Quote:
Originally Posted by Wil Ferch
Gordon says..."It makes sense that a wider wheel, or one with more offset, would create more leverage on the torsion bar. The result is a softer sprung car...."
Yes..for the front. The TB runs longitudinally with the car. Wider wheels or track will impart more leverage and create a softer "effective" wheel rate.
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Not claiming to know much about setting up a 911 suspension...
If I draw a freebody diagram of a front A-arm & knuckle, and pretend the front A-arm is horizontal, how does a longer spindle (ie. tire with greater offset) change the spring rate? The vertical force at the tire patch must be equal to the vertical force at the balljoint (assuming the strut does not carry vertical load). The longer spindle will cause a greater overturning moment on the knuckle, which can only be reacted by a lateral load on the lower A-arm and on the top of the strut... so how would a longer spindle change the spring rate?
Is it the compliance effects of the knuckle and chassis structure that make it softer? (Can't be the bushings, everyone has PB in their car
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