B series throttle body sizes?

[GSi_PSi]

Hey can anyone tell me the sizes of B16, B18C, B18B and B18CR Throttle bodies?....... also what would be the best T/B setup for a B20?

[Mugen_R]

b16a, b18c2, b18b = 60mm
b18c7 = 62mm

[Chr1s]

It's hard to hit the hammer with best throttle body for a B20, It all depends on how well you can get the air in there in the first place, ie - camshafts and intake manifold

In terms of single throttle design, a well designed/worked manifold with a 68mm throttle and capacity for the motor to breathe that hard is best. Otherwise 64mm could suffice.

[GSi_PSi]

so im bottle necking my engine hard by running 60mm throttle body and B16a intake manifold

[fatboyz39]

Unless your WOT all the time then b16a t/b and manifold works pretty well with b20. Good response and down low torque.

[ALLMTR996]

Simple rule of thumb for a STD type B20Vtec builds with anything smaller than ITR cams and a good flowing header/exhaust package.

big runner manifold large plenum small TB

small runner manifold small plenum big TB

[Chr1s]

I didn't know people built motors NOT to put their foot to the floor Jimmy?

[fatboyz39]

I didn't know people built motors NOT to put their foot to the floor Jimmy?

How far can you go for the streets? speed limit.

[Chr1s]

How far can you go for the streets? speed limit.

lol....that was a very realistic comment, should stick to your B16s then..

[Benson]

lol....that was a very realistic comment, should stick to your B16s then..

Some people like the low end torque to cruise around

[Chr1s]

You have got to be kidding me...

partial throttle on a 68mm throttle is terrible now is it?

[GSi_PSi]

well id rather a car that goes fast throughout the whole rev range. And dont B series motors love to breathe?...
If ive slapped in ITR cams what throttle body size?.....