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wilsonp · 01-04-2011, 05:54 PM

The ratios and final drive ratio for auto and manual are entirely different, which may explain some of the difference. The 7AT is geared lower which means you have to shift sooner, so it loses effective torque while accelerating earlier than the 6MT but it puts more torque down which seems to balance it out.

1st gear is short and second gear is extremely short in the 7AT - you stay in it for 19MPH versus 26MPH for the 6MT, then the 7AT gears are longer.
(6MT: 41/26/28/27/39 - 7AT: 36/19/31/39/51)

I don't believe dyno tests show a significant difference between the two - 370z.com Magazine shows 7AT stock at 267hp / 220 ft-lb versus a 6MT stock at 262hp / 210 ft-lb (different days, same dyno), so the 7AT really gives up nothing at the wheels either.

01-04-2011, 05:54 PM	#11 (permalink)
wilsonp A True Z Fanatic Join Date: Jul 2010 Location: Virginia Posts: 1,134 Drives: 2009 Touring Sp Nav Rep Power: 16	The ratios and final drive ratio for auto and manual are entirely different, which may explain some of the difference. The 7AT is geared lower which means you have to shift sooner, so it loses effective torque while accelerating earlier than the 6MT but it puts more torque down which seems to balance it out. 1st gear is short and second gear is extremely short in the 7AT - you stay in it for 19MPH versus 26MPH for the 6MT, then the 7AT gears are longer. (6MT: 41/26/28/27/39 - 7AT: 36/19/31/39/51) I don't believe dyno tests show a significant difference between the two - 370z.com Magazine shows 7AT stock at 267hp / 220 ft-lb versus a 6MT stock at 262hp / 210 ft-lb (different days, same dyno), so the 7AT really gives up nothing at the wheels either. __________________ 2014 Cayman S PDK Sport Chrono White/Black Was 2009 370Z Touring Sport+Nav 7AT Metallic Black/Persimmon Was 1991 NSX Auto Black/Black Last edited by wilsonp; 01-04-2011 at 06:16 PM.