Cosworth Intake Manifold and TGV delete kit - Subaru WRX Forum
 
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post #1 of 6 Old 01-19-2011, 09:48 AM Thread Starter
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Cosworth Intake Manifold and TGV delete kit

Does anyone have any experience with this kit on an 08' WRX?

I am not a huge fan of the plastic manifold.

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post #2 of 6 Old 01-19-2011, 01:16 PM
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What is it about the plastic manifold you don't like? is it the way it looks?
What other mods have you already done to your car?
Are you building a purpose built race car or a fast street car/weekend lapping/drag car/autocross, rally car?
If you answer a few of those questions you might get some better advice.

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post #3 of 6 Old 01-19-2011, 03:14 PM
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Ok, I had a look at another thread where you posted the mods you were currently installing.
Unless you are running a GT35 turbo or bigger and extending the rev limit beyond 7000rpm, installing the Cosworth IM is going to net you less horspower. The Cosworth IM becomes useful once you are making over 500hp and extending your redline to say 8000rpms. It makes good power up top above 6500rpm when you have a really big turbo and supporting mods. It should be one of the last mods on your list.

Read this: Cosworth Manifold/ GT30R Testing... - NASIOC

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post #4 of 6 Old 01-19-2011, 06:18 PM Thread Starter
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Hey I appreciate the info. After careful reading of several sites and a lot of info today, my parts list has changed dramatically. Thanks to a 56 page thread on this site. Boost Addicts.

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post #5 of 6 Old 01-21-2011, 06:06 PM
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Definitely a good thread to look at since he used a billion different parts on his build. Too bad he disappeared off the face of the earth.

I will affirm operadude, the cossie makes power higher up in the powerband and on big turbo's. Down low you'll suffer, and on a small turbo you'll suffer. Both of those and you're really hurting a stock turbo set up.

The cossie tgv's sound like a good idea. They're a composite like the stock IM so they really reduce the transfer of heat. They basically turn the whole tgv into a phenolic spacer, which is what the whole IM is too.

Looks aside, the newer manifold will perform at least as good if not better than any aluminum/cast manifold just because of the reduced intake temps. I can't comment on the particular flow characteristics to the WRX/STI manifolds that are aluminum, but I also don't see much difference between the two flow wise.

They're also sweet for going with a reverse intake manifold setup as long as you don't mind doing a rotated setup.

-Chris
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post #6 of 6 Old 01-21-2011, 10:05 PM
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Boost is on another forum most of the time now.

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