Exactly. You have to set the light at an rpm to start and then test. You can’t anticipate the light like you can watch the tach needle. So there is a big delay from the time the light comes on until the driver throws the lever. There is then a delay from when the lever is thrown and the transmission actually shifts.
There are far too many variables to say if you want to shift at 7000 you set the light at 6800 or some other number.
I know guys who have their lights come on 700 rpm before they want to shift.
