08-20-2019, 06:26 PM
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Senior Club Cobra Member
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Join Date: Mar 2000
Location: St. Augustine,
FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,947
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Not Ranked
I went to EFI for practical reasons. The carb would heat up, at slow speeds after a run its fuel bowls would boil over into the bowl vents and then into the intake, killing the engine instantly. It would then take forever to evaporate enough to let me start it again.
I tried the insulating carb gaskets, the heat shields, the regulator with a return line so the gas wouldn't heat up as much since it wasn't sitting for as long under the hood. Nothing worked. The only thing that was suggested that might have worked would've been to run air conditioning vents directly at the bowls 
I attribute the boiling fuel bowl phenomenon to the alcohol in the gas, giving a way lower boiling point to that part of the fuel. I didn't get to try non-alcohol gas as it wasn't widely available back then but it may have helped. If I still had a carb I'd try it now, but not going back to find out!
EFI runs at 43.5psi, so boiling isn't an issue...
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Wells's law of engine size: If it matters what gear you're in, the engine's too small!
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