i am building my ls/vtec high compression/ nitrous motor and i have a couple questions for the honda tech's out there, i am going with a 82mm b18b1 block and im running ls crank and rods, also i have a gsr head i bought off of bigmike here on tr and now im stuck on which pistons to go with? now i heard anything over a 12.5:1 compression ratio isn't a good idea to run on pump gas so i am going for about a 12:1 or so so when i put my info into a compression calculator on c-speedracing and i put some pr3's on it my numbers come out to 12.135:1 with a displacement of 1880.235 cc's but will the pistons hit my head? i heard from a pretty reputable builder here on tr that they will but other tell me it wont? lmk tr i need to get these pistons ordered asap since im taking my motor to the machine shop this weekend lmk thanks tr, john