No weight is not really a factor its just bhp v aero brick wall. Gain 100m at the start with less weight & that's only 1 extra second on the throttle at 210mph when you are deffo struggling to acclerate. Stability from the extra weight as speed goes over 190mph more than compensates. These cars were not put in a wind tunnel to see what happens at 190+mph they move about a lot is all I can say. The car will be slightly heavier I suppose but we always run fully loaded so it will make no difference.