Originally Posted by tdli
most of the dynos i have seen are with 2 rollers, meaning for front wheel drive or rear wheel drive cars only. i am sure there are dynos with 4 rollers.
you can still dyno an all-wheel drive car on a 2 roller dyno though, just remove the drive shaft and now its a 2 wheel drive car.
That's what I assumed they'd have to do. I wonder if dynoing an AWD car with the drive shaft removed is as accurate as testing one with four rollers and all wheels driving. I bet a two-roller machine would be more generous, but not much. Maybe a couple ponys.