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  #1  
Old 23-12-2007, 05:53 PM
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Default 99 sti ecu into wrx

Ok,
Just thought i would ask before i started doing anything, I am looking at increasing my cars power a little bit, not much but just to the same as a sti.
Im looking for reliability, and to be able to take it out on the track on a 40deg day and it to be ok.
So what i was thinking was changing my ecu and turbo to one out of a v5/6 sti.

So what problems am i going to come across? I have heard that the crank and cam angle sensor wiring is reversed, and it has a IAT sensor that i would have to wire in as well.

is there any other major differences between the engines, apart from the ports and sodium filled valves, possibly cams?

Would i see a benefit from changing the intake cams to match or would it run ok with the stock wrx cams?

Any ideas appreciated
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Old 23-12-2007, 08:04 PM
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The Sti engine has different cams and a larger turbo. It would work if you switch the relevant pins, but it may run richer due the tune being for a better flowing head and bigger turbo. Boost would be only slightly higher (Around 16psi).
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Old 23-12-2007, 09:02 PM
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So without the turbo it would run with slightly more boost? if i do the turbo aswell then the stock td04 wont be working as hard as the sti turbo VF24?

Does anyone have a wiring diagram for the v5/6 sti?

Thanks

Tom
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Old 24-12-2007, 12:55 PM
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Quote:
Originally Posted by WhiteRX
So without the turbo it would run with slightly more boost? if i do the turbo aswell then the stock td04 wont be working as hard as the sti turbo VF24?

Thanks

Tom
V5 / V6 ADM Sti had a VF 28.

Dont do it. Pay the money and get a ecutek (I dont think they do verso for my99 / 00 yet).

Too much messing around.

The STI exhuast is very restrictive - very similar to the normal wrx one. Make sure you have a good 3" tbe on there.

Brendon
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Old 24-12-2007, 03:53 PM
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Quote:
Originally Posted by urabus
V5 / V6 ADM Sti had a VF 28.

Dont do it. Pay the money and get a ecutek (I dont think they do verso for my99 / 00 yet).

Too much messing around.

The STI exhuast is very restrictive - very similar to the normal wrx one. Make sure you have a good 3" tbe on there.

Brendon
Sorry meant to write vf28
So you think get a ecutek, that was the other option that i was thinking of doing, but is there anyone in perth who can tune them?

Are their reprogramed ecu's any good? I guess that i should email them but my main reasons for doing this is:

Slightly more power, my car makes 117.5kw ATW now, on a dyno dynamics dyno. If i could get this to around 130-145kw ATW then i will be a very happy man

Higher rev limiter, i would like to have a bit of extra flexability on the track and i think that a extra ~800-1000rpm would help out a bit

More power up higher in the rev range, say peaking 6500rpm

but if possible with the stock STI exhaust (the one i have on now)

I am not really interested in peak power figures, or being super fast down the quater. i am looking for a car that has good power everywhere in the rev range from about 3500rpm up to rev limitier
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Old 24-12-2007, 03:56 PM
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dont mms tune ecutek Tom??
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Old 24-12-2007, 03:56 PM
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i dont know? ill have to check it out.
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Old 26-12-2007, 03:52 PM
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Watch out Tom, the car might not be stock anymore if ya change stuff..hehehe
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Old 26-12-2007, 06:02 PM
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Quote:
Originally Posted by Philbo
Watch out Tom, the car might not be stock anymore if ya change stuff..hehehe
Haha, i dont know what im going to do. Tossing up the idea of selling my car and buying a v6 sti... Then it would be stock,
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Old 26-12-2007, 09:19 PM
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But you only just got the wrx!!!
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