Just curious, can anyone tell me what causes this on my rotors?

2011 Nismo#91 · 10-17-2016, 12:31 PM

Hi all,

I was at NJMP Thunderbolt track this weekend and noticed my discs looking like this for only the front 2 rotors. It went away later in the day and seemed to have no real effect but I am just curious as to what is was and what caused it. Pads are Carbotech XP8.

Front, looking blotchy?

Rear, shiny.

osbornsm · 10-17-2016, 01:35 PM

Same pads on rear? And what are your non-track pads?

2011 Nismo#91 · 10-17-2016, 01:52 PM

XP8 all around, I don't switch pads because I don't daily drive it and have no issues braking with them on streets.

Hotrodz · 10-17-2016, 11:12 PM

I don't know what it is but mine does that too. I figured it was a combination of heat and pad material. Like you said it goes away and it doesn't seem to have any influence on braking. I this it actual looks pretty cool lol! By the way I'm running XP10 and 8's!

2011 Nismo#91 · 10-18-2016, 08:11 AM

Quote:

Originally Posted by Hotrodz

I don't know what it is but mine does that too. I figured it was a combination of heat and pad material. Like you said it goes away and it doesn't seem to have any influence on braking. I this it actual looks pretty cool lol! By the way I'm running XP10 and 8's!

Yeah I started with XP10s all around and switched to 8's in the hope that there might be a little less metal on metal sound but nope. When these wear down I'll be going to 10 front and 8 rear.

Halfkiddio · 10-18-2016, 09:23 AM

That is the start of hot spots. Carbotech's are bad about that, especially when you daily drive them, since I had the same issue with my 10/8 combo.

The noise issue will be present with Carbotech, no matter what compound you go to, unless it's the Bobcat pads. If you want to cut that down, look into Endless ME20's. That's what I currently run. They are almost completely quiet, half as much dust compared to the XP's, and are better on the rotors so far. I might suggest going with a ME20/22 front/rear pad setup to get less bite in the rear, since you might not like what I prefer.

You can talk with John Thomas at Corner3 Motortsports for pricing.

Rusty · 10-19-2016, 07:04 PM

Pad deposit from sitting. Hot pads and rotors from tracking, then parking the car.

Spooler · 10-19-2016, 07:29 PM

I have Carbotech XP8's all around and don't get those pad deposits. I only had them when I bedded in the pads.

Hotrodz · 10-19-2016, 08:54 PM

Quote:

Originally Posted by Spooler

I have Carbotech XP8's all around and don't get those pad deposits. I only had them when I bedded in the pads.

You aint driving hard enough!

Sent from my SM-N910P using Tapatalk

Spooler · 10-19-2016, 09:55 PM

Quote:

Originally Posted by Hotrodz

You aint driving hard enough!

Sent from my SM-N910P using Tapatalk

Probably so, but I don't know what brakes are for anyway. I have a slow buggy by the way and a bad neck.

Hopefully not for long on either one.

2011 Nismo#91 · 10-20-2016, 08:54 AM

I never park and/or hold the brake during track days. Sometimes I use a wheel chock even.

10-17-2016, 12:31 PM	#1 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	Just curious, can anyone tell me what causes this on my rotors? Hi all, I was at NJMP Thunderbolt track this weekend and noticed my discs looking like this for only the front 2 rotors. It went away later in the day and seemed to have no real effect but I am just curious as to what is was and what caused it. Pads are Carbotech XP8. Front, looking blotchy? Rear, shiny. Last edited by 2011 Nismo#91; 10-17-2016 at 12:34 PM.

10-17-2016, 01:35 PM	#2 (permalink)
osbornsm A True Z Fanatic Join Date: Jun 2011 Location: WHAT Posts: 2,551 Drives: 2018 Camaro SS 1LE Rep Power: 423	Same pads on rear? And what are your non-track pads? __________________ 2018 Camaro SS 1LE (455hp) - 2011 Nissan 370z (333hp) - 2004 VW R32 (240hp) - 2000 Civic Si (160hp)

10-17-2016, 11:12 PM	#4 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	I don't know what it is but mine does that too. I figured it was a combination of heat and pad material. Like you said it goes away and it doesn't seem to have any influence on braking. I this it actual looks pretty cool lol! By the way I'm running XP10 and 8's! __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

10-18-2016, 09:23 AM	#6 (permalink)
Halfkiddio Enthusiast Member Join Date: Jan 2015 Location: Knoxville Age: 30 Posts: 250 Drives: 09 RAE 370Z Rep Power: 10	That is the start of hot spots. Carbotech's are bad about that, especially when you daily drive them, since I had the same issue with my 10/8 combo. The noise issue will be present with Carbotech, no matter what compound you go to, unless it's the Bobcat pads. If you want to cut that down, look into Endless ME20's. That's what I currently run. They are almost completely quiet, half as much dust compared to the XP's, and are better on the rotors so far. I might suggest going with a ME20/22 front/rear pad setup to get less bite in the rear, since you might not like what I prefer. You can talk with John Thomas at Corner3 Motortsports for pricing. 2011 Nismo#91, Hotrodz and Brendan like this.

10-19-2016, 07:04 PM	#7 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,862 Drives: 2011 Nismo GM 6M Rep Power: 2684436	Pad deposit from sitting. Hot pads and rotors from tracking, then parking the car. Hotrodz, Brendan and Spooler like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

10-17-2016, 01:52 PM	#3 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	XP8 all around, I don't switch pads because I don't daily drive it and have no issues braking with them on streets.

10-19-2016, 07:29 PM	#8 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,512 Drives: 2013 Nismo 370z Rep Power: 2684391	I have Carbotech XP8's all around and don't get those pad deposits. I only had them when I bedded in the pads.

10-20-2016, 08:54 AM	#11 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	I never park and/or hold the brake during track days. Sometimes I use a wheel chock even.

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