anybody know the stock bore of an itr tb? i have an itr intake manifold on my b16a and i am using the stock b16 tb and am currently looking into which tb to upgrade to. also does anyone know if the spoon tb is a true 70mm? or does it taper down to a different size? thanks in advance

 

I think the ITR TB is a 62mm size. I'm not sure if that's all the way through or tapered. I believe the Spoon TB is 70MM tapered down to 62mm or 64mm. Sorry for the ambiguity.

 

the spoon is 70mm inlet and 64mm outlet. if you can find one, bbk also makes a 70mm for the b-series.

 

can't you bore out the ITR ones?

 

yes you can

 

Does it pay to have a bigger TB on a stock ITR?

 

http://www.ericksracing.com/throttlebody.htm

 

they sell them (BBK 70MM) at summitt racing. that's where immortal got his (i bought it off him).

 

since we talking about throttle bodies here, when did they get rid of that little bent pipe right by the TPS sensor, and does the type r throttle body have a straight through 62mm bore or is it tapered!

 

I would also like to know the answer to this question and if a bigger TB is a good mod at all?

 

As I've heard It doesn't gain much peak...but it fattens the area under the curve big time.