Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

(what size turbo in the) new TR?

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Old Jan 12, 2006 | 06:16 PM
  #1  
Djcal's Avatar
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Joined: May 2005
Posts: 9
From: Colorado
Car Info: 2002 SUbaru Wrx (Black)
New TR?

What up in scoobie land???? I have a quick question.... What size turbo comes in the TR???? One of my boys and myself (without driving it of course) assume that since it has more displacement it has a smaller turbo then last year! ANy takers?? All answers are appreciated!!!

Djcal
Old Jan 12, 2006 | 06:49 PM
  #2  
Wingless Wonder's Avatar
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Joined: Dec 2002
Posts: 10,029
From: Sacramento CA
Car Info: 02 Impreza WRX sedan
Cobb Tuning posted their initial test results which indicate a larger turbo than previous 2.0 liter WRXs and slightly larger than the Forester XT turbo.

The larger displacement of the 2006 WRX and TR version relative to the 2.0 liter engine can tolerate both a larger turbo sizing and a more aggressive camshaft(s) profile as the additional displacement makes up for the loss in low end torque introduced by those components, but with more top end power. Increasing displacement has almost no drawbacks other than a slight weight increase from a longer crankshaft stroke or larger diameter pistons. To put it into simplistic drag racing V-8 terms, a street/strip camshaft with a lumpy idle in an old 283 Chevy small block would probably be a very mild, very streetable choice in a 350 small block.

--
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"…axles of evil…" - george w. bush
Old Jan 12, 2006 | 07:44 PM
  #3  
Friedenreich686's Avatar
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Joined: Jul 2005
Posts: 63
From: Scottsdale, AZ
Car Info: 2005 WRX wagon
I can't belive you just compared a sick subaru to an american car (garbage)! Nice explanation though it got the point across, but I just have to say american muscle cars get to big thumbs down in my book.
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