[Ron Sutton]

Now I’ll throw you a curve ball. The static RC at ride height doesn’t mean much. It is the dynamic roll center “in dive” that really matters. “In dive” means when the front suspension is compressed & the car is in roll. So in the corner … when you have the front suspension compressed & the car is rolled over … all those angles change … and therefore the roll center moves. It typically goes down … and may migrate to the left or right of center. In the drawing below, the car is making a right hand corner … compressing the suspension 2” in the center and rolling over at a 3 degree angle.

Again, the colored dots represent the IC’s for the same color LCA/UCA. See how the IC’s move the swing arm lengths change? The black dot represents the dynamic RC in dive. Notice the RC is lower but also “migrated” to the left.

* We’ll talk about how to tune with Roll Centers in the final section.

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