im doing a ls/vtec swap. i have the b18b block and i have teh gsr head and i wnat to put ctr pistons and then do new injectors and head gasket adn then run high octane fuel. Is it safe to do that b/c compression is gonig to be at like 12.7:1?

 

Ok, what now?

GSR head will yield a higher compression than a PR3 ITR or B16 head. That along with CTR pistons will bump compression up pretty high, and being that said, I would run high octane fuel regardless.

So, what's your question?

 

well i want to know if it would be better to run the pr3 pistons b/c i have both i just need to decide which ones to put in

 

ctr baby

 

that would solely depend on how high of compression you want. CTR compression is higher than the pr3's

also, you are going to potentially run into more problems with the higher compression pistons(CTR) if you are not running high enough octane all the time.

When the engine starts a knocking...you're fucked!

 

its possible to tap a vavle too ive heard....

 

you could take care of that with the timing though.

 

pr3's, unless this is strictly a race car, the added power you get from the ctr's wont be worth the headache.

 

wut kind aknockign u talkign about wonder if that wut mine is..pleas explain wut kind of knocking... >< i have an stock ls...but after i took shop got back..makes kinda funny noise not loud knocking but sounds liek timing belt or something is it knocking like loud? mines jus kinda quiet knocking like tic tic tic tic tic kinda fast but gets drowned out and mid to high rpms..can u help me out haha