im soon to be buying a slightly moded itr with a jdm b18c5 in it.i want to make 240 with it without having to tear open the bottom end.it already has a cf password jdm intake but ive heard itb's would make the most out of it.should i go with the itb's or keep my intake?would i have to custom tune with the itb's or can i get an ecu from mugen online?i heard the jdm r header is one of the best so i dont plan to change it.im not sure on vavle terrain and cams either so im up for suggestions.the head has been shaved and has had more pp work and has an msd ignition.

 

I have 84mm sleeves in mine, full Skunk2 stage 2 valvetrain, also have the pass:jdm intake, 12.5:1 compression, and a crap tune. Im running 220whp with that setup. Thats also with stock 240cc injectors, I have 370cc injectors just waiting to be put in. So I figure with those and a good tune I should be easily at 250. Stock intake manifold too.

 

Forced induction is the only way you're going to do that.

 

Wow. 220whp on 240's is dangerously lean. When I "tried" that I had A/F's in the 16's.