Resolved Throttle body Bolt pattern.

[luvmygst]

Does anyone know the bolt pattern for the stock TB? I have searched to no avail. I am changing intakes but the one I am going to has a Accufab on it, no IAC. I want to make an adapter to put my s90 on the intake. I want to cut one today and I wont be back at the car until later.

Thanks guys!

 

[Canadian_CD9A]

An older post from EvoM says 2.508" x 2.516" for the Evo TB (which bolts to DSM manifolds).

 

[luvmygst]

An older post from EvoM says 2.508" x 2.516" for the Evo TB (which bolts to DSM manifolds).

Awesome man thanks!!

 

[ChestonEngineering]

An older post from EvoM says 2.508" x 2.516" for the Evo TB (which bolts to DSM manifolds).

This was super helpful for making a custom "sandwich plate"

+1 for correct information, thank you!

 

[19Eclipse90]

Can confirm as well. The difference of 0.008” there isn’t going to make much difference from being “square”.

For what it’s worth, I’ve measured and have based my models off a 2.520” square pattern (64mm x 64mm). Since it’s a Japanese engine, dimensions are generally metric. And for something so basic, there’s no reason to do a 63.9mm x 63.7mm bolt pattern.

In any case, oversize the holes just enough and you’ll have plenty of wiggle room without comprising sealing surface or clamp force.