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Discussion Starter #1
As some of you might know I also have a highly modified Evo4 pushing out over 400bhp.
My point is that in my evo, to maintain engine safety and optimum performance, I had to change my std ecu to a programmable motec ecu.
With this a specialist had my car for over a week to program the ecu for economy and optimum performance, especially torque, which was all my modification was all about.
What I'm tryiny to say is:
* can this sort of ecu be used in the Aero
* if not, why?
* if yes, has anyone used one
I'm asking because I'm thinking of modifying my Aero now, after great satifaction of driving it for a long while now as std.
I also ask, because in the evo scene, the word is that a correctly programmed ecu on its own gives a car far more, and better all-round performance than any bolt on performance kits.
Although it helps, because I have loads in the evo.

Thanks in advance to your replies, which I greatly look forward to.

Regards


Tony
 

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…and I’ll start.

Reprogramming of ECUs is how most of us have gained higher performance from our Turbo engines. Anything else on top of this tends to be a marginal increase by comparison, although if you venture in to powers above about 280hp you do need to be thinking of at least some exhaust mods. Beyond 300hp you will also need bigger injectors.

However the ECU remains “standard” in hardware terms but has the software mapping altered. Saab’s Trionic system is fairly unique in that it is a single ECU that controls all the parameters- boost, fuelling, timing etc. By doing this very reliable power increases can be had.

There are several companies who will carry out this sort of work for you- normally on an ECU exchange basis. The ones most familiar to us here are Abbott Racing, Maptun and Speedparts.

On your Aero, without changing anything else and just changing the ECU programming, you can reasonably expect to add about 40hp and 50lbft of torque.

HTH
 

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Even more interesting would be to find out whether Trionic was retained on the 750hp 2.0L unit in Per Eklunds Pikes Peak Hillclimb 4x4 Viggen or either of his slightler less powerfull 4x4 9-3 Rallycross cars.......????
 

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Tony,

I don't see why you couldn't use a stand alone system, however, as the others already mentioned, the Trionic system is a great piece of equipment. If you do all the hardware mods to match, i.e. exhaust, intake and such, the tuners should be able to get you an Trionic program to do the job. Heck, Hirsch custom programmed my ECU in just a matter of hours with the car on their dyno. And that was when they had yet to ever touch a US spec 9-3.
 

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Originally posted by aeropilot:
[qb]Even more interesting would be to find out whether Trionic was retained on the 750hp 2.0L unit in Per Eklunds Pikes Peak Hillclimb 4x4 Viggen or either of his slightler less powerfull 4x4 9-3 Rallycross cars.......???? [/qb][/b]
Trionic has been tossed away from that car, the car uses an engine management system from GEMS.

And to the original poster. Usually it is not possible to change the engine management on new cars, because the box is also used to control, abs, tcs and so on. Some engine management companies provide "special" harware along with the management system so you can get all the other stuff to work as well. I dont know for sure, but I believe you wont find one for saab.
 

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Discussion Starter #10
Thanks all for your input,
it is nice to know that the trionic ecu is
such an advanced system and con still be maintained and re programmed for higher output.

I've just enquired about a speedparts stg 3, but they are unsure at the moment wether my 93' ecu is compatible with the mod. i've given them my vin number now for them to verify this for me.

Does anyone know of anyone with a 93' CS Aero
who has had this problem, and what are the differences in my Trionic ecu compared to the later models?

Oh well hope there is good news to follow.
I'll let you know of my findings when they come.

Cheers

Tony
 

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Tony, here in the 'states, the '93 was a transition year for Saab. However, as the Aero appeared mid-'93, every Aero I've seen has the T5 Trionic. An easy way to tell is to remove the 'aquarium' cover and look at the connector to the Trionic. If it's a 70-pin connector, then it's a T5, which is essentially the same box that's on all later 9000's. Also, the T5 is only an engine management controller and gives output information to the EDU. The TCS & ABS, on 9000's, are controlled by separate boxes. Anyway, if you find that you have a T5 Trionic in your Aero, then Speedparts will have no problems tuning it - nor would MapTun
 

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The first generation Trionic (MY93) is more difficult to reprogramme than the ones from MY94, and many tuners do shy away from it. ISTR this is because the first ones have the chips soldered directly to the board and they cannot easily be removed whereas later ones have them in sockets...

