compression ratio

Heyy all, I am looking to boost my compression right up to make a very tuff NA car, something like a sprint car engine. I have done the cam already with a custom grind cam shaft (unsure of specs) heads have been machined and all head work done! Car made 398hp atw Has anyone ever gone over...

Hi I have started down a somewhat dubious path of chasing a few extra ponies from the ol vn block. I have some doubts about the compression ratio as i cannot find anything conclusive as to the cc's of the standard heads (series 1). The heads have been skimmed 010" and likewise the block has...

G'day, Just wondering if I put a slimmer or thinner head gasket on the old girl. Question1. Will it increase the compression ratio? Question2. If so roughly by how much? Question3. Is there a recommended brand and/or supplier. Cheers and thanks for reading.