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Old 06-11-2007, 05:24 PM
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Too many fuel lines?

Hey fellas. I am installing an edelbrock fuel pump on my corvette's 350 sbc. The stock pump had the main fuel line from the fuel tank, a return line back to the fuel tank, and then the line to the carb.

My new pump has an inlet and an outlet. Can I remove the small return line to the fuel tank?? If not what do I do? Thanks

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Old 06-11-2007, 06:01 PM
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Is your 'vette fuel injected (what year is it)?

What psi is the Edelbrock pump rated for?

You will need a return line. If not then you're pump will get hot, vaporize the gas and cavitate until it burns up. It's just a matter of where you're fuel return will be come from...

EDIT>>> If this is a machanical fuel pump then you can get by without a return line but I don't recommend it. I'm not familiar with Edelbrocks fuel pump line, I thought they only had electric, but I'm not sure...
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Old 06-11-2007, 06:34 PM
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mechanical fuel pump.

Edelbrock made it with an inlet and an outlet. My stock mechanical pump has inlet/outlets for the three lines.

1973 corvette 350 c.i.d.
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Old 06-11-2007, 06:47 PM
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You can safely block the return line and also put on a vented gas cap.
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Old 06-11-2007, 06:49 PM
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Did a little research. Edelbrock intended this to be a non-return fuel pump, so if you're going to use it you can remove your return line and plug the hole from the tank. BUT it will affect your cars drivability. Without a return line, either from the carb or from the pump, don't be suprised if you vaporlock sitting at a long stop light on a hot day. Be careful as the fuel pump may overpower your carb as well causing stumble on take off and an overall rich condition.

If you race this car you should be happy with it, but if you drive this vette (the early 70s style is my favorite ) on the street I'd recommend looking for a return style carb mount pressure regulator. Hope this helps!

Matt
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Old 06-12-2007, 08:29 AM
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Agreed. Get one with the return line. You'll be much happier. The double outlet pumps were usually used in higher performance applications, AC cars, and HD setups. That's not to say that a standard pump won't be enough, but you're basically converting a fuel system for no reason. Why convert? Just get the right pump.
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