1 sec def isn't the synchro limit, there are MUCH faster 6mt shifts out thereStill 1sec for the shift. Faster than the other one, but still a 1sec shift. I think you are at the limits of the 6MT synchro's at this point. Frame of reference. Factory 6AT shift is .600sec, and an xHP Stage 3 6AT is .400sec. Factory DCT is about .050sec and an M3 GTS flashed trans is about .010sec.