Without a delay box, all you have to do is time yourself with your brain to cut a light. That is what all the no-box and footbrake racers have to do. A slow car can't be made to react quicker by the driver because that would require seeing the light before it came on.

Or you could mechanically setup your car to react 0.500 (like all the no-box cars do), and when you race Super Pro, put the box back in with the appropriate delay (ie if you put .110 in now, put .010 in with the car setup for .500 instead of .400. The box is adjusting the final/total reaction time you see on the timeslip. Rollout is geometry, not time.

The bottom line is you can do it, it is just harder without a delay box. And that is the delay box advantage, difficulty not "possible or not"

I agree this is a fun class, and I hope everybody realizes that. My points are intended to get more cars to enter by giving them a chance to cut the same light as the next racer. And more bracket cars can cut 0.500 than 0.400.