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Old 11-30-2012, 09:07 AM
timothale timothale is online now
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welded wrong ?

When a suspension swap is done the frame should have been set at the planned ride height and angle that results from the tire sizes used. Castor angle has to work with King pin angle (a line thru the centerline of the ball joints) and the anti dive angle . When you turn the combination of those angle produces a chassis lift. different for each side. with the wrong castor angles, the chass is lift on the front corners is the opposite of the original intended design It can drive just fine straight ahead, but Might get to be a handfull on bumpy roads or when braking. With the anti dive angle, the front suspension adds castor when the front end comes down during braking. the goal is to have the effective castor the same. when the front end comes down the frame comes down reducing the castor angle , BUT the upper ball joints moves back because of the anti dive angle, adding positive castor back in. another question is how does it handle on fast hard corners ? does it want to over steer- or understeer or want to get away from you ? changing front to rear spring balance can help correct over-under steer ? an old friend is the retired head of Ford Racing, has written a lot of suspension design stuff on the Club Cobra Forums. just search bruce cambern's posts or #3170 ( His original Cobra number). HE smoked the 2009 optima With his much modified Cobra, won 3 Firsts and one second in the competition

Last edited by timothale; 11-30-2012 at 09:14 AM.
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