Yes, this can be a problem. You must strap the car such that the rear roller does not slip. A belt between the rollers solves the potential slip problem, but creates a few new problems. A single roller setup is better in almost all aspects, but there are lots of dual roller dynos out there. The video is about a dyno software upgrade, so the mechanical parts are what they are
This is a problem when the car climbs over the front roller when accelerating. The inertia of the rear roller is omitted and the result is incorrect.
Yes, this can be a problem. You must strap the car such that the rear roller does not slip. A belt between the rollers solves the potential slip problem, but creates a few new problems. A single roller setup is better in almost all aspects, but there are lots of dual roller dynos out there. The video is about a dyno software upgrade, so the mechanical parts are what they are
This is true. Bosch and stomach have both rollers on the rotation sensor and if there is a difference it indicates slippage.