92BOOSTED

It's a stock bottom end with Trick Flow Track Heat heads,61cc combustion chambers.
I dont know how to calculate this into my compression ratio.Can anyone help?

Thanks

Rye

tinman

Need to know the deck height, head gasket thickess also to get the real mechanical compression ratio.......

92BOOSTED

Thats good,i'll have to get that.give me a bit.
Thanks for trying.


Rye

roundman

this is the formula for calculating the compression ratio from the NHRA rulebook.

compression ratio =
combustion chamber cc's + gasket cc's + deck CI cc's + (displacement x 2.0483*)
combustion chamber cc's + gasket cc's + deck CI cc's

*2.0483 for 8 cyl 2.7311 for 6 cyl 4.0967 for 4 cyl

and where displacement = bore x bore x stroke x 0.7854 x number of cylinders
and deck clearance volume cc's = bore x bore x 12.87 x depth of deck clearance
and gasket volume cc's = bore x bore x 12.87 x compressed thickness of head gasket

92BOOSTED

Thanks roundman,i'll try to work with that as soon as i can get to the engine ane get some dimensions.


Rye