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Old 01-20-2009   #1
scheides
flips McGee
 
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Re: Whats new with Teh Gheyrod...

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 skunk one was not even really included in your test yet, because it leaked so badly. Hopefully you can get it to not leak. Once you do, I'd expect better results! Any gains to be had from a basic port job like this (similar to what I have on my car) will only really be realized with a bigger TB, and port-matching manifold inlet to that TB. Furthermore, on a stock turbo and pump gas, there aren't a ton of gains to be had, even with a more elaborate port job. Hoping for 10whp through this is reasonable though I think, and if ever a bigger turbo is put on this car, the gains will be further realized.

For reference, here is my 65mm TB matched to the IM:


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.

Last edited by scheides; 01-20-2009 at 08:41 AM..
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Old 01-20-2009   #2
Kracka
R U DTF bro?
 
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Join Date: Aug 2003
Location: Oak Point, TX
Drives: C8 Stingray Z51
Posts: 20,620
Re: Whats new with Teh Gheyrod...

Quote:
Originally Posted by scheides View Post
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.
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)
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I agree with Kracka.
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