on motor before we did n20 pulls with my car, the dyno was set accurately (397) and on the first n20 pull (517) as well…but when the nitrous hit, my tires were spinning on the dyno so he played with the load of the dyno for tuning purposes to dial it in on the n20…after that, the numbers were no longer accurate.
also, those two videos I posted were straight nitrous, no fuel (as my fuel solonoid wasnt working) which is why the car literally revved out in 3 seconds and it didnt seem like there was much load on the dyno.