Mallory Ignition ACCEL DFI PRO RAM 77141_77142_77143_77144 - Manual (Page 4)

of the vehicle. ACCEL recommends supporting the fuel line/tubing every three -
(3) feet.
DUAL FUEL TANKS
It is important to note that for vehicles with either two tanks and/or class A RV s,
it is highly recommended that a boost pump be installed in each tank and fed
through a multi port switching valve when operating in hot climates. Boost pumps
used on such vehicles as a Ford 1985 F-250, 5.0L EFI, will work well for this type
of application. Also, the switching valve from a Ford 6.9L Diesel, 1984 or
Chevrolet 1986 C-10, 305 will work well in dual tank applications. Dual tank
equipped must be plumbed to return excess fuel to the tank, which is in use
supplying fuel to the EFI System to avoid tank overflow problems. The remotely
activated dual three way valves described above will work well in these
applications.
RETURN FUEL LINE INSTALLATION
If your car was originally equipped with a carburetor, a 1/4” diameter fuel line was
used to return the bypassed fuel back to the tank. This line is insufficient to return
the bypass fuel of the PRO RAM Injection System. Therefore ACCEL
recommends using a 5/16” diameter return line from the pressure regulator outlet
to the fuel tank. Be sure to route the return line in protected areas with restriction
free bends. For the tank connection, ACCEL recommends a 5/16” compression
fitting to 6AN `hose fitting.
SENDING UNIT MODIFICATION
To install a return line in your tank, remove the sending unit assembly from the
fuel tank. Have a gas tank repair shop install the return line through the lid on the
sending unit.
MOUNTING THE OXYGEN SENSOR
The PRO RAM Kit includes an oxygen sensor and a M18 x 1.5 hex nuts. This nut
should be welded to the passenger side header collector or exhaust pipe as
close to the connecting flange without interfering with the mounting of the
exhaust manifold or header. Prior to mounting the nut, drill an 11/16” diameter
hole in the exhaust pipe, the hole must be drilled perpendicular to the exhaust
pipe.
Now you are ready for pre-startup.
Refer to GEN 7 or THRUSTER Pre
Start & Tuning guide on CD-R disc.