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

All turbos need new injectors?

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Old Nov 27, 2006 | 12:29 PM
  #1  
Weakness's Avatar
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From: Village of Lakewood, IL
Car Info: 2005 Subaru WRX STi
All turbos need new injectors?

Pretty simple question... do all turbo kits that will replace the stock VF39 setup require new injectors? I didnt know if there are some more "tame" turbo's out there that could/would use the stock injectors. THANKS!
Old Nov 27, 2006 | 02:01 PM
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Car Info: 04' STi
u should upgrade. i had 850cc injectors installed w/ my 20g.

Last edited by Renegade; Dec 7, 2006 at 09:55 PM.
Old Dec 1, 2006 | 06:05 AM
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without knowing what car ya got and what ya plans are.......there is no possible way to answer these questions
Old Dec 1, 2006 | 06:31 AM
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since you said "replace the stock VF39" I'll assume you have an STI. the VF34 doesn't need new injectors (someone correct me if I'm an R-tard) If you have an STI you might as well get a decent sized turbo like a 20G which will require an injector upgrade.
Old Dec 1, 2006 | 01:13 PM
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From: Evansville, IN
Car Info: 2003 Subaru WRX Aspen White
Originally Posted by Jakes02
If you have an STI you might as well get a decent sized turbo like a 20G which will require an injector upgrade.
+1....any VF series upgrade would be worthless on an STi...18G minimum upgrade, 20G or larger preferred.

The '06 WRX is about the only subaru that does not 'require' larger injectors to run a larger turbo. You could run a conservative 18G setup on it & be 'ok'...I'd still upgrade though.
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