Holley VR2 - Fuel Pump Wiring Configurations

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ELECTRICAL RATING:
Input Operating Voltage
7Vdc – 30Vdc
Input Constant Current Max
20A
Over Current Protection
25A, inline 25A fuse
Reverse Battery Protection
Yes
Over Temperature Protection
125 Deg C
Under/Over Voltage Protection
< 7Vdc > 30Vdc
Minimum Duty Cycle Monitor
Yes (limit to 30%)
Commutation Method
6-step, sensorless
Power Dissipation
6.25W
Switch Input/ PWM Input
5Vdc to 18Vdc, 500Hz – 5Khz
GND input = 50% duty cycle
B+/float input = 100% duty cycle
Transient Protection
60V < 100mS
Ambient Operating Temp
-40 to +105 Deg C
Max Length From Controller To Fuel Pump
36”
Status LED
Bi-Color LED status indicator
Mounting Location
Under hood/vehicle
Moisture
Unit is potted
WIRING:
WARNING! USE A MINIMUM OF 12 GAUGE WIRE. BE SURE TO CRIMP OR SOLDER ALL CONNECTORS SECURELY AND
CLEAN ANY AREA WHERE GROUND LEADS WILL BE FASTENED. FAILURE TO USE THE MINIMUM WIRE
GAUGE COULD RESULT IN A PUMP MALFUNCTION AND/OR ELECTRICAL FIRE, RESULTING IN PROPERTY
DAMAGE, SERIOUS INJURY, AND/OR DEATH.
NOTE: Holley VR2 fuel pumps have two internal pumps that can be wired independently or in unison. The advantage to
having two pumps is the option of wiring one pump to supply the engine only, but when the additional flow is needed
for nitrous activation, boost, etc., the second pump can be activated.
(1) WIRING THE FUEL PUMP WITH A RELAY: (Wiring both pumps together)
NOTE: You will need Holley Fuel pump relay kit P/N 12-753 30 AMP x 2 if wiring pumps individually, 534-26 40AMP if wiring
pumps in unison, or equivalent 4-wire relay.
1. Disconnect the cables from the battery.
2. Mount the relay on the firewall of the engine compartment or other suitable location using a sheet metal screw.
WARNING! Before punching or drilling a hole in the firewall, make sure you know what is on the other side to avoid
puncturing equipment such as heater cores, air-conditioning system equipment, hoses, or wiring.
3. Connect the #85 terminal of the relay to a good clean ground.
4. Connect the #86 terminal of the relay to a switched 12V source.
5. Connect the red wires from the controllers to the #87 terminal of the relay.
6. Connect the #30 terminal of the relay the positive side of the battery. It is recommended that a 40amp fuse be placed in-line
between the relay and battery.
7. Connect the black wires from the controllers to a good clean ground.
8. Connect the matching controller harnesses to the fuel pump harnesses.
9. Reconnect the battery cables.