01-18-2018, 04:55 PM
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CC Member
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Join Date: Aug 2010
Cobra Make, Engine: Lone Star with IRS, 427W with megasquirt, T56 magnum
Posts: 309
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Not Ranked
I have read lots of stories of heartache with those. The problem is they have a fuel float setup, and instead of returning excess fuel back to the main tank, it stops flow into the surge tank. At low speeds and load, the EFI return pump heats the fuel in the surge tank if to the point the EFI pump starts to cavitate and lose pressure.
I made something very similar on my wifes C3, but rather than stop fuel when it's full, it returns excess back to the main tank. This keeps the fuel in the surge tank from getting hot and causing the EFI pump to cavitate.
The surge tank is a good idea, but I'm not a big fan of the way the fuel commander tries to avoid having a return line.
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