Originally Posted by
BadSign
I have 2 roll center questions, if anyone can help. It's been 10 years since I ran pan cars, and that was on an oval:
1: Where is the roll center on the rear of the car, on the middle of the axle, at the lower pod plate, or in some mysterious nether region I'm unaware of?
2: Does raising the hingepins on the front end lower the front roll center?, and won't this allow more roll? Will this be better in larger or tighter corners?
Thanks!
1. Like Desert Rat said.
2. Raising the hinge pin does not alter the roll center on suspension with a fixed lower arm. Think of the lower arm as an infinitely long (pivot point to pivot point) lower suspension arm that is parallel to the ground. Changing the upper arm angle will cause a line drawn through it to intersect the lower arm's line at a different point. This is the instantaneous center of rotation. This changes the camber curve. Raising the hinge pin or lowering the outboard ball reduces camber gain. This along with the necessary increase in static camber to allow even tire wear will make the car feel smoother to drive.