Mallory Ignition ACCEL Digital Fuel Injection Engine Management System 74030 - Manual (Page 16)

14
ACCEL/DFI
MECHANICAL PUMP REMOVAL
If your engine was carbureted, be sure to either cap off the
fittings on your mechanical pump or remove the pump and
cover the opening with a block off plate.
HIGH PRESSURE FUEL FILTER MOUNTING
Locate the high pressure fuel filter at the outlet of the high
pressure fuel pump on the frame rail. It is recommended to
place a filter between the fuel tank outlet and the pump
inlet if the pickup tube in the tank does not have a filter.
Failure to do so can result in fuel pump damage. ACCEL
DFI high pressure filter, part number 74720 requires 3/8”
Saginaw fittings. If your filter does not have these fittings
you can use part number 74721, these adapter fittings will
fit the 74720 filter and allow you to use a 6AN fitting.
ROUTING HIGH PRESSURE FUEL HOSE
At this point the high pressure circuit of the fuel system can
be plumbed (refer to diagram at the end of this section). If
the existing fuel supply line cannot sustain 150 PSI fuel
pressure (ACCEL recommends a fuel line rated to at least
330 PSI), then it must be replaced with high pressure fuel
line/tubing. Remember, with a carburetor, your fuel system
operated at about 6 PSI. However, with fuel injection, the
system operates around 50 PSI of fuel pressure. Never take
any chances. If in doubt, replace the hose. You will need a
minimum of 3/8” ID supply line and 5/16” ID return.