Pontiac Solstice Forum - View Single Post

A small turbo TT 3.4 DI would be sweet. The fix for the wieght issue is the use of the corvette style transaxle. Perhaps with a smaller transmission.

Im all for stacked planetarys w/clutchless shift. (like lenco's) They can be made very small in dia and lend themselfs kindly to a torque tube/transaxle layout.
Brutally strong, they can be used across the family line in anything that can fit a 6" dia tube thru. E-servo's or pwm controlled hydraulic pistons can control shift pressure.
I would suspect a 600ft/lb rating (@100% duty cycle) would be easily attainable from a 4.5" 4 pinion planetary set.
Since the final drive would likely be 2:1 (after 6 plantaried of reduction) the ring and pinion can be made to be very strong and compact, with a heavy-case helical stlye diff.

Also it doesnt matter what planetary is shifted as far as order goes, So it would be possible to have the computer select different ratio's for different gears to change the Rpm drop for differnt tracks.

If I had more money Id be dangerous....

	BaldTurboFreak Supporting Vendor Join Date: Mar 2005	A small turbo TT 3.4 DI would be sweet. The fix for the wieght issue is the use of the corvette style transaxle. Perhaps with a smaller transmission. Im all for stacked planetarys w/clutchless shift. (like lenco's) They can be made very small in dia and lend themselfs kindly to a torque tube/transaxle layout. Brutally strong, they can be used across the family line in anything that can fit a 6" dia tube thru. E-servo's or pwm controlled hydraulic pistons can control shift pressure. I would suspect a 600ft/lb rating (@100% duty cycle) would be easily attainable from a 4.5" 4 pinion planetary set. Since the final drive would likely be 2:1 (after 6 plantaried of reduction) the ring and pinion can be made to be very strong and compact, with a heavy-case helical stlye diff. Also it doesnt matter what planetary is shifted as far as order goes, So it would be possible to have the computer select different ratio's for different gears to change the Rpm drop for differnt tracks. If I had more money Id be dangerous....