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Infiniti G35 Track Upgrade: Nitrous Injection System From "Tricked Out" episode DTRK-408

(Continued from page 2)

Spark Plugs, Nitrous System Completion and Install Purge Kit

To alleviate the problem of detonation, Andrew installs a set of cooler spark plugs, which will keep the cylinders cool as heat increases inside the combustion chambers because of the nitrous blasts. He completes the nitrous injection system install, and then installs a purge kit, which will allow the driver to expel any expended nitrous gas in the fuel line.

Materials and tools for this phase of the project:

standard shop tools
set of cooler spark plugs
drill with bits
purge kit
marker
tubing bender
spit loom
electrical extensions, if needed
soldering equipment, if needed
heat shrink tubing, if needed

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Solenoids

Replace Spark Plugs

Any time you boost a car's performance with a turbo, supercharger or nitrous, you're increasing heat inside the combustion chambers, which can lead to detonation. You'll know it's happening when you hear a pinging or knocking sound. Detonation is a big problem because when the engine misfires parts of your car can break. To make sure this doesn't happen to the project car, Andrew installs a new set of spark plugs that have a colder heat range inside the engine.

The plugs have a shorter ceramic insulation underneath the firing tip. The new plugs should transfer some of the increased heat through the plug, which will keep the cylinders cools.

Complete Nitrous Injection System Install

Now that the plugs are in, it's time to install the parts and begin putting the car back together.

• With the intake pipe temporarily back in place, estimate the best places to mount the solenoids.

• Hold up a rubber grommet to mark a heat shield where the nitrous line and wiring will pass through.

• Drill a hole in the compartment wall, using tape to mark the bit so you'll know when you're deep enough.

• Install the 1" grommet to protect the lines and wiring.

• Reconnect the intake tube.

• Run the nitrous line through the grommet, and replace the rubber strip to complete the install.

	Fuel line
	Loomed wires
	Firewall grommet
	Fuel line

Install Purge Kit

Now it's time to install the purge kit. The purge port is located on the main solenoid on the right side.

• Remove the factory plug, and connect the two solenoids with the coupling that comes in the kit.

• Mount the fuel solenoid on the engine in a position where the fuel supply line will reach the high-pressure factory fueling line that runs from the fuel filter to the engine.

• Once the solenoids are hooked up, disconnect the battery.

• Now it's time to cut the fuel line, which is held in place by a bracket. Unscrew the bracket and remove the vacuum hose to allow for a little more working room.

• Cut the fuel line, and slide worm clamps onto each side.

• The cut ends go into the T-fitting, and the fuel solenoid line connects to the top.

• Tighten down the connections and the clamps, and reconnect the vacuum line.

• Once the fuel system is ready to go, it's time to install the purge line.

• The purge line will go through the wiper cowl, but the line will have to be bent in order to fit.

• Using a marker and a tubing bender, make a series of bends so the purge line wraps around and through the cowl.

• Drill a hole in the cowl so it fits over the line, and then cut off the excess.

• For the project car, the fuel, purge and nitrous electrical lines aren't long enough, so Andrew solders on some extensions and protects the connections with heat shrink tubing to make them water tight.

• Wrap everything in split loom, cut a hole in the factory firewall grommet, and feed the lines through to the inside of the car.

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