Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Not Just Engines, but Transmission will Make a World of Difference

aerohead · 06-09-2009, 02:37 PM

I think Lexus is up to 8-gears now.Mercedes has a 7-spd.-------- According to SAE,a 12-speed tranny offers the same BSFC efficiency as a CVT.I've not seen any remarkable mpg from the cars with CVT,as was promised in articles extolling the virtues of the Van Dorn transmission.I hope they can get it right,or get the 12-speed out.A tranny like that won't need to be bullet-proof and massive as the engine can just stay in the sweet-spot,crankin' out h.p. and torque with gentle splits between gears.

06-09-2009, 02:37 PM	#9 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 16,312 Thanks: 24,439 Thanked 7,386 Times in 4,783 Posts	gears I think Lexus is up to 8-gears now.Mercedes has a 7-spd.-------- According to SAE,a 12-speed tranny offers the same BSFC efficiency as a CVT.I've not seen any remarkable mpg from the cars with CVT,as was promised in articles extolling the virtues of the Van Dorn transmission.I hope they can get it right,or get the 12-speed out.A tranny like that won't need to be bullet-proof and massive as the engine can just stay in the sweet-spot,crankin' out h.p. and torque with gentle splits between gears.