Quote:
Originally Posted by msl82
I will be really surprised if the Auto is faster than manual. I think the manual is faster because,
1) 370z auto transmission is not same as BMW M class, or any other supercars. I have heard that there is little bit of lag between gear shifts.
2) Auto loses more whp than manual. it is usually 15% loss for Manual, and 20 - 25% loss for Auto.
3) Auto 370z weighs more than manual one.
By the way, the Syncro Rev also helps in upshifts for the manual in which it holds the rpm for couple of mini-seconds, just enough for the smooth gear shifts and continous flow of power between gears. I think this is very advantageous feature because, there seems to be No loss of power through upshits with no Jerking. Syncro Rev is simply amazing...
Until I see the factual test numbers of 0-60, quarter miles...I think the manual is still faster than Auto.
What do you guys think?
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Actually, the auto now has a multi-disc (5 I think) 100% lock-up torque converter. The power loss through the drivetrain will be less than typical. I suspect a 7HP difference between the MT and AT. Nobody has dyno'd the AT yet, though. The reason there will still be power loss is that an AT has a lot more spinning mass. So the manual will be more efficient, whereas the the AT will have the better launching gears... In addition, the AT has the ability to torque up. A manual CANNOT do that without a transbreak.
The AT will be faster in the quarter, I'm about 90% sure on that. I race both AT and MT and I'm pretty confident that with the ability to launch with torque already at the wheels and the limited amount of power drain through the auto, it should be a quicker run. I can shift a car in the 300ms range without a problem. I look forward to power shifting the Z and seeing how fast I can REALLY get it to run the 1/4, so I really think it will come down to standard MT drivers being slower than the AT, and drivers that SLAM and power shift will be faster than the AT..
On the freeway, the MT will likely win. That 7th speed doesn't help with the gear ratios, and the final gear on the MT will make a huge difference. Control is everything though. It may be down to the drivers.