EFI INSTRUCTION SHEET FOR 5.0 AND 4.6 MUSTANGS
- This is the complete instruction sheet for the 5.0 and 4.6 Mustang kits.
first INSTRUCTION ON ALL KITS:
always USE EXTREME CAUTION AND CARE WHEN WORKING AROUND FUEL SYSTEMS. disconnect THE BATTERY BEFORE STARTING ANY WORK. USE JACK STANDS WHEN WORKING ON THE VEHICLE.
The 5.0 liter has a perfect place to tap in for your Compucar system fuel supply. There is a diagnostic test port on the fuel supply rail. Check the list below for best location.
1986 Ford Mustang...on the passenger side fuel rail close to the firewall.
Late 1986, 1987 to 1993...behind the alternator on the fuel supply line.
1994..on the fuel rail to the passenger side of the distributor.
By using the diagnostic port, it eliminates any need to splice into any of the stock fuel lines.
Modifying your fuel test port
The test port fitting must be removed. This is accomplished by turning the fitting counterclockwise until it comes out.
Locate the nitrous hardware a straight brass fitting with the same thread size on one end, as the test port fitting just removed.
Using a form of liquid thread sealer (NOT TEFLON TAPE), install the brass fitting provided in the kit into the fuel test port. DO NOT OVER TIGHTEN!
Installation Blaster Injector Nozzle
The Blaster Nozzle may be located on either side of the throttle body. Normal recommendation though is to locate the nozzle in the rubber AIR TUBE 1 1/2 inches directly before the hose clamp at a 9 o'clock level. Once the location has been decided, drill a 1/4" hole for the nozzle . Look in the kit and find the 3" ring. To install the ring, slip the ring inside the rubber boot and align it with your hole. Insert the Blaster Nozzle and tighten, make sure the output of the nozzle is pointing toward the throttle body.
Choosing your systems horsepower
In your kit is a package with jets and a jet card. Choosing the horsepower setting you wish to use and install each carefully in the Blaster Nozzle. Make sure you install the nitrous jet into the port in the nozzle marked "N" and the gas jet in the port marked "G". DO NOT USE SEALANT ON THE JETS!
Mounting the solenoids and installing output lines
The solenoids in the kit may appear to be the same but they are different. Each solenoid is stamped on the bottom with a "N" for nitrous or "G" for gas. You will notice there are 4 fittings remaining in the kit, install 2 of the large fittings into the gas/nitrous solenoids "IN" openings using pipe sealant. DO NOT USE TEFLON TAPE). Mount the solenoids to the mounting bracket. Install the 2 small fittings into the nitrous/gas solenoids "OUT" openings using pipe sealant. Mount the solenoid to the mounting bracket.
Install the 16" #3 lines to each outlet fitting of the solenoids, attach the other ends to the Blaster Nozzle jets. Be sure to attach the nitrous solenoid to the nitrous jet and the gas solenoid to the gas jets. Refer to the jet card for the nitrous jet and gas jet needed for each horsepower setting.
Attach the 2' #4 line to the fuel test port fitting previously installed and the "inlet" port of the gas solenoid. Mount the solenoid bracket to the chassis. ( We have found the strut tower to be a good location).
Mounting the bottle
Slip the two mounting brackets onto the bottle with the taller bracket toward the front of the bottle and place the unit in its mounting position. This is usually the trunk area, but wherever you mount it, you MUST have access to the bottle valve, hose connections, and bracket wing nuts to facilitate bottle changing. Using the holes in the bracket bases as a template, mark and drill four holes to secure the mounting brackets.
Supply line installation
Locate and drill a 5/8" diameter hole near the bottle valve in the sub flooring. Tape up the end of your supply line and run it under the car being sure to keep the line away from any moving suspension parts or the exhaust system. Wire tie the supply line to the bottom of the car to keep it from dragging on the ground. Securely fasten the AN nut on the line to the bottle valve adapter. You may also want to use some silicone or a split grommet to keep the line from chaffing where it goes through the sub flooring.
Installation of the nitrous supply line to the nitrous solenoid
Before installing the main nitrous line, BLOW IT OT BY OPENING THE VALVE FOR 2 SECONDS. This removes any foreign matter that may be in the line. Install the nitrous filter, noting direction of flow to the nitrous line, Next install the 1' #4 line to the outlet side of the nitrous filter. BLOW THE LINE AGAIN! Tighten the main supply line onto the nitrous solenoid inlet marked "IN".
IMPORTANT SAFETY NOTICE!
WHEN BLOWING OUT THE NITROUS LINE, ANCHOR THE LOOSE END SO IT WILL NOT WHIP AROUND, AND STAY CLEAR! THE EXTREME COLD AND HIGH PRESSURE BLAST EMITTED FROM THE OPEN END OF THE LINE CAN CAUSE BODILY HARM AND SEVERE FROST BITE!
Your 12 volt source is taken from the fuse panel at a point that is "HOT" only when the ignition is on. This will ensure the nitrous system can be activated only when the switch is in the "ON" position. Be sure all connections are well insulated to avoid possible shorting out any wires. Locate the black pull switch in the kit. The large clamp connects to the u-shaped tube on the air conditioning line located on the passenger side firewall . Now locate in your kit a length of ball chain, look at your throttle body, underneath you will see the throttle control. The control has a hole with a rubber grommet, remove the rubber grommet insert the ball chain through the hole and run it through the looped end of the wide open switch spring. Connect the ball chain together. IF THE CHAIN IS TOO LONG IT CAN BE SHORTENED BY CUTTING BETWEEN THE BALLS. BE CAREFUL NOT TO CUT THE CHAIN TO SHORT!
Using the wiring kit supplied, run the wire through the firewall near the drivers side kick panel. Pull back the rubber boot on the throttle switch. you will notice 2 holes, back the 2 screws out on top of the switch. Insert the wiring coming from the fire wall into one of the holes and tighten the screw down on top of the wire. Pull back any access wire back into the drivers compartment.