If you have a K&R Pro Cube delay box with the timers you can use that. I use a Digital Delay timer. It's very versatile it will start the time sequence two different ways. You can set it so that when the engine passes a preset rpm it will start the timer. you can use this function if you foot brake. When we footbrake race I set the timer to start at 5500 rpm. We stall the engine to 3000 rpm, when I stand on it when the engine goes past 5500 rpm the timer starts. 1.65 seconds later it shifts 1-2 3.95 seconds later it shifts 2-3.
When we're box racing I set it so the timer starts when the transbrake releases. It's a pretty cool system.
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