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Old 09-15-2004, 01:26 PM   #1
disque71
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Default Looking for turbo setup for my WRX that can eventually be put on an STI. Need help!

I am looking to make the initial investment now and put the parts on my WRX and run the set up in moderation (250-350whp on stock block and tranny).

Then eventually buy an STI in a few years when I can find a used one for a decent price (also my insurance premiums drop) and start making serious power.

Here is a list of what I plan to buy so far.

UTEC
FPGreen or GT30/35R (can't decide)
Turbo back exhaust
850cc or STI injectors?
Walbro 342 Fuel Pump?
WORX BOV

PS: To what hp/tq are the stock intercooler and intake goof for?
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Old 09-15-2004, 01:29 PM   #2
pestysti
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yyour injectors wont work with the sti.. i have heard 400 is really pushin the stock TMIC
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Old 09-15-2004, 01:32 PM   #3
disque71
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Quote:
Originally Posted by pestysti
yyour injectors wont work with the sti.. i have heard 400 is really pushin the stock TMIC
What injectors should i go with for the WRX? I just eventually sell the WRX ones and buy new STI ones.
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Old 09-15-2004, 01:57 PM   #4
2000vfr800
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Honestly, I think it would be a poor investment. In a few years, there will have been so much more development for parts for the STi so the parts you buy now would probably not be the "best" for making serious power then and you will want to sell [sp] them anyway. Get good parts now for the WRX, and then start over when you get your STi. IMHO.

Last edited by 2000vfr800; 09-15-2004 at 02:00 PM. Reason: [sp] spelling
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Old 09-15-2004, 03:05 PM   #5
disque71
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im only talking like 2 to 3 years time, i seriously doubt that parts for the sti will have porgressed that much?!?
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Old 09-15-2004, 03:13 PM   #6
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if you are planning on buying the STI, you would be an idiot to invest any of that money into your WRX. Use it to pay the loan down.
That said, you can do a few things that will bolt up to the STI, just keep your stock parts.

You will not be able to run the WRX utec in teh STI, so thats a waste
The STI has a big enough fuel pump, so thats a waste
The injectors will not work with the STI, so thats a waste.
The BOV is a complete waste on EITHER car as its a non power mod.

There are several things that will make your WRX MUCH more fun to drive and bolt up though.
Tanabe GF210 springs (04 spec)-- Will make the STI lower, ride BETTER, and handle better
Turboback Exh--Bolts up to both cars, will make your wrx faster, will make the sti MUCH faster
-- Short ram intake, will do NOTHING for your WRX, will make a good 10whp on an STI


If you are dead set on buying your turbo now, you will be re-selling the pump/injectors/ngine management when it comes time for the STI. Also, remember that any turbo that wil be a worthy upgrade on an STI will be VERY laggy on a 2.0

Best bang for the buck for injectors for your WRX would be modifying your stock injectors, its FREE, but you will have to replace them, so maybe find a set of them used. You will also need some serious tuning to get them running right, as no one has off the shelf maps for them at this time.

You need to also really figure out what you want. You say 250-350whp on stock block and tranny, run in moderation.
350whp is NOTHING NEAR moderation, and at that power level, your stock block and tranny will not last very long. There is a WORLD of difference and a couple thousand dollars between 250whp (full exh, tmic/reflash) and 350whp (a vf22 on 114 race gas)
at 350whp, you will be driving a car capable of a 12.0-12.1 and will CRUSH 99% of the cars on the road. Why even bother with the STI at that point? You will have long since shredded your tranny anyway, so you will already be into an STI tranny or dogbox.

Your best bet money wise is to ditch the WRX ASAP. Yes, you are probably upside down in the loan now, but that situation will only get worse for the next 3-4 years. Yes STI prices will drop used, but so will the trade in value of your car. A 2002 with 45k is already only worth 13k.....
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Old 09-15-2004, 04:07 PM   #7
speedblind
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Quote:
Originally Posted by Davenow
Also, remember that any turbo that wil be a worthy upgrade on an STI will be VERY laggy on a 2.0
That's the first thing I thought when I read the thread title. That .5L is too big a difference to make a swappable setup. Just get a turboback and a reflash and be done with it. When you sell the WRX, you can sell the ECU with the flash and put the turboback onto your STi.
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Old 09-15-2004, 04:32 PM   #8
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Post it in the correct forum, unless you already have a matching setup than was on a dyno or ran at a track.
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Old 09-15-2004, 04:37 PM   #9
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I mean pwople DO use the green and 20Gs on the 2.0, but its not a great combo like it is on teh 2.5
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Old 09-15-2004, 05:19 PM   #10
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Davenow, Who in the heck told you that the stock fuel pump is big enough? Its not.. its not even big enough for a tuned stock Turbo setup.. Let alone a larger turbo.

