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Old 11-17-2012, 12:53 AM   #1
Scooby Newbie
Member#: 216124
Join Date: Jul 2009
Default What mods to get 05 STI to 350whp and 12 sec 1/4 mile

A guy told me that with E and stock VF39 turbo on an 05 STi I could get 350whp on "some" dynos and would run 12 sec 1/4 mile times as long as I knew how to launch. He also said I'd keep up with LS3 'vettes in roll races. He said it can be done for less than $5K. Only problem is he didn't tell me what mods and I don't have contact with him anymore. He's on here somewhere I think.

I searched and some people seem to think it can be done but some don't.

Anyone have a suggested mod list?

Any help would be appreciated. Thanks.
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Old 11-17-2012, 10:33 AM   #2
Scooby Newbie
Member#: 248710
Join Date: Jun 2010
Chapter/Region: NESIC
Location: e-town, Mass
2004 WRX STI
Aspen white


i personally went 12.8 with my 04 with just short ram intake, catted downpipe w/ 3" catback, EBCS, and a tune at 20psi on pump gas only with 18's. so if you went quality used parts say, e85, turbo inlet, injectors, fuel pump, TGV deletes, and an up pipe. you could prob be low 12 range but i dont see you being able to stay with an LS3 from a roll with those mods.
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Old 11-17-2012, 11:04 AM   #3
Scooby Specialist
Member#: 217563
Join Date: Jul 2009
Chapter/Region: South East
Location: Eden NC
2006 Sti 12.68 @ 108
321WHP 422WTQ dynojet SAE


I first went 12s in my 06 Sti with
Invidia divorced dp and ebay catback
drop in K&N air filter
3 port boost controller
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Old 11-17-2012, 11:06 AM   #4
Scooby Newbie
Member#: 66206
Join Date: Jul 2004
2005 WRX STi


If you want to do it on pump 93, here's my build that was 350hp/346tq.



this is a corn fuel 04 sti that almost hits 350 but has big tq (375)

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Old 11-17-2012, 11:35 AM   #5
Scooby Specialist
Member#: 248202
Join Date: May 2010
Chapter/Region: MWSOC
Location: Columbus, Ohio
2013 WRX Sedan


Ask the guy tuning it.
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Old 11-17-2012, 11:48 AM   #6
Equilibrium Tuning
Former Vendor
Member#: 26933
Join Date: Oct 2002
Chapter/Region: BAIC
Location: Fairfield, CA
2006 STI


Basic stage 2 setup plus injectors, fuel pump, boost control and e85 tune will get your low 12's to high 11's.

-- Ed
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Old 11-17-2012, 05:20 PM   #7
Scooby Specialist
Member#: 102238
Join Date: Dec 2005
Chapter/Region: Tri-State
Location: I'm lost in Trenton
08 DGM STi


$5k can get you quite a bit. Turbo for 1.5k-1.7k new, Grimmspeed header with hi flow mid section, up-pipe, EBCS and TGV delete for $850, DP roughly $150-300, Injectors $400-500, fuel pump $85, turbo inlet 200-300, Cobb AP for $700 + tune. All that puts you well under $5k and capable of 380hp pretty easily on pump.
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Old 11-17-2012, 08:49 PM   #8
Scooby Specialist
Member#: 155696
Join Date: Aug 2007
Chapter/Region: Tri-State
Location: New Jersey
2007 BLK STI Dom3XTR
415/405 Precision Tuning


If u want to run e85 just do a tbe,ebc,1200cc Injectors and fuel pump.
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Old 11-17-2012, 11:10 PM   #9
Scooby Specialist
Member#: 179170
Join Date: May 2008
Chapter/Region: South East
Location: Behind the wheel


I went 12.6 with hks flange DP and an autox tune. You can probably dip into 12's with just a tune alone.
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Old 11-18-2012, 04:50 PM   #10
Scooby Specialist
Member#: 178426
Join Date: Apr 2008
Location: FoCo
2010 S4


Since you want to run 12s, don't worry about the hp number. Injectors, fp, dp, ebcs, and a tune should hit 12s depending on driving ability. Run E85 and you should be able to hit low 12s. That should cost you a hell of a lot less than 5k, even buying brand new parts from good brands.
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Old 11-19-2012, 11:27 PM   #11
Scooby Specialist
Member#: 220114
Join Date: Aug 2009
Chapter/Region: NWIC
Location: 509
07 2.5i EJ257 6MT
Rotated BW S200sx-56


I went 12.838 @ 106mph on a 06 wrx with a 04 6MT swap on stage 2 CA 91 oct tuned at 291whp/323wtq. I know a guy who have broke into the 11's on a vf series turbo on E85. Most will be deep into the 12's though.
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