[KingLT1]

Once you mod the car, the throttle will NOT open all the way at the hit of the throttle in the first couple gears. You will exceed the commanded torque by gear limit in the TCM. It gets worse as you do more mods.

Even a bone stock car will not open the throttle all the way on the launch until it rolls out. You will see a delay where the throttle is only 56-70% open for a second or two before the throttle actually opens all the way. This is a limitation in the TCM.

Most of the gains being mentioned are from the ability to launch harder. From a roll you might not see any gains depending on the setup.

This has been proven at the track with video.