Quote:
Originally Posted by HerrK
Basically it alluded to the problem with not being able to hold a gear even in the manual mode thus not being in the proper gear for the next corner/segment of the track. Also some inconsistent up and down shifts in the the auto mode. Of course this is all on the track with experienced drivers. The Z4 35is DCT times were off about 4 sec from the 1M with a manual and basically the same engine (OK so it does have a locking diff, M3 brakes and suspension). Sorry all you DCT lovers!
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The Z4 was 3 seconds faster than the 335is. What transmission did it have?
The only reason the DCT would not hold a gear is if you were bouncing off the redline. The only reason that would be necessary is if certain corners were in-between gears (too high for second, too low for 3rd). I don't recall that problem with a 550i at VIR. It had the 6sp auto with paddles. Although I didn't run the Grand West course to include the inner section. I only used 2nd gear for Oak Tree (bottom U turn on the pic).
PS: Most car clubs dis-allow the Z4 at VIR so I can't give you my real opinion or experience of its DCT on track. But on a REAL twisty road such as the Tail of the Dragon, you can't beat the DCT. I DARE anyone this side of Auberlen to shift a 6MT as many times on the 318 curves as you can with the DCT and paddles.
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2020 X3M non-comp, Alpine White over black : Exec Pkg, ventilated M Sport seats, 20"s
2020 M2 Comp, Sunset Orange/Blk: Orange stitching, DCT, exec pkg, bicolor rims
Gone '18 M550i, '16 X4 M40i, '15 M5, '13 X3 35i, '12 335is, '11 X5 50i, '09 Z4 35i, '08 550i, 06 X3, 06 650i, '02 M5, '99 540i