UFO brake question
ekellock at gmail.com
Wed Apr 30 14:50:39 PDT 2008
I second all of this from Kneale. I have two cars with UFOs and have
had little problem with shimmy. I make sure that if I have to come to
an abrupt stop from any speed, I initially stop back a bit and then
move forward little by little w/o the brakes applied if possible.
I've even taught this to a woman (*gasp*, mea culpa, apologies, etc.
it's joke! tough crowd) who drives one of them most often. When a
"tune up" is necessary, it is imperative to be able to drive around
for several minutes, like 10 or more if possible, w/o any brake usage
to let them cool evenly.
PS What wheels do have? Lots of openness for cooling? Brake cooling
ducts in place?
On 4/30/08, Kneale Brownson <knealeski at sbcglobal.net> wrote:
> What do you do after the rotors are "smoking hot"? Do you continue to drive so the brakes cool down and then park without applying the brakes for any length of time?
> I've found that when I get the steering wheel shake (two V8s, 200q20v), if I go out and get 'em hot and then drive with minimal brake use so they cool down, the shake goes away. I also avoid sitting in traffic with the brakes applied, especially after hard use. I stop with extra space in front so I can roll forward slightly every few seconds and move pad location on the rotors.
> db cornett <dbcornett at yahoo.com> wrote:
> Don't get me wrong.... I like the performance of the UFO brakes on my '91 2C20v. Especially with the Porterfield R4-S pads I use on the street.
> The problem is the steering wheel shakes when the brakes are applied. Warped rotors is my guess too. I've gone through 4 sets (2 used, 1 reconditioned, 1 new OEM) of UFO rotors in the last 3 years. 2 years ago I replaced all the suspension bushings and strut mounts with OEM. I also replaced the rack rod ends at that time. I was using Pagid Reds then. In an attempt to sort this out I went to the R4-S pads when I installed a new set of OEM rotors last year. I bedded in the pads as per Porterfield recommendations. I've triple checked all fastener torques, made sure the rotors were mounted to rust free, clean mating surfaces on the hubs. The calipers are free to slide on their mounts and the caliper pistons are rust free and stroke just fine. The front end alignment was checked last month and is in spec. I am using H&R springs with Bilstein HD's. Oh yeah, I've got 197k miles on the clock... it starts quickly and pulls hard to 7000erpm (MTM chip & waste gate
> spring). I don't baby the brakes. I get them smoking HOT every once in awhile trying to sort this out.
> So with all that explanation.... does any one have first hand experience solving this problem with the UFO's? Other than installing a BIRA system or someone elses version of the same.
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