brake calipers? (FEB update w/ STOPTECHS!)

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t500hps
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brake calipers? (FEB update w/ STOPTECHS!)

Postby t500hps » Mon Dec 15, 2014 5:38 pm

Longevity?

I bought a competitive 4.6l mustang to start CMC in 2012 and am running well. Using the cobra/pbr calipers and Carbotech pads I'm stopping with the leaders but pads and white box rotors only last one full weekend. For those that have used PBRs and switched, what are you using now and how much longer are the pads/rotors lasting? Any advice for a relative rookie?
Last edited by t500hps on Wed Feb 11, 2015 11:59 am, edited 1 time in total.

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BADVENM
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Postby BADVENM » Mon Dec 15, 2014 6:53 pm

On my Fox Mustang I'm using Duralast rotors (part #54087) with the Cobra calipers. I was using Carbotech pads until about 3 years ago, now using Hawk and LOVE them! My pads can usually last a full season, maybe a tad less.

As far as the rotors, I'm now getting at least a full season out of them, I remember a few years ago going through 2 sets a season.

One thing we do now is after a race, warmup, qual, etc (when the car is in the pits) is push the car about 5 feet or so every 5 or 10 minutes, that way the car isn't sitting in one spot for a long time right after a session. All that heat gets dissipated a bit more evenly and not focused on one spot on the rotors. I think that's helped with the rotors longevity. Issues we had were with the fronts.
NASA Rocky Mountain - Camaro-Mustang Challenge car #8 Team Incidental Contact
3rd Place CMC - 2010 NASA National Championship
3rd Place CMC - 2015 NASA West Coast Championship PTB

t500hps
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Postby t500hps » Mon Dec 15, 2014 7:37 pm

BADVENM wrote:On my Fox Mustang I'm using Duralast rotors (part #54087) with the Cobra calipers. I was using Carbotech pads until about 3 years ago, now using Hawk and LOVE them! My pads can usually last a full season, maybe a tad less.

As far as the rotors, I'm now getting at least a full season out of them, I remember a few years ago going through 2 sets a season.

One thing we do now is after a race, warmup, qual, etc (when the car is in the pits) is push the car about 5 feet or so every 5 or 10 minutes, that way the car isn't sitting in one spot for a long time right after a session. All that heat gets dissipated a bit more evenly and not focused on one spot on the rotors. I think that's helped with the rotors longevity. Issues we had were with the fronts.


You get them from Autozone.......that's the EXACT rotor I'm using with the same caliper. I too roll the car after quickly checking tire pressure and getting out of the fire suit. I'm surprised your pads last that long......although I do a lot of Friday practices too. Several of my competitors are using Hawks and I typically out brake them, even braking/outbraking with those running Wilwoods and Brembos at times (no stoptechs around here).

Which Hawks are you running? 60s, 70s?

blk96gt
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Re: brake calipers?

Postby blk96gt » Mon Dec 15, 2014 7:53 pm

t500hps wrote:Longevity?

I bought a competitive 4.6l mustang to start CMC in 2012 and am running well. Using the cobra/pbr calipers and Carbotech pads I'm stopping with the leaders but pads and white box rotors only last one full weekend. For those that have used PBRs and switched, what are you using now and how much longer are the pads/rotors lasting? Any advice for a relative rookie?


I was having the same issue with the Cobra setup until I swapped to the StopTech setup. I was using the Duralast rotors as well. I tried various compounds (Hawk 60/70, Carbotech, PFC01/11), and ended up settling on the PFC01. I know others have used the Raybestos pads (can't remember which compound) with good success. No matter what pads I used I would get at most 3 weekends out of pads/rotors. Average was probably 2.

I've got three or four weekends on the Stoptechs now, and the pads and rotors barely look used. I'm pretty sure Mosty has had the same rotors for ~3-4 years, and goes through around one set of pads per season. It looks like my pad life will be about the same too.

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BADVENM
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Postby BADVENM » Mon Dec 15, 2014 8:30 pm

I too can usually out brake quite a few cars, especially the heavier GM's. They'll get me on the long straightaways but come time to hit the brakes hard I can usually catch up to them by braking later.

