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

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Old Feb 19, 2014 | 05:01 PM
  #1  
Monster450r's Avatar
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Car Info: SUBARU IMPREZA WRX STI 2007
engine build

Hey guys im wondering if this is a good setup or not?
2006 wrx sti on blouch 18gxt billet turbo, upgraded tmic and E85 on stock internals for daily driving and AutoX.
Old Feb 19, 2014 | 05:07 PM
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fuel injectors and fuel pump already upgraded? What are you looking to get out of a setup? Low end or top end power?
Old Feb 19, 2014 | 05:23 PM
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Car Info: SUBARU IMPREZA WRX STI 2007
Originally Posted by esousa22
fuel injectors and fuel pump already upgraded? What are you looking to get out of a setup? Low end or top end power?
Fuel pump and injectors will be upgraded. Im looking to get atleast 400-450 and im trying to get more low end power and mid.
Old Feb 19, 2014 | 05:50 PM
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Car Info: Built, 6-Speed, E85, #pluskey 06 Wagon
Honestly, I dont think you will make that much power (on any dyno) with the upgrades you are wanting. But, these are great upgrades, and the power will be plenty. Don't let numbers fool you, its all about the butt dyno.
Old Feb 20, 2014 | 07:58 AM
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Yeah 18g xtr and top mount on e-85 will be a blast. I agree as well you will have trouble hitting 400 to 450 on that turbo.

Expect a number closer to 350 on a safe tune.

Ftr I am sitting at right around 350hp and it a blast. My setup
Dom3XTR, FMIC, 1000cc injectors and e-85. I am capable of way more but left it where it is for saftey on the stock block.
My butt dyno loves the power numbers I am at though.

IMHO and experience you can ask around all day on the boards and get numerous answers but the best thing to do is figure out who your tuner is going to be and ask them. Whoever you choose will have a parts preference to get you to your specific goals. Also they will be able to tell you what the reality is to make the numbers you want as far as parts.

Last edited by Shayhan27; Feb 20, 2014 at 08:00 AM.
Old Feb 20, 2014 | 08:36 AM
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i would suggest doing a header and if your doing the turbo, do an inlet, also a boost controller.
Go get your car dyno'd now and see what it makes in its current state. that will give you a better idea as to how much you can/will make. With what i am currently making with my current mods (282/290, OTS cobb strage 2) when i install all my upgrades (ebcs,inlet,large TMIC,injectors,EL header, Blouch 18g XT 8cm hot ported wastegate) if i did an e85 tune i would be close or at the numbers you want. I'm shooting for 350WHP on 91.
Old Mar 2, 2014 | 09:41 AM
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Have you been in a car with 400-450? Not sure if you wanna daily that with the amount of lag usually that comes with a build like that.
Old Mar 2, 2014 | 09:46 AM
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Car Info: '02 WRX + '15 WRX
Originally Posted by Monster450r
Fuel pump and injectors will be upgraded. Im looking to get atleast 400-450 and im trying to get more low end power and mid.
18G on E85? You won't even come close to that.

As someone with a non-rotated 400 whp pump setup, I would kill myself if this car was a DD. It's too laggy. A setup like this is all top end power.

Originally Posted by SkizzDawg
i would suggest doing a header and if your doing the turbo, do an inlet, also a boost controller.
Go get your car dyno'd now and see what it makes in its current state. that will give you a better idea as to how much you can/will make. With what i am currently making with my current mods (282/290, OTS cobb strage 2) when i install all my upgrades (ebcs,inlet,large TMIC,injectors,EL header, Blouch 18g XT 8cm hot ported wastegate) if i did an e85 tune i would be close or at the numbers you want. I'm shooting for 350WHP on 91.
You're overshooting with those expectations.

Last edited by Brfatal; Mar 2, 2014 at 09:49 AM.
Old Mar 2, 2014 | 10:38 PM
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Originally Posted by Brfatal
18G on E85? You won't even come close to that.

As someone with a non-rotated 400 whp pump setup, I would kill myself if this car was a DD. It's too laggy. A setup like this is all top end power.
Exactly my point!!!!

Running a VF23 and having full boost come on at around 3500-3800 is pretty damn laggy already lol.

But then again it did put down 273 on a heartbreaker
Old Mar 3, 2014 | 06:53 AM
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Originally Posted by Monster450r
Hey guys im wondering if this is a good setup or not?
2006 wrx sti on blouch 18gxt billet turbo, upgraded tmic and E85 on stock internals for daily driving and AutoX.
Are you looking for 400-450 at the wheels or crank? Wont come close to that at the wheels unless you go bigger with more lag.

I had this setup at one point on 91. Its a fun street setup but left me wanting more at the time (281/302 at the wheels on 91oct on Eq's lower calibrated dyno). Spool was around 3300 but fell out on the top end. For autox it would of been a great setup especially with e85. The E85 will make a big difference and get you the extra power mine was missing.

In comparsion I switched over to a atp gtx3071 turbo with some better fuel (meth) and hit 415/450 on EQ's recalibrated dyno and it spools around 3800.

Either way I would seriously think about upgrading your engine internals or be prepared for it. My 2.0L died on the 18gxt before the 2.5 went into it.
Old Mar 3, 2014 | 07:19 AM
  #11  
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Originally Posted by Brfatal
Crazy, that's quicker than my 20G spooled up on a tune only pushing 18 psi on a high compression hybrid. I was hitting 18 at 4,100 RPM.
Is that on a 2.5 with a tmic? I see 20psi at 3800 and right now my car maxes out at 22psi. My wastegate doesnt want to hold anything more then that so i picked up a high psi one so we can get up to 24psi. I just haven't installed it yet.
Old Mar 3, 2014 | 07:20 AM
  #12  
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Man these time jumps while posting are annoying
Old Mar 3, 2014 | 07:48 AM
  #13  
Brfatal's Avatar
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Originally Posted by ddavis
In comparsion I switched over to a atp gtx3071 turbo with some better fuel (meth) and hit 415/450 on EQ's recalibrated dyno and it spools around 3800.
Crazy, that's quicker than my 20G spooled up on a tune only pushing 18 psi on a high compression hybrid. I was hitting 18 at 4,100 RPM.
Old Nov 15, 2016 | 07:21 AM
  #14  
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From: London
Car Info: 2002 WRX with 2.50 Hybrid
Everyday driving [enjoyment ] and reliability should be the priority .
If i'm not mistaken AUTO X is more reliant on torque and power in
lower RPM range unless you have a long track .I've been chasing HP
and decided 365 HP at the wheels is enough .

Mike
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