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Old 01-17-2008, 11:57 AM   #1
WRB_in_my_veins
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Default Port & Polish Question on Stock Header

Question for any (self proclaimed) port/polish gurus. I am planning on dropping my stock header off to at least gasket match it and smooth out the openings.

1. Is it going to do anything for me without p/p the exhaust outlet of the heads?
2. Is it worth the time to do the header if I donít pull the uppipe out and do it too?

If you canít already tell: I REAAAALLLLY donít want to pull the uppipe out. I hated that job the first time. I swapped in a gutted stocker about a year ago, and I don't really want to go through the process of getting it out again.
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Old 01-17-2008, 12:10 PM   #2
sti25impreza
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the up will be a bottle neck if you dont to that also, how much of one i have no idea.

if you want to get the most out of p&p you should do everything...collectors, crossover pipe, up pipe, and turbo.
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Old 01-18-2008, 11:17 AM   #3
REXtard04
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Check out Grimmspeed, they have a PnP offer on everything you need, and also have options to avoid any down time if you don't have another car. All you do is pay the core charge and send them your OEM's back, then you get the money back.

I'm planning to do this in the spring with my exhaust manifold, intake manifold, up-pipe, turbo, x-over pipe......and get them all with the thermal coating and new gaskets. Check out their website.
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Old 01-18-2008, 11:51 AM   #4
WRB_in_my_veins
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I don't really want to go with the Grimmspeed deal. Don't get me wrong, they have quality packages out there but I've got a 33 gal. air compressor, some carbide bits, and a car that's parked in the garage until April or so. Winter beater FTW! I have no intention of p&p the turbo, forget that. I just don't care that much. What I'm looking for is a free power adder/spool time decrease.

I guess some input from people that have p&p the entire stock header would be appreciated. Did you take much off the uppipe at all? Are the collectors and crossover the areas for biggest improvement or are all the parts essentially equal in their need of p&p?
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Old 01-18-2008, 12:25 PM   #5
TurbojonLS
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Did you put your EGT probe back into the uppipe? Without it, it comes out much easier.

Also, since you're pulling the passenger's-side manifold, you at least need to loosen the uppipe-turbo connection a lot. The manifold-uppipe connection is the one that's most prone to leaking, so its the one you tighten first.

I guess what I'm saying is that if you're taking the time to do this anyway, take a little more time and do it right.
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Old 01-18-2008, 12:32 PM   #6
GrimmSpeed
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If you port and polish just the stock exhaust manifold and go to a stock up pipe your up pipe will bottle neck your exhaust like said above. Since you have no downtime and wont be driving your car till april you might as well do it.

Quote:
Originally Posted by TurbojonLS View Post

I guess what I'm saying is that if you're taking the time to do this anyway, take a little more time and do it right.

Josh
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