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Old Dec 25, 2004 | 02:04 PM
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I got a 2004 gto i want to the afr 225 cc heads with a 66cc combustion chamber and a lpe cam 631/631 lift i dont care how rough the idle is and prochargers ho kit do you think this would work becuast i know the 66 cc combustion chamber would put my compression near stock so the supercharger should work with pump gas
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Old Dec 25, 2004 | 02:27 PM
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I think a 631/631 lift cam would not idle too bad assuming it's on a 113-115.

Running that much lift requires you work with a parts provider who knows how to spec out a good combo. I'm running a 598/632 lift cam and I'm running into valvetrain issues at 6500 that I hope to mitigate by changing the spring pressure and the rockers.
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Old Dec 25, 2004 | 02:28 PM
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Way too much list on intake for cam. The closer to stock compression you get the less PSI you have to use, in order to run on pump gas.
For the cam, the cam needs more duration on exhaust than intake, because air is being forced in, that also means you need more lift on exhaust to get exhaust gases out of chamber, LS needs to be 115-117.

If you have more questions feel free to ask
lunapark@perigee.net
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Old Dec 25, 2004 | 03:18 PM
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tahoe, what duration is that proposed cam? Duration makes power, but that sounds like a lot of duration. I run 236/246 duration with a 348ci.
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Old Dec 25, 2004 | 05:01 PM
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Originally Posted by Solobarictahoe
I got a 2004 gto i want to the afr 225 cc heads with a 66cc combustion chamber and a lpe cam 631/631 lift i dont care how rough the idle is and prochargers ho kit do you think this would work becuast i know the 66 cc combustion chamber would put my compression near stock so the supercharger should work with pump gas

Pro Stock Johns Duration is right on the money IMO for your setup.
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Old Dec 26, 2004 | 03:56 AM
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that 631 lift cam is a lpe cam 229/242. what does LS mean thanks. also i wanna keep my bottom end stock so if i went to 9:1 compresson could i run 10 psi of boost with prochargers d1sc
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Old Dec 26, 2004 | 03:59 AM
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Originally Posted by Pro Stock John
tahoe, what duration is that proposed cam? Duration makes power, but that sounds like a lot of duration. I run 236/246 duration with a 348ci.
pro stock who makes you cam and what are the specs
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