Quote: Porsche racing engineers calculated that rotating mass is only worth 1.4 pounds for every pound of mass removed. The figure of 3, 4 or even 6 pounds per actual pound removed is an old wives tale
Even 1.4 pounds may be pushing it.
It makes perfect sense to me that removing XX amount of rotational weight should be Way better then removing xx of dead weight.
But from my testing in the 1/4 mile it pretty much came out the same as far as a performance gain.
My conclusion was that the rotational weight that has the "Time" to rotate up to speed in the distance of the whole 1/4 mile pretty much acts like dead weight, for the average cars ET. The faster the car the more the effect rotationl weight will show its advantage.
Even 1.4 pounds may be pushing it. 
