Re: After market suspension - Saab 900 Bulletin Board - Saabnet.com
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While I have no recommendations regarding springs, settings for the shocks will depend in part on the stiffness of the springs themselves.
What is the end goal for this project? Street car or something for the track? Is ride comfort an issue, or is improved handling performance the main criteria?
If you are diving in as deep as replacing shocks and springs, then I would suggest full suspension bushing replacement, rubber or poly (or a mix), depending on your needs and budget. Probably wouldn't hurt to check the steering rack, tie rods and ball joints as well.
Given the SPG's factory lowered suspension, I would also suggest relocating the rear axle and installing an adjustable Panhard bar, to correct issues caused by lowering the suspension.
I would be hesitant to set the Koni's at full hard to begin with, as this would likely make for harsh ride characteristics on the street, though perhaps that might suit certain dedicated applications.
For reference, Blacksheep, my '93 900T CE, has the same factory lowered suspension as your SPG. Suspension work includes full re-bushing (OEM rubber except for Powerflex Purple in the sway bars), Koni's (with 90K on them, currently set at 2 in the front, 3 in the back, originally 1/1), rear axle relocation, adjustable Panhard (track) bar, and 15x6 9000 wheels. The result is tight, very crisp handling at the cost of some ride harshness. Setup for both mountain roads and long haul road trips, it is a somewhat jarring ride, depending on surface conditions, particularly at slow speeds.
Generally speaking, handling improvements will come at a cost to ride comfort.
Good Luck with your project. Please let us know what you decide to do and how it turns out.
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