Holley 12-700 Installation Instructions Manual

WARNING! THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING INSTALLATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN POOR PERFORMANCE, VEHICLE DAMAGE, PERSONAL INJURY, OR DEATH.
IF THESE INSTRUCTIONS ARE NOT FULLY UNDERSTOOD, INSTALLATION SHOULD NOT BE ATTEMPTED. PLEASE CONSULT
HOLLEY TECH SERVICE OR A QUALIFIED MECHANIC.
NOTE: NOT FOR USE WITH METHANOL! Will work with E-85!
APPLICATIONS:
Part GPH Flow at Rated
Application Fuel Compatibility
Number PSI and 13.5V
The pumps below do not have an internal bypass. A bypass style regulator and return line are required.
75 @ 8PSI
12-700 Street/Strip Gasoline / Diesel
57 @ 43PSI
47 @ 60 PSI
96 @ 8PSI
12-890 Street/Race Gasoline / Diesel
76 @ 43PSI
70 @ 60 PSI

PARTS REQUIRED FOR INSTALLATION:

 Pre-Filter
 Post-Filter
Relay Kit (30amp minimum) – Holley P/N 12-753 or equivalent

 Safety Shutoff Switch (Holley P/N 12-810 or equivalent)
 Fuel hose & fittings
 Wire & connectors
 Mounting hardware
NOTE: These pumps are not serviceable in the field. Contact Holley tech service for fuel pump service.

INTRODUCTION:

Congratulations on your purchase of the Holley HP Fuel Pump. This instruction sheet contains all the information needed to install this fuel pump.
Please read all the WARNINGS and NOTES. They contain valuable information that can save you time and money. Holley Performance Products
cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions resulting from misapplication of the fuel pumps
and fuel pressure regulators described herein. However, it is our intent to provide the best possible products for our customer; products that perform
properly and satisfy your expectations. Should you need information or parts assistance, please contact Technical Service at 1-270-781-9741, M-F, 8
a.m. to 6 p.m. & Sat. 9 a.m. to 3 p.m. CST. Please have the P/N ready when calling.
NOTE: A screen type pre-filter (100 micron), a top quality post fuel filter, fuel hose and clamps, 12 gauge wire, fuel fittings, assorted terminals, a relay
kit (12-753), and an optional safety shut-off switch (12-810) is required to complete the installation of the Holley HP fuel pump. These parts
are not included with the fuel pump.
NOTE: These Holley HP fuel pumps require the use of a bypass style fuel pressure regulator (Part number 12-845 for carbureted applications and 12-
846 for EFI applications).
NOTE: The Holley HP fuel pump utilizes o-ring sealed inlet/outlet ports. The ports utilize ¾-16 O-ring (-8AN) threads. These ports are not pipe
thread, therefore Do not use thread sealant.
NOTE: Holley ALWAYS RECOMMENDS using our oil pressure safety shut-off switch, part number 12-810.

PUMP MOUNTING AND INSTALLATION:

The best location for mounting any electric fuel pump is the rear of the vehicle, near the fuel tank and in a position even with or below the bottom of the
tank, allowing the fuel to be gravity fed to the pump. The pump should be mounted on a solid member, such as the chassis, with the pump
outlet pointing forward or upward. Avoid exposure of the pump and fuel lines to moving parts and to any hot areas, such as the exhaust manifold.
The pump should not be mounted in an enclosed area, such as the vehicle's trunk. Follow the steps below for mounting the pump.
HP FUEL PUMPS
P/N 12-700 & 12-890
Installation Instructions 199R10569
Pump Fitting
Compatible up Max HP*
to 18.5V
Naturally Forced
Aspirated Induction Inlet Outlet Inlet Outlet Return
900 690
Yes -8AN -8AN -6 AN -6AN
700 530
550 430
1050 800
Yes 900 700 -8AN -8AN -8AN -6AN
800 600
Holley Recommendations for Peak Performance
Minimum Fuel Filter
Size Recommended Line (Carbureted)
Pre
-6AN 162-564 162-555 162-564 162-554 12-845 12-846 13 Amps
-6AN 162-564 162-555 162-564 162-554 12-845 12-846 18 Amps
Fuel Filter Recommended
(Fuel injected) Regulator
Post Pre Post Carb EFI
Max Amp
Draw