Hello,

Does anybody know the exact dimensions of the 20V ITB's? I thought the BT butterflies were 45 mm? What's the distance betweens the holes of the flanges, etc etc?

Thanks

onnaj wrote:Hello,

Does anybody know the exact dimensions of the 20V ITB's? I thought the BT butterflies were 45 mm? What's the distance betweens the holes of the flanges, etc etc?

Thanks

which flange?

On the trumpet side:

Throttle opening is 50mm
Throttle openings are on a 87.5mm spacing
Hardware is M8
Hardware is on an 83mm spacing

Source:
https://drive.google.com/file/d/0B0RQCb ... sp=sharing

If you want to be exact then the opening is about 49.5mm, everyone just uses 50mm I.D stacks though.

What do you have in mind?

Thanks for all the info. It's not for me but someone else Mine is sitting on the blacktop and won't move

Do you know what is the length of the intake manifold + ITB's (i mean the length of the whole assembly without the stacks)?

Stobe wrote:Do you know what is the length of the intake manifold + ITB's (i mean the length of the whole assembly without the stacks)?

This is what I had written down. Not sure if it was my measurements or copied from someone else:
Center intake valve to intake face: 115mm
Peripheral valve to intake face: 120mm
intake face to throttle face (gasket, manifold, throttle): 183.5mm

Thank you!

Oh, another question (sorry for hijacking the topic/off-topic). Has anyone measured the width of 20V cylinder head (and 16V head)? Which on is wider. I am just asking that because i have KP61 and i have only a block this far, and i am tring to measure how "deep" airbox i can use, before it hits the strut tower.

I will start a new thread, so it is easier to find for someone looking the same info.

Do you happen to have the dimensions/sizes at the engine side?