Nitrous Express Water Methanol Stage 3 User Manual
Page 4
Installation – Electrical
Variable Controller Installation
The Stage 3 controller has an integrated wiring harness for ease of install and a clean appearance. Refer to the
main wiring diagram (pg.7) and listing below for installation.
CAUTION: Disconnect the negative battery terminal while connecting wires to prevent electrical fi re or dam-
age to controller.
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Connect BLACK wire to a good ground location.
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Tie GREEN wire out of the way.
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Connect RED wire to a 12 volt key on power source. When selecting a power source look for a dedicat-
ed circuit that you can tie into before the fuse. The controller is internally fused. A good source is the cigarette
lighter. Use the provided rocker switch, which is numbered, position 1 is 12VDC key on source, position 2 is
power to controller, position 3 is bronze is a ground.
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Connect the two BLUE wires to the two wires leading to a fuel injector using the provided wire splices,
DO NOT SOLDER THESE CONNECTIONS. Any injector will suffi ce, so choose one that is easy to access. In
carbureted applications, these leads can simply tied out of the way.
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Connect the clear tubing to the black silicone line. This line can be ‘T’ed into any accurate manifold
boost pressure source. A boost gauge line that is tapped into the intake manifold is ideal. In naturally aspirated
applications, this can simply be tied out of the way.
•
Connect the WHITE wire to the red power wire of the pump. The BLACK wire on the pump goes to a
good chassis ground.
Always have a good electrical ground connection. Poor ground will result in erratic operation of controller or
damage. Make sure boost connection is AFTER the throttle body.
Tuning the Stage 3 System
The Stage 3 system allows for a large range of tuning on any EFI or forced induction vehicle. It can reference
fuel injector pulse-width, boost, or both simultaneously. The boost and EFI data are displayed on the LCD
screen, along with the systems output as a percentage of pump capability.
All functions of the controller are accessed using the two push buttons to the left and right of the LCD screen.
Pressing button 1 will scroll between screens, while pressing button 2 will affect whatever setting is on the
screen.