Mallory Ignition ACCEL DIGITAL NITROUS PROCESSOR 74186 User Manual
Page 6
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ACCEL/DFI TECHNICAL SUPPORT 248.380.2780
6
INSTALLATION – HOW TO
Start by locating a spot in the passenger compartment (Recommended) to mount the NO2 Processor. Keep it away from any moisture
spots and from any area where it can be damaged by the passengers. DO NOT install it in an area where it can get very hot, the
internal components require good ventilation.
1. Mount Processor
2. Drill hole through fire wall (Check Grommet Center OD for correct drill size) directly behind engine. Install rubber grommet. (Keep
hole away from exhaust headers)
3. Pull harness through fire wall, (Do Not Plug Harness in processor at This Time).
4. Run the wires to their components in the engine compartment, (Example: NO2 Solenoid Wires, 6A CD Box, Battery + -, MAG Trigger.)
5. Using wire chart on page 8 and figure 1 through 9 on pages 09 -17, hook up processor to vehicle components.
6. After all wiring and installations are done; plug all connectors together at the Processor.
NO2 Acc. Harness
8 Pin Connector
Wire Color
Pin A = RPM input (Points)
White
Trigger Signal Input
Pin B = NOT Used
Pin C = High Speed Retard
Yellow
Requires 12V+ Input
Pin D = Spark Trigger RPM Out
DK Blue
To CD Box (Accel/DFI 6A)
Pin E = NO2 Enable (0-20 Volt+)
Gray
To Micro Switch or TPS
Pin F = Sensor Return (TPS)
Gray/Red
To TPS Sensor Return
Pin G = RPM Switch Out (Ground)
Orange
Example: Shift Light ground
Pin H = Master Arm Input 12V+
Blue/Pink
NO2 Arming Switch 12V+
NO2 Power Harness
4 Pin Connector
Pin A = Ignition 12 Volt Batt+
Red
To + 12 Battery
Pin B = Ground
Black
To - Battery
Pin C = Tach Output
LT Green
To Tach Input
Pin D = AUX RPM Input 12V+
Green/White
To trans brake +12 button
NO2 MAG Pickup Harness
2 Pin Connector
Pin 1 = MAG + Pickup
Purple
Distributor IPU +
Pin 2 = MAG – Pickup
Green
Distributor IPU -
NO2 Stage 1
2 Pin Black Connector (Note: 25 AMPS MAX Rating per Solenoid)
Pin A = Stage 1 Fuel Out (Ground)
White/Red
To Fuel Solenoid Ground
Pin B = Stage 1 NO2 Out (Ground)
White/Blue
To Nitrous Solenoid Ground
SINGLE STAGE INPUT/OUTPUT DIAGRAM FOR ACCEL/DFI DIGITAL NO2 PROCESSOR
SYSTEM VOLTAGE SPECS
Voltage Operating Range: 12 to 16 Volts
Nitrous Solenoid Grounds: 25 AMPS Maximum for 15 Seconds
Fuel Solenoid Grounds: 25 AMPS Maximum for 15 Seconds
Systems enable inputs: 12 Volts