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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 12-27-2007, 09:25 AM   #1
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How does it work and what does tuners are doing to it? Is engine safety counted for with T7, and are the tuners keeping the safety features when tuning. Is their knock sensitivity in the T7 software and does tuners keep it at stock level.????? I see more newer Saabs with blown engines than older Saabs why is that? I even seen tuners blow engins while tuning.... ooops.
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Old 12-27-2007, 09:46 AM   #2
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Quote:
Originally Posted by 900AERO View Post
How does it work and what does tuners are doing to it? Is engine safety counted for with T7, and are the tuners keeping the safety features when tuning. Is their knock sensitivity in the T7 software and does tuners keep it at stock level.????? I see more newer Saabs with blown engines than older Saabs why is that? I even seen tuners blow engins while tuning.... ooops.
First off I thought this car was staying stock. Second off the blowing of the engines I believe is with custom tunes. Let not let this turn into a tuning flame war. I think you should be fine with say a Nordic or SQR mail box tune for example. (not forgetting BSR Abbott Maptun JSP)
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Old 12-27-2007, 09:48 AM   #3
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The reason why you see more t7 saabs with engine problems is due to a couple things. One being lightweight pistons, rather than beefier units. Another is the downpipe that runs right past the oil pan and pick up screen. Lots of other things as well, like the bad PCV systems. Update #6 seems to be the final update, and from what everyone says, it works very well.
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Old 12-27-2007, 10:02 AM   #4
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it seems like the b235 (t7) engines pistons are weaker than the b234 (t5) so they like to melt easier?
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Old 12-27-2007, 10:27 AM   #5
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It is possible to blow any engine if you tune it and the car is not in tip top shape. The issues that are listed above are definatly huge factors in tuning mishaps that you hear about.


The things to watch out for when you tune are as follows.

1. Air/ Fuel Ratio -- Get a Wide band and a dyno to verify

2. EGT's -- get a decent EGT gauge

3. General Maint. -- Make sure you keep the car well repaired.

4. Hardware - Make sure you run all the HW that the stage requires so that you are being as safe as possible.


Follow those guidelines and you will be fine in 99% of the cases. Things happen to all tuners but dont let that stop you from going forward. The phrase is " You have to pay to play" and with that said something will inevitably go wrong be it minor or major at some time so just expect it and you wont be suprised.
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Old 12-27-2007, 12:13 PM   #6
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Some of the cars with blown engines/broken pistons have been totally stock, so it hasn't only been with tuned cars. As others mentioned the stock pistons are not as robust as they could be. Besides sludged motors it appears that the AFMs going out of spec have contributed to the damaged engines.
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Old 12-27-2007, 12:28 PM   #7
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Some people like to gloss right over the required maintenance stuff and go for broke on go fast bits, or just flat out ignore the maintenance as the case with stock cars that go eat a motor.

Have the oil pressure checked, make sure the car is running a safe A/F under all conditions keep the oil changed and you should be in pretty good shape!
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Old 12-27-2007, 03:07 PM   #8
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what about knock?
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Old 12-27-2007, 05:40 PM   #9
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Ever saab turbo (and even several saab non-turbos) imported to the USA since the early 1980s has knock sensing, they aren't going to stop with T7.

As far as weather or not tuners lower the knock threshold, I would suggest asking them yourself, that would be the most reliable and easily attainable answer. All you are going to get on a forum is hearsay and speculation on that sort of thing.
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