Staged ecu + stock turbo? Questions - The Saab Link Forums

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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 07-22-2009, 07:46 PM   #1
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Staged ecu + stock turbo? Questions

First off I was wondering if anyone knows from personal experience how JZW stage 1 ecu performs...I mean for 200 bucks + shipping & handling, it seems a little too good to be true...Next I was wondering if an ecu upgrade increases boost pressure or if it just remaps the air to fuel ratio monitored by the t5 management system...I am assuming it doesn't affect boost pressure seeing that the t25 is internally wastegated to only a XX amount of lbs. Lastly I was wondering what a 99 9-3HOT runs stock for psi and what is the max level of psi you can safely run on a t25 without blowing seals or anything?

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Old 07-22-2009, 07:48 PM   #2
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JZW has gotten some very good reviews. No scam, that's for sure.
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Old 07-22-2009, 07:50 PM   #3
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how long a t25 will last depends on how hard you push it...

I am not sure if/how high a stage1 JZW will push up the boost. I can tell you that I have been pushing 16+psi on the t25 for a few weeks, and many others have done it longer.


I figure push it till it blows, then go bigger.
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Old 07-22-2009, 08:34 PM   #4
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I've had my stage 3 tune in my car for exactly 2 years and I just removed the turbo yesterday to find lots of shaft play and oil. It's something that's kinda expected when you push it 100% like that.

Not sure how hard it's worked for a stage one tune, though. I'm sure he'll chime in and give you all the details you want.
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Old 07-23-2009, 08:09 AM   #5
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i have a stage 2 pushing 16-19 depending upon throttle postion etc.. and have no problems. had this ecu turbo set up since Carlisle and have no problems as of yet. I drive it hard too...
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Old 07-23-2009, 08:11 AM   #6
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i've got 2 cars running jzw tunes (my ng900[td04 stg4] and my dad's 9-5 linear[td04 stg3 auto]).

both are awesome, and i highly recommend
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Old 07-23-2009, 08:15 AM   #7
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My previous setup was JSP stage 3 and the turbo was still churning when I replaced it with a TD04 at stage 4.

Im now at stage 5 with a stock T25 bored out and rebuilt to a "big" T28 and Im currently running 18 psi on that at 275whp. So these turbos arent given as much credit as I think they deserve, but you should make sure that your turbo is in decent shape BEFORE you tune it if you are truely interested in making that baby last.
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Old 07-23-2009, 11:50 AM   #8
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wow thanks..those jzw looks nice for a conservative tune...I only want stage one for now because I don't want to push the turbo too much..still in the process of acquiring another turbo
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Old 07-23-2009, 12:52 PM   #9
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wow thanks..those jzw looks nice for a conservative tune...I only want stage one for now because I don't want to push the turbo too much..still in the process of acquiring another turbo
just go for stage 2 you know you want it. heck i had it with stock IC stock DP etc.. just a GS intake. and you can get a conservative stage 1 tune. plus might as well do it now as then you will be set for a longer period of time instead of getting all hot for stage 1 but not having the little extra stage 2 gives...
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Old 07-23-2009, 03:06 PM   #10
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Like nowhereman said, stage 2 will not be that much more than stage 1. Its really not stressing the turbo, and those are the safest levels you will be in when it comes to tuning.
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Old 07-23-2009, 03:13 PM   #11
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its not whether I want it or not...just worried about blowing seals on my turbo before I have a replacement...I talked to my local saab mechanic and he said that stage 1 should be fine...but if I really want more than that than I better plan on bigger injectors, fuel pump etc..
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Old 07-23-2009, 03:31 PM   #12
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You only need bigger injectors and more supporting mods at stage 3+ and up. You can run stock injectors and everything else up to stage 1-3
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Old 07-23-2009, 03:44 PM   #13
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I'm running a stage 2 tune with a stock turbo and exhaust. It's fine. I get 18psi at the most. Seems like good fun too.
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Old 07-23-2009, 04:03 PM   #14
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its not whether I want it or not...just worried about blowing seals on my turbo before I have a replacement...I talked to my local saab mechanic and he said that stage 1 should be fine...but if I really want more than that than I better plan on bigger injectors, fuel pump etc..
is your local saab mechanic is saabworks?
i just droped a 2002 Aero off there today.. going to be bringing my tally in soon for some diagnostic coolant vanishing problems.


you should be fine with stage 2 right now. i mean really i tool on my car with over 150k on it and no worries on the turbo. 18psi now too... really stage 2 will not hurt you anymore than stage 1.

trust us we have done it and wouldn't lie to you just trying to save you money.
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Old 07-23-2009, 05:21 PM   #15
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You dont really need injectors at stage 4, I ran stage 4 for about a year until I went for stage 5 and bigger injectors. But regardless, you will always regret not going for the setup you really want. I wish I could take back the good amount of money I spent on all the intermediate steps I took, I would have gone straight to where I am now if I knew what I know now.
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Old 07-23-2009, 06:18 PM   #16
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is there a real definition of 'stages' somewhere for these cars? or is it just as abritrary as it tends to be with other cars
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Old 07-23-2009, 06:19 PM   #17
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nomadtw - http://www.jzwtuning.com/products.html

And this is only JZW tuning. there is still nordic, bsr, etc...
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Old 07-23-2009, 06:56 PM   #18
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Stages are not really a definitive list, but each stage represents a combination of modifications.
Stage 1: ECU
Stage 2: ECU and Cat-back exhaust
Stage 3: ECU, full exhaust, intercooler
Stage 4: ECU, TD04, full exhaust, intercooler

After that, all the rest of the 'stages' are more unique as there are more setups you can choose from.
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Old 07-23-2009, 08:55 PM   #19
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Stages are not really a definitive list, but each stage represents a combination of modifications.

Stage 2: ECU and Cat-back exhaust
Stage 3: ECU, full exhaust, intercooler


After that, all the rest of the 'stages' are more unique as there are more setups you can choose from.
fail...

Stage 2 ECU can be run on a stock car.
Stage 3 can be run on a stock car with only a 3in DP and ECU. Instant heatsoak (just ask PoisonBeef) but still...

An Open Air Intake is never required for any stage. Its just for the sound.
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Old 07-23-2009, 08:56 PM   #20
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running even stage 1 on a stock car is stupid as fuck.
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