Member, P400 Sport, DSC On (>550)
Join Date: Oct 2006
Location: Menomonee Falls, WI
Thanked 3 Times in 3 Posts
Rev-matched down shifts/SMG thoughts
Rev matching when downshifting, on the brakes or not, is an art and many of us do it routinely and well. The SMG ability to do that "automagically" is certainly cool, but not amazing, and in my experience at M School, was extremely consistent, although not (at least on "my" car) completely accurate, being about 200 or so rpm short as the clutch engages and completes the match. A good manual driver can do way better, but not perhaps as consistently.
One thing I noted yesterday on a balmy little top down drive in my S2000 (January? Wisconsin? You're joking, 007), a car for which a 6 speed manual is as "natural" (it comes no other way) as some members here think the SMG is natural for the M5, is that when braking hard into a corner, I typically choose my gear just at the turn in, and it may be going from 5th to 2nd at that point with no time in the intervening gears. SMG of course would require three shifts, however brief a time spent in the intervening gears, easy enough with flicks of the finger, but "different" than we manual types would typically do it. Yeah, I know some people work up and down through all the gears, but from a pracitcal standpoint it is usually unnecessary in either direction and just wears things out faster. And downshifting through the gears can't add any deceleration to what the brakes are doing because they already usually take the tires to the limits of adhesion.
Last edited by erikmoeser; 5th January 2007 at 08:57 PM.