cure for Viggen torque steer? - 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 10-18-2013, 10:02 PM   #1
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cure for Viggen torque steer?

I just bought a 2002 Viggen. Even with TCS, it still torque steers badly. The car is bone stock, for now, with 130k on the odo. Is there anything that'll make it stop trying to dislocate my shoulder when I mash the pedal? I already plan on lowering it as the rear springs are cracked, and am pretty sure that will help. It's only manifested when I, a 30 year old man, try to impress my 11 year old nephew. So the obvious answer is to drive like an adult, but seeing as that's not gonna happen I think I need tips on modding the suspension/steering.
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Old 10-19-2013, 05:50 AM   #2
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search viggen rescue kit or torque brace
Parts for Saabs: NG900 97'-98' & 9-3 98'-02' Rack Clamp & Brace (LHD) gets cheaper when you put it into your cart since the US doesn't have VAT like the UK does
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Old 10-19-2013, 10:41 AM   #3
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Got it, thanks. That's kinda weird that the problem can be alleviated with a $100 part, and 30 minutes of install time. Thanks Saab.
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Old 10-19-2013, 10:54 AM   #4
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Genuine Saab makes one aswell , slight bend in the bar makes it a little better in my opinion and the pfs one makes a bit of a pressure on the clamp itself and they make you bore out a hole on the fender wall , why not just make it a smaller bolt to fit the hole that is already there ,but it does work and is about 100 dollars less than the Genuine Saab one
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Old 10-19-2013, 03:47 PM   #5
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torque steer can be amplified by worn out suspencion parts, Check bushings, ball joints, ect ect
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Old 10-19-2013, 05:02 PM   #6
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They all torque steer..

The steering brace helps..
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Old 10-19-2013, 07:30 PM   #7
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torque steer can be amplified by worn out suspencion parts, Check bushings, ball joints, ect ect
Yeah, the bushings, and joints are #1 or 2 on my to do list. Right behind changing oil, flushing the radiator, and any other maitainance stuff. This thing was NOT a daily driver for the last guy. So I figure something must be worn out. I knew TS would be there, this seems a touch extreme.
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Old 10-21-2013, 08:49 AM   #8
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or just do it right the first time and Install a quaife... no need for braces and lowering springs.

that little brace only helps a little... same with thicker roll bars, poly, and stiff springs. after all that it will still TQ steer.

then again if the car isnt at 100% id start fixing what is already broken.

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Old 10-21-2013, 09:41 AM   #9
 
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I'd be down with the LSD if I was never intending to see snow or ice again...

Wheel hop is no joke.
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Old 11-09-2013, 06:34 AM   #10
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I feel some torque steer still after installing the brace, but it definitely helped. Unequal length axles will have that always.
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Old 11-09-2013, 06:53 AM   #11
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Originally Posted by NeedForSwede View Post
Unequal length axles will have that always.
That's it right there.

I have Quaife LSD, Viggen rescue kit, 6-point brace, poly bushings all the way around, Koni shocks with Eibach progressive springs, larger front ARB from an SE, good ball joints...pretty much everything you can do short of the Sellholm arms, and there's still really bad torque steer (≈350 wheel HP).

If you want to make it more manageable don't increase engine power, learn to just steer it in the direction that you want it to go, and start hitting the gym to focus-on triceps and shoulders lol. You can make it better but it's always going to do it unfortunately.
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Old 11-13-2013, 07:07 AM   #12
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Wheels and tires also make a huge difference. Unfortunately, wide wheels, low offset, and performance tires are all bad for tramlining and torque steer. My Viggen with 35 mm offset BBS RK1 and summer tires is kind of a handful. Same exact everything but with 49 mm offset wheels and narrow tall winter tires, it's totally gone. The car corners poorly and looks worse but no torque steer at all.

Basically, the low offset wheels move the contact patch of the tire way outside the center of rotation of the strut, causing torque steer whenever the 2 sides don't have exactly equal traction. I love summer rims and tires but like everything they are a compromise.

Also, a lot of reports are that a LSD - which moves power to the wheel with more traction and thus increases the difference in traction between the front wheels - can actually make torque steer worse. But that's just my internet research, I have no direct back to back experience with and without a LSD on the same car with the same suspension, tires, wheels, etc.

x. 3 on the maintenance, bushings, etc.
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