Hey guys i hope you can help..i quess i am more confused now than ever.(very easily done)I have a 454, 30 over that has been zero decked to the flat tops.I am currently running @97 cc closed chamber oval port heads with a .039 compressed head gasket..i am running the isky mega 280 cam..any ideas on compression?I have used Pat Kelly's calculator,however i am coming up with a DCR ratio of 6...I am entering in a wrong value somewhere..thanks Mark

I came up with a SCR of 9.85 and a DCR of 7.72.
I used a 108 lobe sep on your cam with no advance. This also depends on the "actual" cc's of your heads. Hope this helps.

Hey Darren thanks a lot!!! that really helps time for a little fine tuning and i think we are there..thanks again..Mark