The box I was looking at is the Ultra plus. It was the only one that had a boost reference port. It had multiple timing and rpm settings, as well as what appeared to be a "launch" timing curve, and was bluetooth programmable. At the trade show it was advertised at $430, which I thought was very reasonable. I am in charge of a 5 car NHRA drag race team, and we use the MSD Grid system which also has the launch retard. I use that feature extensively to control the hit as well as overall ET. We run TopDragster class, and are not allowed to run faster than 6.10. So I use the launch retard to ramp in timing off the line.
