Originally Posted by Mr. Max
It's a little slicker than that. The computer will put you in the best gear for the job, right on the better part of the torque curve or as we used to say, right on the cam. Click ZZZZZZZZZZAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIIII IIIIIIIIIIIIIIIIII
That is the technical explanation.
You asked what it does.
It slams your eyeballs to the back of your skull.
Be sure the runway in front of you is clear before doing it and never try it at home!
roadster with a stick