I was wondering how much of a CR do you need to effectively make the ITB's work? TWM in particular if that helps

The Setup it will be going on:
B18C1 bottom w/ jdm itr pistons
2 layer headgasket
GSR Head w/ JUN 3 cams <-----i dont even know the exact CR of this setup either

 

bump

 

I am not sure on your exact setup but you should around 12:1 (guessing). From other peoples experience, and my own, you are at your limit for running 93 octane. If I ever finish my project I will be running an almost identical setup with TWM throttle bodies with high goals of 220whp.

My point is your compression ratio is high enough for the street. I would say go ahead with the trottle bodies.

 

anymore advice please!

 

hmm im curious about this too im running 11.5:1 is that a little on the low side to get the most out of itb's?

 

you might want to think about preventing detonation when running pump gas, instead of using the intake system to determine what c.r. you should be running.

 

i was planing on running 100 octane anyway, but another thing i was curious about if i do you use whack @$$ 91 octane w/ the setup i plan on running will there be detonation even if i just drive regularly say to and from work w/o plans of ******* the motor anyway...will there be detonation for sure still???