Thread: boiling fuel
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Old 06-23-2008, 02:12 PM
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Mike Bartlett Mike Bartlett is offline
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Join Date: Sep 2003
Location: Pleasanton, CA
Cobra Make, Engine: CSX4771-CF. 1966 427 S/O
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DU I had the same problem in Reno, what decooney was referring to, with my car. Hot as hell 105+ and high altitiude. My car stalled while in slow moving traffic through Viginia City. Acted as if too much fuel getting into the carb. Got back to The Nugget in Reno and lowered my float bowl level a bit. I went through even hotter temperatures the next day driving home. No problem at all. A quick fix that just took a few minutes.

Another thing a buddy of mine and I checked was front bowl temp after that hot drive. We got back to Reno and with almost identical motors my firends Cobra front bowl was considerably cooler (with Turkey Pan) than mine with no Turkey pan. I think that aluminum really helps keep the bowl cooler. I do have the Phenolic spacer and my fuel log is isolated but obviously it didn't help much. I believe the problem is the fuel gets real hot at times, then with thermal expansion, it forces itself through the needle/seat causing the motor to richen up then flood itself?

The only other observation I made was my fuel pressure at the time was about 8-9 psi. I am not sure what the "norm" or max should be?

Mike
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