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2.6 Fuel and Nitrous Supply Connection
Remove both 1/8" NPT steel plugs from the included Earls Fuel Tap.
1.
2.
Apply a small amount of PTFE thread sealant to the NPT threads of ONE of the plugs and reinstall.
Apply a small amount of PTFE thread sealant to the NPT threads of the 90° 1/8"NPT to -4AN fitting and install it in the remaining
3.
port on the Fuel Tap as shown. Use a bench vise to tighten the fitting at least 1-1/2 turns after finger tight. See picture below for
orientation.
4.
Install the fuel feed line to the fitting installed in step 3. Use a bench vise to tighten the fitting.
WARNING! Fuel in the fuel system remains under high pressure even after the engine is shut off. Before working on or
disconnecting any of the fuel lines or fuel system components, the fuel pressure must be relieved. Failure to
follow these instructions may result in personal injury.
5.
Once residual fuel pressure is relieved, place clean rags under fuel rail feed line connector and disconnect by lifting the blue safety
latch and pulling the lines apart. There may still be residual fuel in the lines.
Gently remove the OEM fuel supply line from the support clip on top of the driver's-side valve cover, rotate the clip 180° and
6.
reinsert the fuel line.
7.
Install the Earls fuel tap between the fuel rail and the fuel feed line with the red fuel fitting pointing away from the firewall and install
the redundant safety clip as shown.
8.
Connect the fuel feed line coming from the fuel tap to the nitrous plate fuel fitting and tighten. If installing this line to the fuel tap
after step 7, be sure to support the fitting to keep from breaking the fuel rail.
9.
Plumb your nitrous supply line from the bottle to the blue 90° fitting, IN side of the nitrous solenoid being careful not to pinch the
line or allow any abrasion from moving parts in the vehicle or exposure to excessive heat.
2.7 Electrical System
Refer to Figure 13 and the procedures in this section for electrical system installation.
WARNING! Death or injury may occur from working on a charged electrical system.
1.
Disconnect the ground cable from the battery.
2.
Install the NOS arming switch in the vehicle's interior, within easy reach of the driver, and route the provided red and black wires
from the switch to the power distribution box on passenger's side of the engine bay.
Install the relay in the engine compartment so the relay connector's orange wire will reach the battery (+) terminal located at the
3.
front of the main fuse/relay box.
4.
Install the NOS 2-stage mini progressive controller in the engine compartment near the main fuse/relay box and route the white
wire to the master arming switch in the vehicle interior. This is also a good time to route the USB cable into the interior if desired.
5.
Connect the orange relay wire (with fuse) to the battery (+) terminal located at the front of the main relay/fuse box.
6.
Connect one wire from each solenoid together with the large blue wire from the mini 2-stage progressive controller, using one of
the provided Posi-Twist connectors (see assembly diagram on page 11).
7.
Join the remaining two solenoid wires to the smaller blue wire coming from the relay harness using the other Posi-Twist connector.
8.
Connect the green relay wire to a good chassis ground.
10
Earl's Fuel Tap
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