C
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Old 09-15-2004, 11:16 PM   #11
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Quote:
Originally Posted by AZScoobie
Davenow, Who in the heck told you that the stock fuel pump is big enough? Its not.. its not even big enough for a tuned stock Turbo setup.. Let alone a larger turbo.

C
The couple modded STI's local to me are fine on the stock pump, thats who.
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Old 09-16-2004, 12:31 PM   #12
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The pump is small. Its taxed on a good tune with exhaust just so you know. If you where to hook up a pressure gauge and watch the pressure fall at the top end you would realize that. If you understood that the stock pump has an internal bypass at 55 psi you would also understand that you will not get a 1 to 1 ratio of fuel pressure increase past 15-17 psi of boost.

Clark
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Old 09-16-2004, 12:39 PM   #13
neversatisfied
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Want a big turbo that will work on a STi? How about a T67-25G. I will admit its a bit laggy on the 2.0, but when boost hits it feels crazy. This turbo will also work nicely on an STi. Not to mention it will have enough power to strip the gears in your tranny clean and punch a hole in the top of the WRX block. Believe me, I know first hand.
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Old 09-16-2004, 06:05 PM   #14
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Quote:
Originally Posted by AZScoobie
The pump is small. Its taxed on a good tune with exhaust just so you know. If you where to hook up a pressure gauge and watch the pressure fall at the top end you would realize that. If you understood that the stock pump has an internal bypass at 55 psi you would also understand that you will not get a 1 to 1 ratio of fuel pressure increase past 15-17 psi of boost.

Clark
I didnt know that.

I do now


I would think the standard walbro would fit right?
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Old 09-16-2004, 07:08 PM   #15
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Just get an STi =). You can cover a couple of the payments for the cost of mods....and an STi is the biggest upgrade you can get.
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Old 09-16-2004, 07:27 PM   #16
disque71
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Quote:
Originally Posted by sachin
Just get an STi =). You can cover a couple of the payments for the cost of mods....and an STi is the biggest upgrade you can get.
I think I may piece together a small turbo kit (vf30) to produce around 300hp for about $2K. That should atleast tide me over till I'm out of school, insurance, used sti value dropes, etc..
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Old 09-17-2004, 02:56 AM   #17
HighWayDrifter
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buy my tec2, t3/t4, injectors (rc's) and vishnu fuel rails. Slap on a blitz front mount and some SS fuel lines nad a turbo xs FP regulator. And you have 380whp in the wrx Oh ya the divorced waste gate setup and tial bov would come with it all
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Old 09-17-2004, 12:01 PM   #18
2002WRXSTi
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Quote:
Originally Posted by disque71
I think I may piece together a small turbo kit (vf30) to produce around 300hp for about $2K. That should atleast tide me over till I'm out of school, insurance, used sti value dropes, etc..
The VF30 and a good tune will do you fine if you can drive your car? I have a VF30 and I have yet to be out ET'd by a STi at E-town.

Mind you I have a EJ207 but it is a 2 liter and if a STi is not modded or have a very good driver I suck them up
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Old 09-17-2004, 03:15 PM   #19
disque71
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Quote:
Originally Posted by 2002WRXSTi
The VF30 and a good tune will do you fine if you can drive your car? I have a VF30 and I have yet to be out ET'd by a STi at E-town.

Mind you I have a EJ207 but it is a 2 liter and if a STi is not modded or have a very good driver I suck them up
what the difference between the vf34 and vf30? any pros and cons for each? do you guys have a recommendation or preference?
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Old 09-17-2004, 04:43 PM   #20
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VF30 and VF34 are the same except the 34 uses a Compressor with a teflon face. The Comp wheel cuts clearance in this face during first use for perfect sealing. The 34 uses a Ball bearings and the 30 uses a standard oil/bush bearing.

Clark
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Old 09-17-2004, 05:07 PM   #21
2002WRXSTi
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Quote:
Originally Posted by AZScoobie
VF30 and VF34 are the same except the 34 uses a Compressor with a teflon face. The Comp wheel cuts clearance in this face during first use for perfect sealing. The 34 uses a Ball bearings and the 30 uses a standard oil/bush bearing.

Clark
I was not aware of the teflon sealing part Knew about the bearings tho
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