It may be worth getting yourself a spare S/H unit, which can be picked up for about £150-£175. That way you can send the "spare" off to get reprogrammed.

Edit- to follow up on Robert's post, all T5s are not the same! There are at least 4 different versions of the ECU that I know of and they are not interchangeable:

MY93 non TCS
MY93 TCS
MY94- non TCS
MY94- TCS


HTH
 

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Mark, all T5's are essentially the same. They're not exactly the same, but the only differences are in the memory chips. They all have the same Motorola microcontroller, the 68322, IIRC. Ask BillJ - he's disassembled a box and looked inside. My '98 B234R engine has a '94 CSE T5 controlling it - the only difference is the fuel, ignition, & OBDII functions which Fredrik @ MapTun burned into the new memory. Here in the 'states, all Aeros have the T5 box in them.
 

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Discussion Starter #14
Thanks Robert and Mark for your comments.
Both your comments are helpful, my '93 Aero does have TCS which most probably causes more probs when trying to upgrade the performance of my car.

I'm still awaiting from Elkparts with my ecu query.
Let you know what happens

regards

Tony
 

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Discussion Starter #15
Well I found out today from Elkparts that my car was indeed a model 93, and they are unable to offer me any of their upgrades.

They did give me an option of sending my ecu to Sweden for reprogramming, but would mean that my car would be off road for the duration
and I've yet to ask how much the reprogramming would be. Oh Bother!!

Phoned Abbott Racing after that and they said that they had no problems with my model year and would cause them no problems.

So it could be to speed more money with Abbott, which I suppose is local to the Uk and they would do the work on the car.

or

Send my ecu off for reprogramming which I suppose I could get it reprogrammed for more power than what abbott would do?

May as well send the ecu off to Maptun?

Too many questions, not enough answers.

What if any, Recommendation can you Saab Tecs advise.

Need to know my best option before I commit myself to a certain ecu, etc upgrade.

Answers please, if you can help.

Many Thanks in Advance


Tony
 

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Tony, has anyone actually looked at the ECU and determined exactly which one you have? What month in '93 was your Aero manufactured. As I mentioned above, here in the 'states, Aeros came out mid-year and they all had T5's. There's less than a dozen screws that hold the aquarium cover on - I strongly suggest taking the cover off and determining, for sure, what box you have. If the connector that attaches the wiring harness to the ECU is a 70-pin connector, then you have a T5. As for which tuner you want for reprogramming, I wouldn't hesitate in recommending MapTun - very professional outfit and if you ever decide that your
isn't enough, they'll reprogram again for a nominal amount (10% , IIRC).
 

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Originally posted by SuperEvo4:
[qb]Phoned Abbott Racing after that and they said that they had no problems with my model year and would cause them no problems.

So it could be to speed more money with Abbott, which I suppose is local to the Uk and they would do the work on the car.
[/qb][/b]
Would it be more money? When I got my CSE upgraded, it was cheaper with Abbott than anyone else (the prices on the website seem out of date). They do seem a little less aggressive on power than some of the others, but since I've got an auto, that was fine by me 'cos I'd like to not destroy the box
 

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Superevo4,

I too have a '93 Aero with the non flashable interior (practice T5 before the '94 main launch?).

But I've just bought a new 2nd hand '93 T5 box for £30 and will be sending that one to Sweden to be breathed on

Andrew
 

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Discussion Starter #19
Hiya all

Thanks for your input.
Scaero, could you tell me where you got your 2nd hand ecu from?

Can you fit a 94-97 aero ecu in a '93 aero, or is it not compatable?
 

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Originally posted by SuperEvo4:
[qb]Can you fit a 94-97 aero ecu in a '93 aero, or is it not compatable?    [/qb][/b]
Nope, there are the 4 different types I listed above and they are not interchangeable...
 
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