Join Date: Jul 2007
Location: Fort Collins, Colorado
Ok some quick rules of thumb.
Upper arms, should be 70% of the length of the lower arms, give or take.
Mount the uppers on the axle above the differential, and the lowers flush with the tube. The seperation between the links at the body end should be half the measurment of the axle end, IE lower link to upper link on the axle end could be 10", the body should be close to 5" seperation height wise, if that makes sense.
It is best to mount the ends of the lowers as wide as possible on the axle, it creats stability and flexes better, just watch out for tire clearance. The angle of the tabs on the upper axle truss ideally is 22.5 degrees, same for the body side lower tabs if making a double triangulated 4 link.
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