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Gas bubbling?

Posted By bird55 14 Years Ago
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bird55
Posted 14 Years Ago
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Supercharged

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(Todd, I read somewhere that the new Edelbrock 94's are supposed to correct the bleed down problem. Not to sure about that plus the gas boiling after shutting off the engine is another problem. My bird has no room left for a phenolic spacer to insulate the carbs unless I want to cut holes in the hood. I used chrome stainless steel lines from Vintage Speed with absolutely no leakage. I had to modify the lines that Charlie sent me to clear the linkage so I feel comfortable bending up new ones. It wasn't as hard as I expected. I am using the stock tach drive 57 distributor with Petronix and MSD 6 but it needs to be gone through. At this point I have the vacuum advance plugged and bumped up the initial enough that the mechanical advance gets me to the right total advance. Still need to work on that. Thought about coming to some of the events over your way but not ready to push the Bird over Hecker and Pacheco Pass yet. It is a fairly strenuous drive from Santa Cruz.)



OK, my bird's gas line filter always seem to bubble or percolate after I drive a bit. I've always taking it as normal? Is it a problem, carb leaking down or venting issue. The filter is the original style glass AC unit, so it's easy to see. Something I need to fix?









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The Master Cylinder
Posted 14 Years Ago
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suede57ford (6/14/2012)
I havr the fuel boil problemwith my teapoton the black supercharged sedan on hot days as well. It our fuels. Really hard to correct, even with insulators.




That's because they are blending lighter ends (pentanes, NC5's) in the gasoline these days. On warmer days the lighter ends vaporize because they boil at a lower temperature than gasoline. This "bubbling" you witness in your fuel filter is the Pentanes boiling out of the gasoline.

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