Larger Rear Brake Rotors?

Discussion in 'Brakes, Wheels and Tires' started by VoodooBoss, Dec 1, 2013.

  1. dmichaels

    dmichaels Papa Smurf

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    I put the rear ST43 pads in last August, and I have not taken them out since. About 2000 street miles and 9 track days so far I think. 6 or so of those track days the rear calipers were sticking too. I've used less than 1/2 of the pad and not much rotor wear. I'm highly impressed with them

    For the fronts, I only have 1 track day on the ST47's but saw no noticeable wear on pads or rotors.

    Over the next 2 weeks I have 3 more track days planned so I'll have a better feel for the front pads after that
     
  2. dmichaels

    dmichaels Papa Smurf

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    He is getting tooling to cut the right pad shape for the rears. Porterfield sells them at the moment but not for an amazing price or anything. Agree they are tough to source.

    Fronts are easy though
     
  3. dmichaels

    dmichaels Papa Smurf

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    Nothing beyond what I am used to with track pads. I have not put in OEM pads to see if they are quiet. I'll see over the next weeks though if it is trending worse. All 4 brakes squeal at the moment since I generall keep track pads in all the time though
     
  4. VoodooBoss

    VoodooBoss Rick Moderator

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    I'm getting this really bad with my Stoptech 13.8" rotors and new brackets. So bad that I thought something was wrong with my car. I've isolated this to my rear brakes and not sure what to do about it. Mine is not consistent and at least I'm not alone. ;) Are you using the Ford rear caliper brackets?

    Is the theory that rotors that large and thin vibrate or something along those lines?
     
  5. VoodooBoss

    VoodooBoss Rick Moderator

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    I'm surprised by this. Are you turning off the traction control? My rears are wearing well and the Pagid RS56 rear pads last longer than the RS29 fronts.
     
  6. JScheier

    JScheier Too Hot for the Boss!

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    I'm running OEM GT500 parts ( brackets and rotors). The noise is mainly on street pads and doesn't appear to have anything to do with the amount of heat in the pads or calipers (based on testing). I can drag the brakes and get them nice and hot, still have the squeal. Hit them bone cold, still have the squeal. Yet, other times, not a peep out of them. Very difficult to isolate the problem.

    Ford hasn't really said anything about it based on what I've read on the other forums, and the GT500 users seem to be hit-or-miss with the issue. I've loaded the back of the pads with anti-squeal and even that didn't seem to help.
     
  7. VoodooBoss

    VoodooBoss Rick Moderator

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    Mine only moan in reverse and it can be quite loud.
     
  8. JScheier

    JScheier Too Hot for the Boss!

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    Mine squeal in forward motion. Usually when I'm stuck in traffic.... way louder than expected :)
     
  9. TMSBOSS

    TMSBOSS TMO Addict

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    Rick

    I was surprised also.

    1000 street miles and 3 track days. I failed to shut off the TC for two runs at the track day recently. Smoked the rears. Wore out the pads and work the rotors through the slots.

    Ordered a second set of pads and rotor rings.

    If this set has same results, I will switch brands.

    Very possibly an operator head space issue. God forbid. LOL. ;D
     
  10. cobrarob

    cobrarob 11 Shelby GT500

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    Got the R29s for the rear,little more endurance
     
  11. cobrarob

    cobrarob 11 Shelby GT500

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    [​IMG]
    [​IMG]

    Put on Cales brackets and new rotors from Nick...(and matching fronts)
    waitin on the R29s from Pete.
    Thanks guys looks sweet!
     
  12. Tri-bar

    Tri-bar TMO Race

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    Mine make noise also, but only with the HP+'s until they wear in good and flat with the rotor. Then it's not so bad. Stock style 2013 GT500 rear brake setup.
     
  13. Wingrider

    Wingrider '11 GT500, 99% Track Car. Lots of mods & I coach

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    Humm… My brake noises seem to have gone away after my back to back track days. All quiet right now.
     
  14. dmichaels

    dmichaels Papa Smurf

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    First track day today with the new GT500 rotors on the rear. Worked great! Strong braking, no bias issues, and had zero fade at Limerock. I'm going to bleed them this weekend to make sure no bubbles, but the pedal feel was excellent through 25 minute sessions in 85F ambient temps.

    So far, I am very very happy!!! I'll check out the brackets as well, but they seemed to hold up just fine
     
  15. VoodooBoss

    VoodooBoss Rick Moderator

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    Did you hear any moaning from the rotors especially in reverse?
     
  16. dmichaels

    dmichaels Papa Smurf

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    Not a peep. And zero sticking rear rotor either. Which is a first for me. They always stick after a track day in the past. I'll drive it on the street a couple days next week and let you know if I still have no noise. Also back at the track next Thursday for more testing.
     
  17. Cruiserfx

    Cruiserfx TMO Intermediate

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    Just discovered this thread. Perfect timing as I just rebuilt my rear calipers and noticed I needed new rotors. Brackets are on sale over at ebay right now @ 114.00. http://www.ebay.com/itm/162101928898?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Went with the less expensive centric high carbon rotors. Stop tech slotted will be going on when I wear out the fronts.

    This forum has an inverse affect; the more I read the less money I have!!
     
  18. k98dave

    k98dave TMO Addict

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    Yes & no. I found this thread which saved me the work and $ of having to pull axles ti install GT500 brackets just to use bigger rotors so I'm still ahead.
     
  19. VoodooBoss

    VoodooBoss Rick Moderator

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    You're not the first TMO member to notice this. ;D
     
  20. k98dave

    k98dave TMO Addict

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    Seem like many fall into what I call "Technical Bling" Where mainly street cars or light duty track day car owners send lots of $$ to equip cars with items from reading about what a full on race duty car has or needs. ??? May give you peace of mind, but that's about it. Spend you mod money wisely not just because it looks race car cool! ;D
     

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