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Old 07-07-2008, 05:21 PM   #1
Valenti
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Member#: 181227
Join Date: May 2008
Chapter/Region: NWIC
Location: Seattle, Washington
Vehicle:
1999 RSTI BDP (47a)
Full 2004 STI Swap

Default 2.5L USDM STI Block

I am building a solid 2.5 L sti block that I am going to swap into my 02 wrx after I drop in a 6speed.

So far for the block
I have ACL bearings

I need advice on pistons and rods, and if the sti crank is reliable.

I am essentially building a 400 awhp daily driver that is bulletproof.

Thanks for any comments or advice.

- Chris
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Last edited by Valenti; 07-31-2009 at 01:47 PM.
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Old 07-07-2008, 06:01 PM   #2
benw
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Member#: 103320
Join Date: Dec 2005
Location: Oklahoma City
Vehicle:
2005 wingless
aspen white

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Chris, while I haven't the firsthand experience, I can say that the STI crank should be fine for your goal of 400whp, based off what I have heard, and read. I have also heard that the stock rods are pretty good at that power level as well.

Pistons is tough, I had the same question as you, and found that a lot of people had great results with almost every manufacturer. The main thing I believe from research is that most pistons will work, but the machine work and tolerances must be spot-on for anything to work properly.
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Old 07-08-2008, 12:41 AM   #3
Valenti
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Member#: 181227
Join Date: May 2008
Chapter/Region: NWIC
Location: Seattle, Washington
Vehicle:
1999 RSTI BDP (47a)
Full 2004 STI Swap

Default

I keep hearing really good thinigs about cosworth pistons and rods, but they can be pricey... I also like weisco and cp, but just am not sure what the best route is yet...
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Old 07-08-2008, 02:36 AM   #4
86ray86
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Join Date: Feb 2008
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i used cp's and argo rods on my last build for 400hp atw on 16psi, they worked perfectly fine,,
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