hi guys, I have a 91 crx si sohc zc, headers, pulley, ground kit CAI cam gear complete exhaust and now a blox intake manifold. Though I don't know what size throttle body I'm suppose to run, I know edelbrock makes 65 mm carb legal ones. But I've read of people running 74 mm ones with no issues. This is a weekend warrior, autox car, so I'd like some decent gas mileage and as much HP as possible. I'm not sure if the throttle body affects mpg, but anyi nfo you guys might have, please comment. I'm leaning for a blox throttle body, either 66 68 or 70 mm. Thanks guys

 

or what size do you run, and what do you think about it?

 

so I found allot of articles on the web, the stock size on the d16a6 is 56 rite? and my exhaust is 2.5 " I was told to get the size of the manifold. True?

 

You don't need a bigger tb on a near stock engine. Your stock one will likely perform best.

 

because too big will decrease the air velocity rite?
I can't re-use the crx one, so I will just buy the smallest one. thanks. any more info is welcome

 

Just buy a stock 92-95 tb, 56mm I believe.

 

if this is an OBD0 SOHC ZC with stock intake manifold, only the throttle bodies from D16A6 or D16A1 will fit - different bolt pattern from the later models

 

I read that I should get the one that matches closest to the size of my CAI and the size of the blox manifold. I'll get the smallest one to those?

 

you should get a t body that matches the port of your intake plenum because it will create less air turbulence. if you are not running an aftermarket intake mani you can have your stock one port matched and screet honed for better flow.

 

dont go too big ....go with like a type r sized tb..... i think its 64mm if im not mistaken