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Old 11-15-2005, 05:14 PM   #1
GeorgeRex
Scooby Specialist
Member Sales Rating: (12)
 
Member#: 51695
Join Date: Jan 2004
Location: Northern VA
Vehicle:
2004 STi
Aspen White

Default PDE 1001C Solid Uppipe

I ordered this uppipe from PDE after discussing my requirements with Ian at PDE. I was looking for an uppipe that would match the collector on my Fujitsubo headers and that was solid, ceramic coated and might offer improved gas flow over stock. I paid $224 for it because of a couple of special order features - the ceramic coating and a 1/8 BSPT EGT fitting. The regular price is $159.

This uppipe is made of 2" T-304 Stainless Steel with 0.083" wall thickness. The i.d. at both ends is about 46mm which was a perfect match for my headers and a good match for the ported FP20G turbo which I put on. Mine came out of the box looking like a very nicely built piece. The welds at both flanges are very clean and it comes with quality studs in the turbo flange. Installation was easy because I had the turbo out and fitment was excellent with good mating on both gasket surfaces. A unique feature of the PDE uppipe is that it retains the mount for the heat shield that protects the passenger side CV joint.

It has been said on NASIOC and other forums that the stock STi uppipe is fine and shouldn't be replaced. I don't quite agree. If you are serious about power and flow on a modified STi the stocker has to go. It has an i.d. of 42mm shrinking to at least 40mm or less in the flex section. The flex section has lots of raised edges which will definitely hurt laminar flow at the elevated levels of a modified STi. The flange/pipe unions are not tapered which will also hurt flow. The heat shields are known to break and it weighs 2.2 lbs more than the PDE uppipe. For those on a budget, obviously there are better ways to spend your money to get horsepower but for those who want to cover all their bases, this uppipe is a nice piece to have.



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Old 12-11-2005, 04:02 PM   #2
subeesteve25
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i have it, very nice piece
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Old 12-11-2005, 04:06 PM   #3
supermarkus
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Member#: 6971
Join Date: May 2001
Location: Edmonds, Washington, USA
Vehicle:
2008 WRX STi
SSM

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why put the egt probe there?
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Old 12-19-2005, 05:27 PM   #4
GeorgeRex
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Member#: 51695
Join Date: Jan 2004
Location: Northern VA
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2004 STi
Aspen White

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Quote:
Originally Posted by supermarkus
why put the egt probe there?
Because I am overseas and I was not sure that I could find someone to weld a bung onto my Fujitsubo headers without butchering them. I needed a plug and play solution.
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