Is there a formula that I can use to figure out the compression ratio after I play with bore x stroke values? Also, stupid question, if I bore out, but not stoke, my PG, the CR will be lower, correct? -Craig "Nightmare" '88 16v (PG-T Proj.) "Calypso" '91 Golf GL (Daily Driver) _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com