One thing that came to mind is brake bias setting, if you have one. That may help in longer pad/rotor life. Just a thought.
NASA Rocky Mountain - Camaro-Mustang Challenge car #8 Team Incidental Contact
3rd Place CMC - 2010 NASA National Championship
3rd Place CMC - 2015 NASA West Coast Championship PTB

t500hps
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Postby t500hps » Tue Dec 16, 2014 12:28 pm

No brake bias on the car but I always do a "victory lap" around the paddock to help with rotor cooling before parking the car. It seems I'm going to start looking for change in sofas trying to collect $2,400 for Stoptechs!

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TX#11CMC
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Postby TX#11CMC » Tue Dec 16, 2014 5:05 pm

IMO, the Stoptechs are the way to go!!!
I would go through 2 sets of rotors / year and 3 sets of PFC01 pads / year when running the PBR setup. It was a major pain to always be checking pads and bleeding the calipers. It also sucked when coming off track and chatting in the pits after the race and you hear a loud PING, to a cracked rotor you now have to hurry up and replace so you don't miss the next session.

I have run the Stoptechs for 4 years now. I do feel they give a performance advantage in modulation but the main benefit is much less maintenance and fewer consumables.
I ran my first set of rotors for 2 1/2 years and then decided to buy a new set of rings. The first set is still perfectly good, I just figured why not keep them as a backup set. The newer set has 1 1/2 years on them and they still look great.
I also went from getting about 2 weekends on a set of pads to about 5 weekends. The pads cost more for the Stoptechs but last over twice as long.

With the PBR's I would bleed my brakes after every event, and sometimes after each day (if it was a heavy braking track). Now I only bleed them before an event at a heavy braking track, and I have never had a hint of boiling fluid with the Stoptechs.

If you have the means, I highly recommend picking a set up. They are so choice!! :wink:
-Michael Mosty
TX region #11
"Fox" driver and lovin it!!!
Texas Region - CMC Director

suck fumes
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Postby suck fumes » Tue Dec 16, 2014 5:24 pm

The two piece rotors are the biggest contributor to longer pad life. Plus the stoptechs are not $2400 everywhere. Tire rack can order the kit for you for less. I paid $1700 for mine.
2013 CMC NATIONAL CHAMPION

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t500hps
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Postby t500hps » Tue Dec 16, 2014 7:26 pm

suck fumes wrote:The two piece rotors are the biggest contributor to longer pad life. Plus the stoptechs are not $2400 everywhere. Tire rack can order the kit for you for less. I paid $1700 for mine.


That's a big enough difference that I'D buy. Remember the part number by any chance?

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roadracerwhite
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Postby roadracerwhite » Wed Dec 17, 2014 5:31 am

Michael, what pads are you running?
Bryan White
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TX#11CMC
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Postby TX#11CMC » Wed Dec 17, 2014 10:23 am

PFC01's which have now been changed to PFC11's.
-Michael Mosty
TX region #11
"Fox" driver and lovin it!!!
Texas Region - CMC Director

blk96gt
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Postby blk96gt » Wed Dec 17, 2014 11:27 am

t500hps wrote:
suck fumes wrote:The two piece rotors are the biggest contributor to longer pad life. Plus the stoptechs are not $2400 everywhere. Tire rack can order the kit for you for less. I paid $1700 for mine.


That's a big enough difference that I'D buy. Remember the part number by any chance?

87-328-4600-50

I'm using the PFC11's as well.

t500hps
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Postby t500hps » Fri Dec 19, 2014 5:50 pm

Contacted a vendor that comes to our track and found out he could get the last set of "clearanced" ST40 stoptech calipers in a "CMC" kit. The guys at KNS Brakes spent a ton of time finding these things for me and answering a lot of stupid questions I threw at them!

Trublu
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Postby Trublu » Sat Dec 20, 2014 3:38 pm

Girodisc sell a 2 piece floating rotor as a direct replacement for a stock mustang rotor. If you call them they will set you up with a plain set, on the web they only list slotted. Good people who are interested in supporting grass roots racers.
Craig McCormick
#65 Fox Stang
Waller, Tx

ShadowBolt
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Postby ShadowBolt » Sun Dec 21, 2014 3:25 pm

Trublu wrote:Girodisc sell a 2 piece floating rotor as a direct replacement for a stock mustang rotor. If you call them they will set you up with a plain set, on the web they only list slotted. Good people who are interested in supporting grass roots racers.


Todd at TCE performance also will sell you a set of Aluminum hats then direct you to Coleman for the rings.

JJ


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