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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 08-13-2007, 07:05 AM   #1
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Nordic stg 3 from 94 900 in 99 9-3

Would a nordic ecu from a 94 t work in a 99 lpt? How will it run w/o all the other stg 3 stuff; exhaust, airfilter, bigger intercooler?
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Old 08-13-2007, 07:12 AM   #2
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Being that they are both T5 ECU's in theory they should work. But I know there are 2 different T5's (5.2 and 5.5) and not sure if those are fully interchangeable.


Now onto running a Stage 3 without the rest of the mods.... not a real good idea. The ECU is tuned to run with a certain set of H/w mods to support the extra boost, fuel needs, etc.....


By not running the additional h/w you are basically forcing the car to try and run at a Stage 3 with stock h/w and that is a bad thing IMHO.
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Old 08-13-2007, 07:23 AM   #3
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I thought trionic had a large range of adaptation to mods. noric stg 3 only really requires the exhuast and I guess the air filter (intercooler recomended).
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Old 08-13-2007, 08:37 AM   #4
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You could try it, and royally mess something up, or it will work fine.

My bet is that somethings will work, but most other stuff wont.
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Old 08-13-2007, 09:25 AM   #5
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Skip the ecu, get the hardware you need, then get stage whatever your hardware allows.
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Old 08-13-2007, 09:44 AM   #6
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I thought trionic had a large range of adaptation to mods. noric stg 3 only really requires the exhuast and I guess the air filter (intercooler recomended).
A tune takes a good portion of trionic's flexibility away - it's already pushing the envelope. Running a tune that requires specific hardware without that hardware is begging for trouble. Do things the right way: start collecting hardware (you'll still get decent gains on stock software), and once you're at a comfortable place hardware-wise buy a tune specific for your hardware on your car.
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Old 08-13-2007, 10:08 AM   #7
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It's great to try new things, but you could possibly burn up your pistons and valves if you don't have the right hardware.

If you're dead-set on trying it, get yourself a wide band air/fuel setup and install an EGT setup in front of the turbo. Also, Vigge's tubing trick running through the firewall to listen for knock probably wouldn't be a bad idea either. That way you can try the software and know when to backoff. Get some instrumentation so you don't cause any expensive damage and give it a try!

Like Steve said too, there are different revisions of T-5 too, don't know if they're interchangeable.
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Old 08-13-2007, 10:18 AM   #8
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If the stages didnt really rely on the hardware, there would only be 1 or 2 different tunes. But since they do, thats why there are at least 5 before you go custom tuning. I still suggest that you get the hardware first, theres no reason to try to push it.
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Old 08-13-2007, 10:20 AM   #9
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If you're dead-set on trying it, get yourself a wide band air/fuel setup and install an EGT setup in front of the turbo. Also, Vigge's tubing trick running through the firewall to listen for knock probably wouldn't be a bad idea either. That way you can try the software and know when to backoff. Get some instrumentation so you don't cause any expensive damage and give it a try!
Wideband A/F gauge with the o2 sensor is what atleast $200? EGT is another $150ish including the probe? There is atleast the money for the DP with a cat right there...
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Old 08-13-2007, 11:01 AM   #10
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Wideband A/F gauge with the o2 sensor is what atleast $200? EGT is another $150ish including the probe? There is atleast the money for the DP with a cat right there...
Well sure, but a downpipe and cat won't tell you your EGT and WB AFR.

edit: It's not unheard-of that a mailbox tune blows an engine, especially one made for a different variation of hardware.
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Old 08-13-2007, 11:15 AM   #11
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The 1994 would be an OBD-I while 1999 is OBD-II. The 1994 ECU won't know anything about your rear o2 sensor, evap canister pressure sensor and other emission related stuff. It might work though.
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Old 08-13-2007, 11:25 AM   #12
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Sounds like it isn't a good idea to try it on th 9-3. My friend and I just wanted to test it on his 9-3 w/o swapping all the hardware over.

I got the 94 for parts. The plan is to swap the engine, trans, and all perf. goodies over to a 96 auto or a 98 auto. What kind of issues would there be with this? ...tranny, obd-I vs II, instrument gauges etc
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Old 08-13-2007, 01:58 PM   #13
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you can't install the ECU from a 94 into a post 94. the 94 (motronic) won't work in an obd II car. I had a 94 ECU at my disposal and I called Nick T wondering if I could use that as my ECU core for the tune and then have my OEM one around if I wanted to revert back to stock for any reason. He said they aren't interchangable.
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Old 08-14-2007, 01:38 AM   #14
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sry to thread jack. but will a 96 ecu work in a 9-3
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Old 08-14-2007, 04:07 AM   #15
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I believe as long as you have an OBD 2 ecu then you can pop that into a 99 9-3 t5 car. Only thing I don't know about though is the TWICE and whether or not that will give you some headaches.



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