Quote:
Originally Posted by Mike Benvo
...but theoretically not having the wheels and tires mounted to the hubs could signify less loss.
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This should be true simply as a matter of physics. Measuring at the hub eliminates the losses from (1) tire deformation and hysteresis, which I can imagine is considerable when multiplied by the radius of the tire/wheel combination, in other words the torque impact of the losses at the point of tire contact on a normal dyno, and (2) tire and wheel mass that consume power (rotational energy or torque) in order to be rotated.
In essence this dyno is equal to a conventional one with perfect tire adhesion, no tire deformation, and tires and wheels of zero mass.