currrently building a lsvtec set up i have a b18a block with gsr head i was wondering what compression ratio i would be looking at with pr3 pistons, type r pistons, and gsr pistons... and if there is any valve to piston clearance with any of these if someone could tell me which one would give me clearance problems if any and which one should be best for the application...keep in mind i will be using nitrous no more than a 100 shot.... most likely a 50 or 75 shot until tuned.... thinks alot... i am wanting to run around 11.5:1 would like to go more but i dont think it would be safe with the nitrous.... thanks to everyone who helps

 

heres a link to c-speedracing's compression calculator

http://www.c-speedracing.com/h...c.php