UFO problems

Bernie Benz b.m.benz at prodigy.net
Thu Jun 13 18:21:49 EDT 2002

> From: DasWolfen at aol.com
> Date: Thu, 13 Jun 2002 19:21:29 EDT

> snip<

>> Here is another technique that I've used sucessfully on a 5K and other cars
>> with badly warped rotors.  Shim them true.  If you can quantify the high
>> and
>> low points of the runout and the total runout with the dial indicator, you
>> can calculate and cut paper shims of the approperate thicknesses for 3 or 4
>> of the bolt holes, install and remeasure.  Maybe a little more work on UFOs
>> than conv rotors, but you can get them dead on if persistant.
> Ok, I have to ask........once you've accomplished the primary task of
> getting the rotor to run true how do you deal with the wheel that doesnt.
> Keith

No big deal.  If correcting a total runout of 10 thou at the rotor OD, the
shims required at the bolt circle are only 2 to 3 thou.  "True" wheels are
not that good relative to the hub.  If one wants to guild the lilly, check
the wheel in all five possible positions and choose the best.


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