Re: wheel drag (low Audi content)

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Mon, 2 Dec 1996, Michael Benno wrote:

> Wheel drag is a real bummer
> 
> I wonder how much energy is lost just fighting the friction of the brakes
> rubbing on the rotors. Also, how much rub is too much and is it worth
> trying to fix.

It is my understanding that the runout in the rotor is used to push the 
pads back from the rotor so that there is no drag between the pads and 
the rotor.  Even a couple tenths of a thousandth of an inch can be 
enough.  I think that bearing friction is worse by a long shot.  I have 
looked at a few different wheel bearing configurations, and some are 
notably lower in friction.  Corvettes, for example, are quite easy to 
push by hand, due in part to their low friction wheel bearings.

Later, ---------------------------------------------------------- 
Graydon D. Stuckey 	'85 Mazda RX7 GS, no toys 
graydon@apollo.gmi.edu 	'86 Audi 5000 CS Turbo Quattro, has toys
Flint, Michigan USA	'89 Thunderbird SC, lotsa toys