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05-04-2019, 08:46 AM
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#1 |
    Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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Caliper failure ruined track day
 Driver front caliper hanging up. Found this out coming hot into the tightest turn at NJMP Lightning course. Hit braking point as I normally do and tire went up in smoke. Obviously made my appex all wrong. Came into pits and pulled off to find brake dragging. I manually backed off pads then pumped brakes to have it still drag. Tested passenger side to see if they acted the same but they released. Has anyone else had issues? Racing Brakes has upgraded rebuild kit, pricey though |
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05-04-2019, 11:30 AM
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#2 |
      
Drives: 2020 SS 1LE (previous: 2017 SS 1LE) Join Date: Mar 2012
Location: Canada, eh!
Posts: 5,091
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This is an OEM caliper with DBA discs and OEM hat and what size pads?
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05-04-2019, 11:38 AM
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#3 |
Drives: SW 1SS 1LE / Jeep XJ Join Date: Mar 2016
Location: WPB,FL
Posts: 799
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Need more info
What pads? How thick where your pads before the track day? Did the Piston come out? |
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05-04-2019, 12:40 PM
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#4 |
 
Drives: 2018 Hyper Blue 2SS 1LE Join Date: Aug 2018
Location: Dessert
Posts: 486
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Did you ever let the caliper hang by the hose? Or did the hose get twisted or pinched at some point? On another vehicle I've had the hose come apart inside and cause a flap of rubber to block the fluid flow when releasing pressure on the brakes.
__________________
2018 Hyper Blue Metallic 2SS 1LE with Nav, PDR, and track alignment
1:34.20 Willow Springs Big Track |
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05-04-2019, 06:45 PM
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#5 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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New DBA new DTC70 Castrol fluid.
So the ruined event was actually the second event on them. The first day was 2 weeks prior and ambient temps were 46. My initial thought they didnt see enough temps but they must have as I went 1.26 at Thunderbolt which isnt any record by any means but not a turd either. Yes when I did installation I had mechanics wire supporting caliper. One thing I did notice is after I had tires rebalanced the car was pulling to the left. I calked that up to rubber built up on tire..or at least that is w hff at I was hoping |
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05-04-2019, 06:51 PM
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#6 |
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Drives: 2020 SS 1LE (previous: 2017 SS 1LE) Join Date: Mar 2012
Location: Canada, eh!
Posts: 5,091
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Oem hats? I suspect dtc70s run quite a bit on a hot side? Maybe something got fried? Sorry no concrete clues from me. Hope you'll solve it quickly after finding a root cause. Brake issues are a real bummer - obviously!
All the best! |
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05-04-2019, 06:51 PM
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#7 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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Yes OEM hat
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05-04-2019, 06:53 PM
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#8 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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Yes dust seals look like fried pig skins at local truck stop
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05-04-2019, 06:54 PM
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#9 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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05-04-2019, 07:04 PM
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#10 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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Does brembo make their "racing series calipers " t.f hst will still keep stock rotors? I'd imagine no as offset is probably different.
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05-04-2019, 08:10 PM
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#11 | |
Drives: 2016 2SS BLK A8 Vert Join Date: Dec 2017
Location: MA
Posts: 1,029
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Quote:
 If you end up using this RB kit Lmk how it holds up for ya!!!
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NPP, MRC, Tinted side & rear reflectors, OEM ZL1 Rockers / 3rd Brake / Darken tail lights, OEM Blk rear splash guards, Satin hood wrap, Fuse pull, Sound tube delete, Cat delete, Ported 95 TB, Ported MSD IM, Dry RotoFab, ARH 1 7/8 headers, E85, "Performance Dyno" Tune, BMR "pieces", "Track" alignment, Hawk DCT-70/70's w/SRF, Goodridge lines, Ti shims, Red powdered calipers, 18" APEX SM-10's w/ Pirelli DH's, FE4 Vert swaybars, Brake cooling ducts, ATI 10% UD, Vorshlag camber plates, OEM 1LE Splitter w/APR Ext., Velossa BIG MOUTH Ram Air, CF QA1, ZLE brakes(F)
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05-04-2019, 08:29 PM
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#12 | |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,470
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Quote:
I think better choice would be "real" Brembos or AP as those zl1 are super heavy. |
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05-04-2019, 10:35 PM
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#13 |
Drives: 1LEs Join Date: May 2009
Location: DFW - Texas
Posts: 1,319
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The J57 front calipers (same caliper as the J6H ZL1) uses vented pistons but with the same dust seals. So, the vented calipers do a lot to keep the heat off the dust seals.
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05-04-2019, 11:18 PM
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#14 | |
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Drives: 2020 SS 1LE (previous: 2017 SS 1LE) Join Date: Mar 2012
Location: Canada, eh!
Posts: 5,091
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Quote:
 Bottom line high torque pads bring on the heat and even the best calipers need regular rebuilds. Ran Essex AP kit (very nice but very pricey) on my Vette and they needed work every 2 seasons. So dont expect miracles should you decide to empty your wallet PS my stockers look like brand new but then again i run stock Ferodos... |
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