I am rebuilding a b18c1 bottom end with itr pistons(usdm) and mating it with a 97 itr head and itr IM. I was planning on using my gsr throttle body. I may be able to get ahold of a itr throttle body. Is this worth while to get or not. The reason why I ask this is because the itr real time tegs had a restrictor plate(I think 58mm). I don't know much about this...I have done a search but most of it surrounds 70mm...way to big for my application

 

I would try to get ahold of a ITR throtle body.

 

you should probaly go ahead and try to get ahold of the itr TB.

 

in the N/A fourm they did a huge test on the differances between 60/62/64/68mm TB's and the best gain was 2.3whp @ 8500rpms, the rest of the graph was almost the exact same...I would say if you can get one cheap go for it...

 

with your mods, you wont see a difference, i would say spend the money on something else.