trying to figure out compression ratio
Dec 13, 2016 | 05:32 PM
#1
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On The Tree
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From: Odessa Mo.
trying to figure out compression ratio
I'm trying to determine how much to mill 862 5.3L heads on a stock LM7 5.3 and every compression calculator i use gives me different off the wall ratios I would like to be around 10.1 compression to 10.5 here are the specs i been typing in
Bore 3.779 / stroke 3.622 / .054 head gasket / Deck Height .008 / -8cc piston dome
Bore 3.779 / stroke 3.622 / .054 head gasket / Deck Height .008 / -8cc piston dome
Dec 13, 2016 | 06:57 PM
#2
The bore size is supposed to be 3.780
Use .051 for stock head gasket thickness. You usually have to type in 8cc not -8cc as the minus is used for domes. These are not domes they have a dish in them.
If you can get a .040 head gasket and get the heads to 57cc you will be right there.
I think it's about .006 for each cc so you would be around .024 mill to get to 57cc
Use .051 for stock head gasket thickness. You usually have to type in 8cc not -8cc as the minus is used for domes. These are not domes they have a dish in them.
If you can get a .040 head gasket and get the heads to 57cc you will be right there.
I think it's about .006 for each cc so you would be around .024 mill to get to 57cc