hello, I have a B16A2 (SirII in us i think) and some modifications above, ECU OBDI P30 with chips home made with rev-limit 8800 rpm, Cam CTR, valve spring CTR, intake manifold AEBS, CAI J&R, head port and polish with 11.0cr and more.... my question is:

I've the choice between two throttle body. either are type R 62mm polished, or a JG 65mm. which of the 2 advise me? and which is advantage and of disadvantage of the 2?

thanks

 

I would honestly go with the 65mm and port match it to the intake manifold

you will have better throttle response and you will have more air available to feed the better flowing cams