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Old 06-11-2008, 07:32 AM   #1 (permalink)
Registered: Mar 2008
Posts: 60
Reputation: mainline is an unknown
Bolt on question?

I am looking for more bolt ons. The only ones I think I dont have are a O2 housing and a header. I know I can get a ported and polished manifold at cars. Is that better than a header?
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Old 06-11-2008, 07:49 AM   #2 (permalink)
EVOtuners Member
Club Region: Rocky Mountain
Registered: Jul 2007
Posts: 780
Reputation: Joshsevo is an unknown
well it's ported so there's more airflow passing through it which = more HP. now in my opinion since your car will be down I would also port the intake manifold. Buschur does it for like 75. And I heard the throttle body can be ported. Do it all.

Porting the head is expensive but when you get cams and headstuds I would do that also. The more air flow/gas. the more HP you will get.

but like i said all in my opinion
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Old 06-11-2008, 08:41 AM   #3 (permalink)
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Timeslip: 11.510 @ 115.12
Dynosheet: 367whp/386 lb-ft
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Yes, porting and coating the stock manifold is better than going with a tubular header on the stock turbo.

The car shouldn't be down for the porting - just purchase a used manifold locally or on EvoM and have that ported/coated so that there is no downtime. It's not typical to port the intake manifold on a stock turbo'd/mildly-modded Evo, but that's up to you.

Whoa, no, don't port the head when you do cams - that's a crazy expense and mod for the stock turbo. The stock head already outflows the stock turbo by far, so porting it would make the stock turbo even more inefficient. Save that for way down the road on a big turbo, imo.

Stick with basic mods up to 400whp or whatever, then worry about the more advanced mods that typically give less hp/$$.

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Old 06-11-2008, 10:39 AM   #4 (permalink)
Registered: Mar 2008
Posts: 60
Reputation: mainline is an unknown
Thanks guys. Will try to come up with more money. I am going to do a bunch of stuff in the next two months. Its time to do the timing belt so I am goin to try and do cams and studs, and gears. I will see after that. I want a new manifold so that is going to be a must.
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Old 06-11-2008, 11:45 AM   #5 (permalink)
Registered: Dec 2007
Posts: 328
Reputation: Wicked E is an unknown
I have a spare stock exhaust manifold you can have for cheap as a core so no downtime.

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