Edelbrock 3670 User Manual - page 22
22
3.2.1
Fuel System Installation
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Fuel System
FUEL SYSTEM BASICS
Because your Edelbrock Pro Tuner system controls fuel delivery very differently than a
carburetor, some conversions to your fuel system may be necessary. Victor/Super Victor
Pro-Tuner electronic fuel injection requires high and constant fuel volume and fuel
pressure. For this reason, a good primary fuel line is critical. A 3/8-inch (minimum)
HIGH PRESSURE fuel line must be used as the primary fuel line.
The fuel that bypasses the injectors must be returned to the fuel tank via a return fuel
line. If your vehicle is already equipped with a fuel pump bypass line, this line can be
used as the return fuel line. If not, the original primary line may be used as the return
line or a new return line plumbed with 5/16” ID steel or high pressure line.
Many late-model cars are equipped with an additional fuel line which runs to a charcoal
canister mounted on the driver side of the vehicle. This line MUST be re-installed after
the fuel system conversion and MUST NOT be used as the return fuel line.
FUEL SYSTEM PLUMBING
Edelbrock recommends parallel plumbing for performance applications. Parallel plumbing
is accomplished by teeing the feed hose from the pump into both fuel rails and
connecting the two outlets to the fuel pressure regulator. See Fig. 2 below. This gives
twice the capacity of series configuration plumbing. It also reduces the fuel velocity in
the fuel rail when compared to series plumbing. If the fuel velocity is too high it may
cause flow disturbance in the fuel rails. A parallel configuration is recommended to
achieve the best cylinder to cylinder distribution.