New 275 tire world record!

The boys actually came by today. The bump box hasn't a thing to do with spooling the turbo up. It's all about being more accurate getting the car staged. It works with the transbrake, as someone mentioned earlier. Theirs is infinitely adjustable and can be "bumped" as many times as necessary...although they have narrowed it down pretty good. Also, it is so sensitive that even after the transmission breaks in, the box needs readjusting.