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Old 04-24-2007, 08:05 AM
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Cobrabill Cobrabill is offline
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Join Date: Nov 2000
Location: Tucson, Az
Cobra Make, Engine: Superformance 427 Side-Oiler
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Mr Mustang-then please explain the following:

The following carbs came from the factory:
MOPAR 340-625cfm
MOPAR 340-1050CFM
MOPAR 440-1350 CFM
426 HEMI-1200 CFM
455SD & 455HO-850cfm
454Chevy-850cfm
455Olds-850cfm
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Joe,a return line is typically a 4AN line(on a carbed motor)that returns fuel to the tank.This does two things:
1-it keeps the pump from "deadheading"
2-it keeps fuel cooler by circulation

I would have placed the P-guage at the end of the run also.In fact,my guage is at the end of the fuel rail on my car(FI motor).

Again,there are two common ways of plumbing this set-up:
1- is to use a regulator to return fuel to the tank.
2-a fitting can be tapped to except a Holley jet of the appropriate size to regulate the returning fuel.
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