate; gas to gas and nitrous to nitrous. Tighten the compression fittings on to the steel lines but do not over tighten.

5. Remove tape from your supply line and anchor the end of the line. Turn your bottle on for 3 seconds to clear any trash that may have gotten into the line. Hook your nitrous supply line up immediately after doing this to your nitrous solenoid.

6. Hook your fuel supply line to your gas solenoid and tighten the hose clamp.

Electrical Wiring

Your 12 volt source should be taken from the fuse panel marked "accessory" , this will ensure the nitrous cannot be activated with the engine off. On high horsepower racing systems more amperage is required and the 12 volt source should be taken directly from the battery using 12 gauge wire. Take one wire from each solenoid and ground to the engine block. Take the remaining two wires and run them inside the car to one terminal on your push button switch. Run a wire from the other terminal of your push button to one terminal on your toggle switch. From the other terminal on your toggle switch run a wire to the fuse panel.