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Performance Modifications for the Classic 900 This forum contains PERFORMANCE related Q&A's for the Classic 900. This may also include suspension.

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Old 02-27-2017, 05:12 PM   #1
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How much power on stock 5 speed?

I just recently purchased a commemorative edition 900 and I love it. I plan to do a 3in dp and a Swedish dynamics stage 4 tune with the red series injectors. It should put me somewhere around 240hp at the crank. Would that be too much for the tranny?
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Old 02-27-2017, 06:55 PM   #2
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I'm no expert on 900 trannys; los of people say they're made of glass. Depending on mileage and driving style, you should be okay. Rolling on the power and not hammering it through the gears probably has a lot to do with life expectancy.

I would recommend upgrading to a 9000 clutch kit to hold that extra power. If I recall correctly, a SACHS 9000 clutch safely holds 270hp. Only the 1990-1993 9000 turbo clutch will fit.
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Old 02-27-2017, 07:03 PM   #3
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Thanks for the info
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Old 04-18-2017, 08:20 PM   #4
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Any other opinions?
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Old 04-19-2017, 03:59 AM   #5
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From what I understand, anything over stock power is going to be too much for the trans. There are places that can upgrade them and strengthen them, but it gets pricey.
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Old 04-25-2017, 07:27 AM   #6
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There is no magic number but they do not handle power well at all. Combine that with any hard use or abuse and you would probably want to maintain a stockpile of them.

That said, ton's of people run a larger DP and tune and deal with the risk. Any of the later cars can handle more power but if you prefer the classic 900, you don't have any practical options to improve the transmission.
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Old 05-01-2017, 07:01 PM   #7
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Fluids...

I have the same setup you're gonna put together, in my car. Car easily pins the speedo @ 130 and still pulls hard. I don't EVER beat on the car, but I drive it fast on the occasion I find myself on a stretch of unoccupied highway. I had it bending the needle on Saturday afternoon. It's a well taken care of 90 SPG with 150ish on the odometer. 22 years of SAAB ownership now including 4 c900s that were all my daily drivers, and I've NEVER, (symbolically I'm now knocking on wooden desk top) smoked a tranny. Lucky? maybe, but I think stayin' on top of wierd engine bay noises, changing your tranny fluid whenever you change your motor oil, and just not driving like a douchebag all lend themselves to extending transmission life. Changing the oil and MTF is SO much easier than changing the engine and tranny.... Cheers! Bob
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Old 05-03-2017, 02:28 PM   #8
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Did the clutch start to slip or was it ok?
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Old 05-04-2017, 06:38 AM   #9
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If I were you I would stick with the 3" DP, injectors and FPR and an upgraded APC combined with a 9000 clutch and leave it. It's all simple stuff and hey, you'll never find an easier car to change a clutch on than a c900

One more complicated but better solution is to do the T5 swap and get rid of the APC system and stock ignition and fuel management systems. Up to you and your appetite.

Before you do anything make sure to do all the maintenance stuff: new plugs, fluids, air filter, vacuum lines, fuel filter etc.
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Old 05-04-2017, 03:34 PM   #10
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Quote:
Originally Posted by 1993saab900t16 View Post
Did the clutch start to slip or was it ok?
Clutch is fine and it's the one that came in the car, so I have no idea on age or wear...but it's not slipping. Also, it's 225-240 HP, not 400 plus HP. That 200-ish HP range should easily be handled by the stock clutch, unless you're an asshole who's constantly trying to burn your tires off the front of the car and trying to get 2nd gear to chirp as well. This much I am sure of: If you beat the car up, it will not tolerate it. Saabs are meant to be driven by gentlemen....that like to drive 150 mph , not by kids that wanna do smoke shows for their buddies...Opinions may vary, but 22 years of owning them tells me I'm right..
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Last edited by Edwardiangrey; 05-04-2017 at 03:45 PM.
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Old 05-06-2017, 01:57 AM   #11
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I remember when I put my first tweaked APC in almost 20 years ago (can't believe it's been that long!) my clutch slipped that day! However, the car had 140k on the original clutch and I was 18 yrs old

But I agree, the stock clutch should be fine unless it's in the last 1% of life like mine was. But no worries, you can replace it later if it starts to slip
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Old 05-07-2017, 06:58 PM   #12
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Thanks everyone for the help!
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