Thread: Chassis Setup
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Old 07-24-2006, 06:07 AM
Mike Simard Mike Simard is offline
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Join Date: Nov 2003
Location: Dacula, GA
Cobra Make, Engine: Porsche 928 S4
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Aside from the usual toe and camber settings, you'll want to know that you have no bumpsteer. I apologise if I'm stating the obvious but bumpsteer is when the front wheels toe in or out during wheel travel, most noticable as darting under hard braking. Bumpsteer is adjustable by moving the steering rack or tie rods up or down. It would also be nice to verify that you have a little camber gain with wheel travel while you're checking things. A typical Cobra has relatively short control arms and is therefore sensitive to instant center/roll center point changes from the ride height being unoptimal. It's a good idea to consider the suspension geometry when setting ride height and not just ground clearance. For the rear suspension you want zero toe to toe in, you also want the wheel to toe in under suspension compression if anything and NOT toe out. Another book recommendation is Chassis Engineering (I think) by Herb Adams, it has a cute method of checking bumpsteer using stuff lying around.
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