06-12-2006, 03:25 PM
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CC Member
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Join Date: Jul 2004
Location: Alpharetta,
GA
Cobra Make, Engine: ERA #414 427 s/o w. Shelby Aluminum heads, Edelbrock Performer RPM Intake, Mighty Demon 750, Tremec TKO 600
Posts: 714
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Not Ranked
I've been looking into changing my fuel supply set up and here's a couple of things that I've found in my "research" relative to your questions:
- There are several regulators out there and many have a 1/4" npt port for a fuel gauge - try Summit and Jegs. Holley, Barry Grant, and others make regulators
- The fuel line size is somewhat dictated by the engine's fuel requirements - 600 HP drag machine is going to need more flow than a 350 HP street job. I'm going to use -8 AN from fuel pump to regulator and -6 AN from regulator to carb
- Most setups show filter placed before regulator with regulator as close to the carb as is practical. Have seen carb inlet fittings with filter screens in them but these appear to be secondary filtering, not the primary filter mechanism
- One tip said that you should step down the line size as it passes each major restriction point in the flow ie - 10 AN" from tank to pump, -8 AN from pump to regulator, and -6 AN from regulator to carb.
- Try to use hard line from tank to pump to avoid suction collapsing a rubber line.
- Using a by-pass with a return line to the fuel tank will help keep more constant fuel pressure and keep fuel cooler as it continues to flow
- Route lines and put fittings and regulators away from engine heat sources to reduce vapor lock and heating of fuel.
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