[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: Brake calipers
In a message dated 96-04-07 12:12:56 EDT, you write:
>
>On Sat, 6 Apr 1996, treilley wrote:
>
>> Do single piston type calipers cause more warpage than dual(1 piston
>> on each side)? A mechanic told me they did because they exert more
>> force on one side of the rotor than the other. Sounds to me like
this
>
>> guy has been talking to too many "old wives".
>
>Warpage isnt a function of how much force is applied to the rotor, its a
>function of heat. If you can get the heat away, by either rotor design or
>wheel design, cooling, ducting etc then you wont have problems. If you
>exert more force on the rotor, it does equate to more heat which needs to
>be removed however, but they do not warp BECAUSE of the twin pot clamps..
>
>Bob
>
Don't know if I agree with this and I'll have to toss in my $.02. I had a
1986 5000T. The front brakes were the dual-piston type. The vibration during
braking was absolutely horrible. In the course of trying to cure the problem
I managed to: cut the rotors, replace the rotors (twice), replace the brake
pads, replace some suspension busings, etc. Almost all the work was
performed by the dealer - some under warranty and all paid by someone else
since it was a company car. Each "fix" would make the car well for two weeks
but within 500 miles the vibration was back. Eventually I dumped the car,
never thoroughly solving the problem. I now have a 1989 200TQW which has the
single piston type. These things are beautiful. Never a shimmy - stops
great. Pads cost a small fortune (>$100), last only 18 months but work
great.
So the question is do you really have warpage or do you just have a shimmy
and THINK that it is caused by warpage?
Mark