Quote:
Originally Posted by scheides
Keep in mind the 2whp/nil gains were from just the ported manifold on the STOCK TB (that's what you told me on the phone, right?).
The stock TB is 60 or 62mm and the skunk2 one is 68mm, so the area of flow is significantly increased by doing this, so improved throttle response and a slew of other little differences make this mod worth the money.
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Yes, this was on the stock TB so it was a true representation of adding just a basic ported intake manifold leading be to agree with what Mil.Spec told me of not wasting the money for a basic port-job and just matching the intake manifold inlet to the ported throttle body. Hopefully we can see gains by going deeper into the IM runners/plenum though.
A few random stock specs:
Evo VIII IM inlet = 59mm
Evo IX IM inlet = 61mm
Evo VIII TB = 65mm (inlet) tapering down to 59mm (outlet)
Evo IX TB = 65mm (inlet) tapering down to 61mm (outlet)