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Old 09-15-2005, 02:50 PM   #1
seekersix
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Member#: 62661
Join Date: May 2004
Chapter/Region: NWIC
Location: Everett WA.
Vehicle:
2008 STI
ASPEN WHITE

Angry Tuning an 04 4EAT WRX ?

Need help with tuning a 04 WRX with a 4eat...The car is at stage 4 and has a utec system ,but I can't find anyone (tuner) who KNOWS how to get the most out of the mods...I have had people from TXS andf Element look at it and tune some ,but always get stopped by the closed/open loop delay on fuel in the ECU ...I know there is more tha 270 whp in this car and that it can run faster and with more efficiency.....PLEASE ADVISE
BTW I live in Seattle
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Last edited by seekersix; 09-15-2005 at 03:13 PM.
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Old 09-15-2005, 02:55 PM   #2
crazymikie
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Chapter/Region: NESIC
Location: Hopkinton, MA
Vehicle:
2006 Honda El Camino
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I might be able to help you out:

http://forums.nasioc.com/forums/showthread.php?t=846228

Shoot me a PM and maybe we can get you set up.


Mike
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Old 09-15-2005, 03:19 PM   #3
seekersix
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Join Date: May 2004
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Location: Everett WA.
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2008 STI
ASPEN WHITE

Default 4eat Tune

Mike I pm'd ya
Carl...seekersix@comcast.net
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Old 09-15-2005, 03:51 PM   #4
Zumble
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Location: NY
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2005 Forester CGM

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Maybe PM RiftsWRX. He has a pretty hopped up automatic WRX and he's a tuner that knows UTEC.

Quote:
Originally Posted by seekersix
Need help with tuning a 04 WRX with a 4eat...The car is at stage 4 and has a utec system ,but I can't find anyone (tuner) who KNOWS how to get the most out of the mods...I have had people from TXS andf Element look at it and tune some ,but always get stopped by the closed/open loop delay on fuel in the ECU ...I know there is more tha 270 whp in this car and that it can run faster and with more efficiency.....PLEASE ADVISE
BTW I live in Seattle
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Old 09-15-2005, 04:10 PM   #5
scooterforever
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2002

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Crazymike - I think the issue Seekersix is running into is specific to 4EAT's and UTECs. The problem is, in rough terms from my very limited understanding, the TCU takes over fueling during the shift. This fights with the UTEC's OL/CL switchover. You can end up burning out the clutchpacks if you don't let the TCU control things.

Edit: wait, I read the original post again, and maybe that OL/CL delay is the issue. I'm confused. Seeker -- is the '04 OL/CL delay the issue, or is it the UTEC's handling of fueling versus the TCU?

Last edited by scooterforever; 09-15-2005 at 04:17 PM.
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Old 09-15-2005, 04:13 PM   #6
scooterforever
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Quote:
Originally Posted by seekersix
I know there is more tha 270 whp in this car and that it can run faster and with more efficiency.....PLEASE ADVISE
BTW I live in Seattle
We need a full mod list too. Don't underestimate the drivetrain loss from the transmission. It's huge. Rather, it's not so much loss, but the transmission will tend to lower your peak WHP and spread it out across the curve. Makes the car faster than the dyno numbers would indicate. At least that's my experience with a modd'ed TC.
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Old 09-15-2005, 05:54 PM   #7
seekersix
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Location: Everett WA.
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2008 STI
ASPEN WHITE

Smile 4eat Tune

Yes it is indeed the ol/cl delay from OEM ECU and not the fault of the UTEC
It(UTEC) has been exploited to the edge but still can not over come the ECU
Most recommend to reflash back to the 02 4EAT version ECU (which dosen't seem to have the delay problem ) then retune via the UTEC....That will cost BEAU COUP BUCKS (1 to reflash and 2 to dyno time)

List of Engine mods as follows : Perrin up pipe/down pipe(wrapped) Perrin TMIC with perrin hoses,Perrin front Pully,Perrin short ram w/K&N filter,Perrin turbo inlet hose
Greddy EVO2 exhaust (dpipe back)
HKS headers (4 into 1 wrapped)
STI pink injectors
Walbro Fuel pump
IHI VF35 turbo(ported waste gate & polished)
TXS MBC
KOYO radiator
B&M trans cooler
Level 10 Hi stall TC
TXS UTEC w/remote (stage 4 map)
I hope this helps ,but if not ask me more questions OK?

Last edited by seekersix; 09-15-2005 at 08:42 PM.
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Old 11-07-2012, 11:56 AM   #8
02 banana owner
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I hate to thread jack but I just converted my 02 5spd to a 4eat and With the turboxs unit that I have you can not tune. So I have taken it off and running a stock tune. The car is stupid slow right now, bogs, stumbles...blah blah blah.

My question is this. Does anyone have an open source tune that I could dump on my ECU so the car is drivable? Mod list is this:
APS front mount with silicone piping, Greddy type R bov, model DR 725
APS CAI HFA/01
APS exhaust bell, APS hollowed cat, HOE/R2
APS full 3in to axle then 2.5 to muffler.
Stock turbo
Stock fp
stock injectors

Last edited by 02 banana owner; 11-07-2012 at 12:02 PM.
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Old 11-16-2012, 05:35 AM   #9
02 banana owner
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Blaze yellow

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Anyone got any ideas on this? Really could use some help on this.
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Old 11-16-2012, 06:36 AM   #10
subieguy87
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Quote:
Originally Posted by 02 banana owner
I hate to thread jack but I just converted my 02 5spd to a 4eat and With the turboxs unit that I have you can not tune. So I have taken it off and running a stock tune. The car is stupid slow right now, bogs, stumbles...blah blah blah.

My question is this. Does anyone have an open source tune that I could dump on my ECU so the car is drivable? Mod list is this:
APS front mount with silicone piping, Greddy type R bov, model DR 725
APS CAI HFA/01
APS exhaust bell, APS hollowed cat, HOE/R2
APS full 3in to axle then 2.5 to muffler.
Stock turbo
Stock fp
stock injectors
How many cel codes are you getting?
And mind you, you shouldn't be driving it that way without a tune.
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Old 11-22-2012, 02:30 PM   #11
02 banana owner
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Location: Kalamazoo Michigan
Vehicle:
2002 WRX
Blaze yellow

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Im getting low voltage on one of the tgv's and system lean.
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Old 11-22-2012, 02:31 PM   #12
02 banana owner
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Location: Kalamazoo Michigan
Vehicle:
2002 WRX
Blaze yellow

Default

oops forgot to add in I got a tune from a buddy here in town but it still needs tweaking.
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