Brake Rotor wear and slight scoring HPDE

Rangerz · 06-22-2014, 05:02 PM

I did some searching and their seems to be some debate on resurfacing rotors. I have run 6 track days this year on the OEM rotors and EBC yellow stuff pads. The pads have 3/8 to a 1/4 " of material still left and will need to be upgraded after my next event 6/29. Both my front rotors are showing slight groves on the contact area so not sure if I should bother resurfacing them or continue to run them. Both discs are 1.26" thick = 32mm.

I posted this here because I think the track guys will have encountered this more often than anyone else.

The grooves are smooth edged and probably .005-.015 in depth. That,s a swag measurement I don't have needle tipped micrometer for getting down in the groove.

So what would you do? I planned on the Z1 2 piece rotors but, wanted to get through the year on the stockers.

Here is a pic of the front passenger side disc hopefully you can see enough detail.

cossie1600 · 06-22-2014, 06:09 PM

Looks fine to me, have seen much worse

andy_meng1024 · 06-22-2014, 08:36 PM

I had 3 track days with OEM rotors and DS2500 then the rotors started to shake when hard braking. I switched to Carbotech XP24 front and XP20 rear pads then resurfacing is now unnecessary. My tech said the compound of these pads are so hard they grind the rotors smooth, lol. I have Z1 rotors waiting whenever these OEMs are done.

Rusty · 06-22-2014, 08:45 PM

My Yellowstuffs did the samething on my RacingBrake rotors. No problem with it.

thompsontechs · 06-22-2014, 08:53 PM

Looks perfect... no worries mate!

Rangerz · 06-22-2014, 09:01 PM

Thanks for the feed back guys.

Rangerz · 06-22-2014, 10:09 PM

Quote:

Originally Posted by Rusty

My Yellowstuffs did the samething on my RacingBrake rotors. No problem with it.

Racing Break rotors are $$$$ looked at the 2 pc ones on the web site.

synolimit · 06-23-2014, 01:13 AM

Quote:

Originally Posted by andy_meng1024

I had 3 track days with OEM rotors and DS2500 then the rotors started to shake when hard braking. I switched to Carbotech XP24 front and XP20 rear pads then resurfacing is now unnecessary. My tech said the compound of these pads are so hard they grind the rotors smooth, lol. I have Z1 rotors waiting whenever these OEMs are done.

Dear lord!

BuckeyeZ · 06-24-2014, 11:49 AM

I don't think you need to resurface. My YellowStuffs did the same thing. I don't think this is a brake pad issue....it's just the nature of using a more aggressive pad.

You need to 'bed' the pads in. The rotors will quickly cut a matching groove in the pad. I have no issues with mine and I swap back-and-forth between EBC for track and my OEM pads for street driving and bed each time without issue.

ENT-Z · 06-24-2014, 09:52 PM

Quote:

Originally Posted by synolimit

Dear lord!

Agreed!! I didn't even know they made them in that aggressive of a number. I run XP10 front and XP8 rear and they are plenty aggressive for high performance street tires. Even on full slicks I don't think you would need to run that aggressive of a pad??

06-22-2014, 05:02 PM	#1 (permalink)
Rangerz Enthusiast Member Join Date: Jun 2013 Location: Northern Utah Age: 58 Posts: 476 Drives: 2012 370 Nismo Rep Power: 11	Brake Rotor wear and slight scoring HPDE I did some searching and their seems to be some debate on resurfacing rotors. I have run 6 track days this year on the OEM rotors and EBC yellow stuff pads. The pads have 3/8 to a 1/4 " of material still left and will need to be upgraded after my next event 6/29. Both my front rotors are showing slight groves on the contact area so not sure if I should bother resurfacing them or continue to run them. Both discs are 1.26" thick = 32mm. I posted this here because I think the track guys will have encountered this more often than anyone else. The grooves are smooth edged and probably .005-.015 in depth. That,s a swag measurement I don't have needle tipped micrometer for getting down in the groove. So what would you do? I planned on the Z1 2 piece rotors but, wanted to get through the year on the stockers. Here is a pic of the front passenger side disc hopefully you can see enough detail. __________________ Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

06-22-2014, 06:09 PM	#2 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	Looks fine to me, have seen much worse Rangerz likes this.

06-22-2014, 08:36 PM	#3 (permalink)
andy_meng1024 Premium Member Join Date: Nov 2009 Location: Taipei Posts: 233 Drives: 2012 370z Rep Power: 3381	I had 3 track days with OEM rotors and DS2500 then the rotors started to shake when hard braking. I switched to Carbotech XP24 front and XP20 rear pads then resurfacing is now unnecessary. My tech said the compound of these pads are so hard they grind the rotors smooth, lol. I have Z1 rotors waiting whenever these OEMs are done. Mike and Rangerz like this. __________________ Current: 2015 C200 / 2018 Cayenne / 2012 370z / 2012 C250 Coupe Gone: 2013 Cayenne / 2004 Cayenne S / 2003 SL55 AMG / 2008 C300 / 2006 350z / 2006 C280 4Matic

06-22-2014, 08:45 PM	#4 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,867 Drives: 2011 Nismo GM 6M Rep Power: 2684436	My Yellowstuffs did the samething on my RacingBrake rotors. No problem with it. Rangerz likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

06-22-2014, 08:53 PM	#5 (permalink)
thompsontechs Base Member Join Date: Apr 2014 Location: Rockford Posts: 129 Drives: 370 Sport Rep Power: 11	Looks perfect... no worries mate! Rangerz likes this.

06-22-2014, 09:01 PM	#6 (permalink)
Rangerz Enthusiast Member Join Date: Jun 2013 Location: Northern Utah Age: 58 Posts: 476 Drives: 2012 370 Nismo Rep Power: 11	Thanks for the feed back guys. __________________ Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

06-24-2014, 11:49 AM	#9 (permalink)
BuckeyeZ Enthusiast Member Join Date: Dec 2010 Location: Music City Posts: 291 Drives: 370Z BMW M4 Rep Power: 65	I don't think you need to resurface. My YellowStuffs did the same thing. I don't think this is a brake pad issue....it's just the nature of using a more aggressive pad. You need to 'bed' the pads in. The rotors will quickly cut a matching groove in the pad. I have no issues with mine and I swap back-and-forth between EBC for track and my OEM pads for street driving and bed each time without issue. Rangerz and thompsontechs like this. __________________ Stillen \| EVO-R \| HPS \| K&N \| Hotchkis \| Modshack Oil Cooler \| SPL

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