Got to say there are a lot of variables here on getting an accurate run! Seems all a bit hit and miss to me, not doubting you have a powerful car with those mods it will be rapid and very powerful.
However the gearbox is an unchanged variable, why would a stage 1 car have any more or less losses than a stage 2 car. The parts are the same and they are doing the same job, so losses should be comparable. You can allow a few hp either way for run variances and tolerances of the gearbox parts from one car to another but there wouldn't be 20hp difference.
Slipping and jumping cars means were adding a further variable that ultimately effects the result. Maybe they need to apply more braking load to the rollers if the car is of a high power output just seems an inefficient method of measuring power output to me if they are fighting the car and struggling to keep it strapped down.
However the gearbox is an unchanged variable, why would a stage 1 car have any more or less losses than a stage 2 car. The parts are the same and they are doing the same job, so losses should be comparable. You can allow a few hp either way for run variances and tolerances of the gearbox parts from one car to another but there wouldn't be 20hp difference.
Slipping and jumping cars means were adding a further variable that ultimately effects the result. Maybe they need to apply more braking load to the rollers if the car is of a high power output just seems an inefficient method of measuring power output to me if they are fighting the car and struggling to keep it strapped down.