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Old 02-03-2014, 07:50 PM   #3
OldJedi
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Drives: 2015 Corvette Z51, 2018 Porsche GTS
Join Date: Jan 2010
Location: Davie, Fl.
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Quote:
Originally Posted by Liltrekkie View Post
An 8 speed would allow the car to be in its peak torque almost all the time when tracking. There is good things, and bad things about the 8 speed.

The good? increased fuel economy keeps the RPM's low.

The bad? Weight. This does one of a few things, first. it will change the center of gravity, Second, it could potentially eliminate the ever so slight wheel weight balance. (This however might not be a bad thing)

All this for an extra two speeds that might have negligible results for this variation of car? I can see why they aren't in a hurry for it
It weighs 8 pounds less than the current 6 speed auto:

"Dubbed 8L90, the new eight-speed might have a torque converter like your dad’s Malibu, but it’s quite the beast. First, it has the highest torque capacity of any GM automatic extant, the better to handle that LT4, and second, GM claims it can upshift eight hundredths of a second quicker than Porsche’s instantaneously quick PDK dual-clutch automatic. Other bonuses include manual control, a compact design that fits it into the same space as the Stingray’s six-speed automatic, eight fewer pounds of mass than the six-speed, and the fact that it’s destined for regular Vettes next year."

Everything is correct except the last part of the last sentence.
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Last edited by OldJedi; 02-03-2014 at 08:41 PM.
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