im gonna build a n/a b18c. with 91 octane, how high of a compression ratio can i run?

 

depends....daily/street driven or for track? modifications you plan to go with? Tuning will be key if you go low or high compression.

 

Depends on alot of factors....what cams are you going to run? OEM or aftermarket pistons?

 

+1 for tuning making or breaking it if you want to go high comp N/A...

use this to calculate your ESTIMATED compression then go from there.... http://www.zealautowerks.com/

i would personally try to at least run 93 octane gasbut when you get over 11:1 you might want to think about tuning and higher octane gas

 

ITR pistons call it a day

 

c-speedracing.com

 

out of curiousity how much do itr cams cost?

 

itr cams average anywhere from 300-400 bucks depending on who and where you get them from. also, if they are used or brand new would be a factor.

 

I'm assuming the question wasn't what will my compression be, its what kind of compression is streetable right?

Well, as said before, its all in the tuning...
I'm runing 12.7:1 compression on the street with 93 octane, daily driven never had a problem.. i've heard of cars running in the mid 13 compression areas.. so like said before, its all in the compression..

But the key to high compression is good cams, with high compression when you make things flow better, you see bigger results

 

Also note.....dynamic compression will depend on the cam choosen and will have atleast some small part to do with whats streetable.