Engine Fuel Pipe System - Page 2 - Alfa Romeo Forum
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Yes I have run the twin carbs without return line with no problems. Most of the single carb cars didn't have return lines. No pressure reg or anything - I guess the pump can only produce a limited amount of pressure so not an issue. The return line on the higher performance twin carb engines might have been more about keeping the fuel cool rather than having it sitting in hot fuel lines in a hot engine bay.
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Thanks everyone for your contributions.

I've been reassured that the system I have is fine. The only other option would be to send the return pipe to the fuel tank but I can't do that as my tank doesn't have an inlet for it.

Interesting topic. Thanks again.
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engine , fuel , pipe , system

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