Nitrous Express Water Methanol Stage 2 User Manual

Page 5

NO3 Prong To 12V Key-
On Power

Pump

Low Fluid LED

Injection Status LED

Air Flow

Throttle Plate

+12 Volt Key On

Engine Ground

Wire Connection

Boost

Switch

Red

20A Fuse

White

Black

Yellow

Boost Line To Engine
Boost Source

Green

Red Wire To
COM Prong

Black

To Battery Positive (+)

Level Switch

Red

•

Road test vehicle and adjust FULL dial until a smooth power curve is felt with no misfi ring. Often the full

dial can be set lower than the max output of the MAF for more cooling. If any bucking or bogging is experienced,
increase the full point until it is eliminated. If bucking is felt at the onset of injection, increase the start point.

Controller Operation Example

For setting 1, left, the chart shows the Start dial at 2 volts and the Full dial at 4 volts. At 2 volts from the MAF,
the pump will operate at 10%. At 4 volts from the MAF, the pump will deliver 100% of injection pressure.

For MAF voltage readings between the Start and Full settings, the controller will linearly adjust the pump out-
put as shown on the graph. Note the chart on the controller itself. This shows what settings are associated with
particular voltages and HZ values for the various modes available.
Example:
In most applications, the start dial should initially be set at the 12:00 position, so that typical airfl ow levels in
normal driving do not trigger injection needlessly. The full dial should be all the way to the clockwise position.
Start tuning by carefully trying lower start point settings. If bogging is experienced at the onset of injection,
move the start dial back up a small amount. Then try lower and lower points for the full setting. If bogging is
experienced as injection ramps up, turn the full point back up to a safe level. The engine should run with no
bogging or miss-fi res. Be sure to make small changes and then test them each time to avoid any drastic differ-
ences in injection.

100

2.5

3.5

4.5

Mass Air Flow (MAF) Sensor Voltage

Start

Pump Output %

Full