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  #21 (permalink)  
Old 03-19-2005, 07:44 PM
HSSS427's Avatar
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Join Date: Jul 2004
Location: Alpharetta, GA
Cobra Make, Engine: ERA #414 427 s/o w. Shelby Aluminum heads, Edelbrock Performer RPM Intake, Mighty Demon 750, Tremec TKO 600
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Smile Timing advance seemed to fix this....

I've ordered a Demon from Don Gould at 4 Seconds Flat. Told him about the fuel issue. He said his bet was that I needed to advance my timing to get more fuel burning inside the cylinder instead of heating up the headers and engine with un-burned fuel due to lack of advance. Changed from 18 initial to 22. Car seems to be running 20 degrees cooler and after running it pretty hard today I didn't have any of the boiling issue. I will probably actually increase the initial another 2 degrees to 24 when I get the smaller mechanical advance bushings required to keep total around 36-38. I have an 18 degree bushing installed now and that's the smallest that came with the MSD kit. Don machines a smaller set which he sells that has I think 10, 12, and 14 degree bushings. My engine (427 so, iron block, aluminum heads and intake) really seems to like a lot of advance. Maybe it's because I have 82cc chambers on these Shelby heads vs I think 72cc on the original heads? Anyway, it seems to be running good for now!
Thanks!
Scott
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  #22 (permalink)  
Old 03-20-2005, 05:40 AM
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HSSS427 Scott First you need to rap the fuel line with the insulator foam tape and the fuel log to keep the heat from getting to gas to hot. Your fuel pump is a pulsing one so the pressure to the regulator is bouncing and the valve inside is going to open and close to the pulse. Drop your float bowl levels 1/4 turn and try the car. Your car like mine, there is alot of heat under there. Open the hood an inch, get aspacer that will not srcatch the paint and go for a drive, see what happens. You will bring down the temp under the hood by 20-30 degrees. You may want to rap your header pipes in heat shields. ERA makes some head shields for this. Even with the radiator at a angle down there is alot of air passing through it and having no where to go. Guess this is why the turds hood and nose was cut up and the grandsport has that louvered hood. You are all ready going in the right direction. Get an heat gun and see where you can isolate the heat from the carb and fuel system. Rick Lake
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