Compression test + cam input results inside...
08-10-2003, 02:34 PM
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I can shift faster than you.
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Re: Compression test + cam input results inside... You should also list the intake centerline as well in helping compare different cranking compressions with different cams/compression ratios.
Jason
Jason
08-10-2003, 04:24 PM
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I can shift faster than you.
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Re: Compression test + cam input results inside... Phillip, no, I sure don't. I never did a compression test on that motor. Sorry...
Jason
Jason
08-11-2003, 06:11 AM
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Re: Compression test + cam input results inside... Comp 218/218, .528 lift, 114 LSA, 114 ICL, stock compression ratio:
225 psi with 6 degrees of advance
215 psi with 2 degrees of advance
225 psi with 6 degrees of advance
215 psi with 2 degrees of advance
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03-14-2004, 09:31 AM
#14
I did a search and found this old thread...figured I'd add to it.
I did a compression check on my 2002 Z28 with a Thunder Racing 227/224 reverse split cam and 10.8:1 compression. I think it's 114lsa with three degress of advance ground in. I had seven cylinders hit 240 and one hit 245. They all hit over 150 on the very first crank. Can anyone explain why these are so high? I've been doing a search and haven't found any with numbers like that.
I used a Mac gauge so it wasn't some crappy Autozone off brand or anything. The heads are 5.7L milled .038 Am I running more compression than I thought?
Chad
I did a compression check on my 2002 Z28 with a Thunder Racing 227/224 reverse split cam and 10.8:1 compression. I think it's 114lsa with three degress of advance ground in. I had seven cylinders hit 240 and one hit 245. They all hit over 150 on the very first crank. Can anyone explain why these are so high? I've been doing a search and haven't found any with numbers like that.
I used a Mac gauge so it wasn't some crappy Autozone off brand or anything. The heads are 5.7L milled .038 Am I running more compression than I thought?
Chad
03-15-2004, 02:51 PM
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You can crank it 5 times or 500 times and compression will be the same so that is not a factor. Just crank it until there is no more increase in pressure on the gauge.
It is best to do it while the engine is at operating tempurature but we all know that tight spaces and hot headers equal burnt hands and forearms.
It is best to do it while the engine is at operating tempurature but we all know that tight spaces and hot headers equal burnt hands and forearms.
03-15-2004, 03:08 PM
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Originally Posted by Justin99TA
I did to of my cylinders last night with the throttle body closed and only got 155 160????
