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Go Back   IWSTI.com: Subaru WRX STI Forums > IWSTI Engine & Drivetrain > 2.5 Liter/Litre Factory Motor


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Old 03-06-2008, 02:51 PM   #1
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Default More power ???

Whats up subies i am runnin cobb stage 2 i got HKS CBE Invidia DP short ram intake LC boost soleniod BOV and pro tuned makin 311whp 340wtrq @19psi !!! what do u think should be the next mods should be and what times in the 1/4 with good launch should i be running. Really need help with the future mods i should be running for more but safe performance. thanx 4 da helpFTW
o yeah forgot i dont really wanna upgrade turbo or go meth .... this cant be the end of stage II is it ? i hope not. Not really ready to spend another 4 to 5 grand for the next upgrade just yet need a lil time anyhelp please


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Last edited by gofastersti; 03-06-2008 at 03:15 PM. Reason: forgot sumthin
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Old 03-06-2008, 03:13 PM   #2
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Default Re: More power ???

Getting rid of BOV?
You should really get the Fuel Pump, your Injectors are pretty much also maxed out, so I would get:

1. Injectors
2. Fuel Pump
3. Water/Meth Injection Kit
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Old 03-06-2008, 03:17 PM   #3
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Default Re: More power ???

would i need to get it retuned after the fuel pump and injectors ...?
Fuel pump walbro 255 i guess
and what size injectors?
And y get rid of the BOV
and is anyone intrested in a utec delta -002??

Last edited by gofastersti; 03-06-2008 at 03:20 PM.
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Old 03-06-2008, 03:18 PM   #4
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Default Re: More power ???

You should be good for high 12's
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Old 03-06-2008, 03:21 PM   #5
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Default Re: More power ???

Quote:
Originally Posted by gofastersti View Post
And y get rid of the BOV
http://www.iwsti.com/forums/engine-p...ff-valves.html

maybe headers/up pipe
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Old 03-06-2008, 03:26 PM   #6
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Default Re: More power ???

I would do header, uppipe, phenolic spacer, maybe PnP the turbo and intake manifold...there are still some things you can do
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Old 03-06-2008, 03:38 PM   #7
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Default Re: More power ???

First of all and up pipe for sti's is pointless it does nothing up pipe is ment more for wrx's thats what i have been told many times from diff ppl so....idk
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Old 03-06-2008, 03:41 PM   #8
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Default Re: More power ???

Not neccesarily, if you are pairing it with a header of larger diameter a larger up would help. Or if you wanted to go external gate.
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Old 03-06-2008, 03:43 PM   #9
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Default Re: More power ???

Quote:
Originally Posted by gofastersti View Post
First of all and up pipe for sti's is pointless it does nothing up pipe is ment more for wrx's thats what i have been told many times from diff ppl so....idk
You have some reading for tonight!
http://www.iwsti.com/forums/engine-p...ious-look.html
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Old 03-06-2008, 03:46 PM   #10
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Default Re: More power ???

Four season thanx 4 the knowledge !!! So i have like $1200 or less to play wit what direction should be done.?
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Old 03-06-2008, 03:52 PM   #11
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Default Re: More power ???

IMO headers are a good idea. Mine are in my kitchen for storage until I can get them on the car. Maddad sells headers with an up pipe included. Cost me about $512 shipped. Maybe toss in some injectors with a new tune.

I also agree on ditching the BOV.
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Old 03-06-2008, 03:53 PM   #12
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Default Re: More power ???

Yeah most people say just b/c the uppipe is catless to leave it alone but there are good gains to be had with an aftermarket piece. If I were you with $1200, I would go with the Maddad header/uppipe combo and wrap it (that should be about $500), buy some GrimmSpeed phenolic spacers (about $80), get the turbo ported with a heat coating (about $500) and then get tuned (about $200). All the prices are just estimates but that would sound like a good start to me.
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Old 03-06-2008, 04:10 PM   #13
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Default Re: More power ???

If your going to do the phenolic spacer, make sure you put a couple washers in between the intercooler and intercooler bracket.

This way the throttle body and the intercooler match up correctly.

Ya I'm Stg II as well. My future mods are: Grimmspeed uppipe dump tube, with the Tial 38mm EWG, DW 750cc injectors, one step colder plugs, phenolic spacer, and a tune of coure...

I'm like you, don't want to do any turbo upgrade for awhile, hope that helps...
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Old 03-06-2008, 09:14 PM   #14
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Default Re: More power ???

Honestly, all these mods arent really gonna give you more then you have at your numbers right now.. Meth would be my suggestion.. Meth and a Tune, I would run a Meth Tune and a Non Meth Tune.. I know you said no Meth and No Turbo.. But adding some header and a EWG and some Injectors are gonna maybe yield you another 15-20WHP if that.. I mean that just my.02.. Dont get me wrong these are al lmods that are gonna help and yeild you some power but they are $$$$ for what you are actually gonna get.. With your $1200 I would do a Auqamist HFS-5 and a Tune and that thing will be a BEAST... And like I said you can run a Meth tune for the weekends and track days, and run your Reg map for DD, and running the Meth will drop your IDC a bit too.. Its a WIN WIN WITH METH...
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Old 03-07-2008, 05:11 AM   #15
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Default Re: More power ???

Sell the BOV. Invest the cash into something more useful.

My suggestions:
1) meth injection
2) injectors and pump (just a pump if adding meth injection)
3) better clutch
4) protune!


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