Step 4: Install Injectors and Delivery Lines
1. Remove the intake manifold. Note: It is
recommended that you purchase a new intake
manifold gasket for reassembly.
2. Using a 11/32 dia. drill bit, drill each intake runner
where you would like to position the nitrous nozzles.
3. Use the 1/8 NPT tap that is included with the kit to
tap the holes you have just drilled in the intake
runners. Take special care to not tap the holes too
deep. It is recommended to tap a few turns at a time,
back the tap out, clean out the shavings, and test fit the
nozzle to the NPT threaded hole. When all four holes
have been tapped, thoroughly clean and blow out all
shavings from the inside of the intake manifold.
4. Using a liquid thread locking compound on the
threads, install the nozzles in the threaded holes.
Make sure the nozzles are pointing in the correct
direction. The outlets should face toward the
cylinder head.
5. Reinstall the intake manifold, using a new intake
manifold gasket.
6. Assemble the distribution blocks and lines (Fig.
5).
7
. Install the jets for both fuel and nitrous
in the nitrous injector nozzles (fig. 6).
8. Attach the fuel and nitrous distribution
lines to the nitrous nozzles. Be sure to use
a 3/8in. wrench to hold the jet fitting as you
are tightening the 7/16 swivel nut on the
distribution lines.
9. Assemble the –4AN inlet filter fittings
and the –3AN outlet fittings into the fuel
and nitrous solenoids. Make sure you use a
liquid thread sealant on all NPT pipe
threads. Attach the solenoid brackets to the
solenoids using the pan head allen screws
and find a suitable mounting location for
them.
10. Insert the correct jets in the fuel and nitrous jet holders in the distribution blocks (fig. 6).
Fig. 4
RED = FUEL
PURPLE = NITROUS
Fig. 5
Fig. 6
Distribution Lines
Jet Fitting
Distribution Block
(Fuel & Nitrous)
Jet
Fuel Line From
Solenoid
Jet Fitting
Feed Line From
Fuel Dist. Block
Jet
Nitrous Nozzle
Jet
Feed Line From
Nitrous Dist. Block
