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02-09-2009, 09:39 AM | #1 |
Scooby Guru
Member#: 46135
Join Date: Oct 2003
Chapter/Region:
Tri-State
Location: NY
Vehicle:19 GLA45 AMG C63 AMG |
2.5 WRX internals vs Sti internals
I always wanted to know:
As far as engine internals (pistons, rods, crankshaft, block) are the 2.5 engines very similar or identical? (Sti and WRX) The Sti has the AVCS that I don't think the WRX has, which will probably make the heads different, even as castings, I would suspect. A consequence could be that if you're swapping an Sti engine into a WRX but cannot make provision to operate the AVCS, you have a car with the same engine features and potential that a 2.5 WRX has. Am I wrong?
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02-09-2009, 10:00 AM | #2 |
Scooby Newbie
Member#: 128314
Join Date: Oct 2006
Chapter/Region:
South East
Location: Summerville S.C.
Vehicle:2006 WRX OBP |
They are nearly identical. They have different pistons and they both have AVCS but the heads are slightly different due to the air pump. Other than that I'm pretty sure they are the same.
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02-09-2009, 10:18 AM | #3 |
Scooby Guru
Member#: 51961
Join Date: Jan 2004
Chapter/Region:
RMIC
Location: Broomfield, CO
Vehicle:2005 STi 2012 WRX |
The wrx also has slightly higher compression (8.5 vs 8.2)
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02-09-2009, 10:20 AM | #4 | ||
Scooby Guru
Member#: 140163
Join Date: Feb 2007
Chapter/Region:
MAIC
Location: 3MI Racing
Vehicle:03 STi hellaflunctional |
http://forums.nasioc.com/forums/show....php?t=1667168
http://forums.nasioc.com/forums/show....php?t=1594587 Quote:
Quote:
Last edited by nhat; 02-09-2009 at 10:25 AM. |
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