[Shotimes] Front Rotor Warping

[Jim and Debbie Leyden]

I bought the OEM pads from FPS at the same time I put the first set of
rotors on.  I drove the car carefully (using the brakes only lightly) for
the first week.  Then I went out and performed the breakin procedure that is
outlined on that website.  I even went to the extreme of printing out the
instructions and taking them in the car with me while I did the breakin.  At
no time did (or do)I EVER sit in traffic with hot brakes and keep the brakes
applied hard. (if the car will sit at a light in neutral without rolling
that is what I do.  If it won't, I will let it slowly creep with the brakes
barely applied so the pads can't burn to the rotor)  I have inspected the
rotors visually and I can see no evidence of friction material transfer on
the rotors.

Like I said...  we have been extremly careful with this set of rotors to not
mess them up.

Another thing that is bothering me is the act of having the rotors turned by
a service center.  Being a former machine tool builder I understand all
facets of manufacturing processes and I firmly believe that the act of
turning a rotor is destructive to the friction surface.  I would like to get
them Blanchard ground using the hubs mating surface for the baseline but I
have no clue as to where I could find a machine shop around the Atlanta area
that could tackle this.

Jim
'93 MTX



-----Original Message-----
From: Paul Nimz [mailto:pmnimz@V8SHO.com]
Sent: Saturday, April 19, 2003 3:47 PM
To: Jim and Debbie Leyden; Shotimes@Autox.Team.Net
Subject: Re: [Shotimes] Front Rotor Warping


What kind of pads do you use?  Do you seat the pads after a 100 miles? Read
this for a controversial opinion.
http://www.stoptech.com/whitepapers/warped_rotors_myth.htm  FWIW on my '97
with the OEM rotors and 90k they didn't warp.  And now with AZ rotors still
no problem.  I have only used the OEM pads and am very pleased with them.

Paul Nimz
'97 TR SHO
'93 EG mtx SHO


----- Original Message -----
From: "Jim and Debbie Leyden" <jndleyden@mindspring.com>
To: "Shotimes@Autox.Team.Net" <shotimes@autox.team.net>
Sent: Saturday, April 19, 2003 1:08 PM
Subject: [Shotimes] Front Rotor Warping


> A little over a year ago I upgraded my brakes to the 11.6 front rotors.
> When I did the conversion I used new pads, rotors, brackets, slider pins,
> calipers and backing plates.  The knuckles were purchased from a boneyard.
> About six months ago the car started to vibrate when braking.  I checked
the
> front rotors and found that there were casting porosities in them.  I
talked
> to the place where I purchased them and they agreed to credit me the cost
> towards a set of PowerSlot rotors.  Well, now six months later I again
have
> a nasty vibration from the front end when braking.  My wife and I have
been
> VERY careful with these brakes so as to not overheat them. (I DO drive
> rather hard but I use engine braking as well as brakes)  I talked to the
> shop where I purchased them and was told that the same situation had
arisen
> with the owners car (powerslots also) and he merely had to take them out
and
> REALLY heat them up to correct the problem.  I tried this, it seemed to
work
> for a little while (couple weeks they were fine) but now the shaking is
back
> and even worse then before.
>
> Any clues as to why I can't keep a set of rotors from warping?
>
> Jim
> '93 MTX
> perfect for that commercial where the guy is shaking his chocolate milk.
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