if you track your car YOU need to do the CDV delete. if not you can leave it alone.
vid 1 had the CDV. tried to launch in the powerband. the whole time i thought i had a dying clutch. instead it was the cdv. 60ft on this pass was a 2.2. 15.1 @95mph.
vid2 was with the CDV delete. was able to launch in the powerband. 60 ft 1.9 BIG ASS DIFFERENCE. 14.3@97 mph.
If you have a 325i you can do this. full breakdown of time slip
https://www.e90post.com/forums/showthread.php?t=1514682