I dont get it, you should be at 2.2 or so. For a better 60 ft other than driver error, adjustable rear struts, solid engine mounts, chassis stiffening, traction bar and a clutch/flywheel will help.

If your car isnt "bouncing" going in and out of grip violently, and your wheels arent spinning (no squel) then I dont have a clue. Even when I was in the 15+ my 60 has always been 2.2, problem is I still am and I should be at a 1.9