Tuning ET with msd grid

[n5ifi]

Originally Posted by Maverick

I would ask NHRA, if it is a all electronics class, and allow timers, and throttle controls, and your going to ban me for having a idiot lite come on. I am getting old, so if I am banned for having a lite come on, then so be it. The racers are tough, and if you think I am going to look at the light going 140, when the other guys is going 170, you have no idea. Steve Williams S/G 351N, small block Ford probe with a clutch and a five speed.

What is the light used for?
Does it trigger anything else?