[1QuickS]

If you read Mark Donohue's book The Unfair Advantage you will see he was testing at Paul Ricard in a 917/10 and was asked to try the RSR. He said thew rear needed to be modified to raise roll center to minimize roll couple and to transfer more roll resistance to the front which would naturally help overcome the front/rear weight imbalance. Front roll center was dropped also. The Turbo took the RSR geometry & shortened the trailing arms also which I think also raised roll center a bit but the real benefit is causing more camber change as a result of body roll which keeps tire contact pattern better planted on the outside tire.