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Old 08-24-2007, 04:24 PM   #1
V8killah91
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Default '04 STi 20g 328whp 347wt

I got tuned at TurboXS in Maryland and hit 328whp and 347wt on a Dynapack. That was with a slipping clutch, on 93 octane, at 22psi peak (was going for 24psi, but he backed it down after the clutch started slipping). Also, the boost tapers more than usual because he didn't want to get very aggressive, with the clutch issue. Other than the clutch problem (which I was unaware of until we started tuning), I had a great experience there.

Here is the mod list:

-FP 20g TD06 8cm (with StaticX wrap)
-Large TMIC
-Deatschwerks 740cc injectors
-Walbro 255lph pump
-1-step colder plugs
-Injen CAI
-Utec
-TurboXS turboback exhaust

What do you guys think of these numbers and how much do you think is left to gain with the new clutch and a more aggressive tune? It's a 3 hour drive for me and with the cost of the re-tune, I'd like to weigh my options to see if the re-tune is worth it.

Graphs Added:



Thanks.
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Last edited by V8killah91; 08-25-2007 at 04:03 PM.
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Old 08-24-2007, 04:51 PM   #2
Tgui
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Well, the hard work is really done. Injectors are working nicely, maf table maybe scaled for your CAI etc. Up the boost yourself a little if you have a WB02 and an EGT once you install a new clutch.
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Old 08-24-2007, 04:55 PM   #3
C J
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Is 330whp a pretty common # for 20g STi's? The number seems kind of low.
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Old 08-24-2007, 05:24 PM   #4
brickhoss
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Quote:
Originally Posted by C J View Post
Is 330whp a pretty common # for 20g STi's? The number seems kind of low.
Once they get everything straightened out, I'm sure It'll read a little higher then that. I don't think that sounds all that bad though to be honest. Depends on the dyno and correction factors used (see other thread in PPB right now).
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Old 08-24-2007, 05:32 PM   #5
Zumble
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His clutch was slipping.
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Old 08-24-2007, 06:19 PM   #6
V8killah91
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Any estimates in whp/wt gains after the retune?

Thanks.
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Old 08-24-2007, 08:48 PM   #7
V8killah91
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Bump for an answer, please.
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Old 08-24-2007, 09:12 PM   #8
Vahnatai
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Mid 340s
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Old 08-24-2007, 09:44 PM   #9
JMK508
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Depending on what dyno is being used it can vary between 330-360 on straight pump 93
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Old 08-24-2007, 10:21 PM   #10
V8killah91
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Is that whp or wtq? Also, it was on a Dynapack.

Quote:
Originally Posted by JMK508 View Post
Depending on what dyno is being used it can vary between 330-360 on straight pump 93

Last edited by V8killah91; 08-25-2007 at 02:19 AM.
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Old 08-25-2007, 12:09 PM   #11
V8killah91
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Bump for more whp/wtq estimates.
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Old 08-25-2007, 12:58 PM   #12
akira02rex
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I say 350-380whp and 400wtq. That is, if you run ATLEAST 20psi+.
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Old 08-25-2007, 12:58 PM   #13
UltimateLurker
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Wow, thanks for this thread, my set-up will be nearly identical...

-Deadbolt 20g TD06 8cm
-Spearco TMIC
-Deatschwerks 740cc injectors
-Walbro 255lph pump
-1-step colder plugs
-AccessPort
-APS Intake
-APS 3" cattless TBE

I'm hoping for 350 at the wheels on 93 pump, but will be satisfied with 330.
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Old 08-25-2007, 01:29 PM   #14
AZScoobie
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Everyones excuse is "a slipping clutch". Rarely is that the problem. Hell I have tuned cars near 600whp with the stock clutch. THey hold 500 with ease.

If your clutch is really worn out and its slipping you will gain power to the hub dyno. How much is anyones guess.

A 20G on an STI engine makes 330 to 370whp pump 93. You need to get up to 22 psi to make 350. I have never had one cross 400 that I can remember off hand. The compressor is just to small. If the car runs good at 330 then enjoy it. Its that last 20 whp you want that starts to push things.

Clark
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Old 08-25-2007, 02:19 PM   #15
V8killah91
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My clutch did actually "give" on the dyno and the engined revved up very quickly. Also, if I "floor it" in 5th or 6th, the clutch will "give" and the RPMs rise quickly without any increase in acceleration. There is no question that my clutch is on the way out.

He's cutting me a break on the retune, so I think the extra 20whp would be worth it. 350whp sounds about right and I don't believe that this is "pushing the engine" in any regard. Also, I'm losing power towards redline, moreso than usual, so the wastegate needs tightened, as well (he kept the tune somewhat conservative until I come back). Overall, I may get 20whp extra, but less of a drop to redline would be attractive also.

Thanks for the mention about the stock clutch, btw. I'm debating which one to get and have been questioning the potential of the OEM one. With the stock clutch holding 500+whp, it should hold approx. 350whp daily driven, no problem.

Quote:
Originally Posted by AZScoobie View Post
Everyones excuse is "a slipping clutch". Rarely is that the problem. Hell I have tuned cars near 600whp with the stock clutch. THey hold 500 with ease.

If your clutch is really worn out and its slipping you will gain power to the hub dyno. How much is anyones guess.

A 20G on an STI engine makes 330 to 370whp pump 93. You need to get up to 22 psi to make 350. I have never had one cross 400 that I can remember off hand. The compressor is just to small. If the car runs good at 330 then enjoy it. Its that last 20 whp you want that starts to push things.

Clark

Last edited by V8killah91; 08-25-2007 at 03:40 PM.
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Old 08-25-2007, 05:57 PM   #16
V8killah91
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Dyno charts added...
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