Rear brake cooling

photonforces · 03-30-2023, 08:09 PM

Hello! I went to the track and noticed that my rear rotors are getting just as hot as the front ones. After each cool-down lap, I checked all of the rotors with a temperature gun and they were usually around 450-550F. After one of my runs, I didn't get a cool-down lap because they flagged us in, and all 4 rotors were around 750F.

I was originally planning on getting a cooling kit for the front from Z1, but now I think I need something for the rear as well. I couldn't find any posts about rear brake cooling, only the front. Is it normal for the rear brakes to get as hot as the front? If not, what should I do about it? Are there any good rear brake cooling setups out there?

I am running Carbotech XP10 front, XP8 rear, and Motul RBF 600 brake fluid on a 2014 Nismo. Any advice on this matter would be greatly appreciated.

Averying · 03-30-2023, 09:17 PM

Quote:

Originally Posted by photonforces

Hello! I went to the track and noticed that my rear rotors are getting just as hot as the front ones. After each cool-down lap, I checked all of the rotors with a temperature gun and they were usually around 450-550F. After one of my runs, I didn't get a cool-down lap because they flagged us in, and all 4 rotors were around 750F.

I was originally planning on getting a cooling kit for the front from Z1, but now I think I need something for the rear as well. I couldn't find any posts about rear brake cooling, only the front. Is it normal for the rear brakes to get as hot as the front? If not, what should I do about it? Are there any good rear brake cooling setups out there?

I am running Carbotech XP10 front, XP8 rear, and Motul RBF 600 brake fluid on a 2014 Nismo. Any advice on this matter would be greatly appreciated.

Sounds like you might need to go XP12 XP8 when you get the front brake cooling ducts. Thatd shift some brake bias forward to where you’ll be pulling the heat from.

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cv129 · 03-31-2023, 08:04 AM

What rotors are you running?

Spooler · 03-31-2023, 09:12 AM

Are you running with traction control and the stabiltiy control on? If so, it will heat the rear brakes up. Turn it off.

Averying · 03-31-2023, 10:20 AM

Quote:

Originally Posted by Spooler

Are you running with traction control and the stabiltiy control on? If so, it will heat the rear brakes up. Turn it off.

Good point. I’ve heard that having TC on eats thru rear pads faster so this could definitely be the cause

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Spooler · 03-31-2023, 10:49 AM

Quote:

Originally Posted by Averying

Good point. I’ve heard that having TC on eats thru rear pads faster so this could definitely be the cause

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I hate the factory traction control. It is terrible.

photonforces · 04-01-2023, 11:11 AM

Quote:

Originally Posted by Averying

Sounds like you might need to go XP12 XP8 when you get the front brake cooling ducts. Thatd shift some brake bias forward to where you’ll be pulling the heat from.

Thanks, I will have to try out the XP12 on my next set.

Quote:

Originally Posted by cv129

What rotors are you running?

Stock rotors. I do plan to upgrade to something better, just not the 2-piece, they are too pricey IMO.

Quote:

Originally Posted by Spooler

Are you running with traction control and the stabiltiy control on? If so, it will heat the rear brakes up. Turn it off.

I had traction control off the whole time, using the button on the left, but I did not disconnect the yaw sensor so stability control was on.
I don't think I was getting sideways enough for that to kick on, but I'm also not sure how sensitive it is. I'm also a bit concerned about doing that.

DarkJak · 04-02-2023, 09:10 PM

Yaw cut off made a huge difference for me on rear temps as well as predictability at/slightly over the limits.

After turning that off, I got 100-200F lower rear temps on the rears. Definitely advise it!

photonforces · 04-03-2023, 08:15 PM

Thanks DarkJak,
That settles it, I'm installing a switch for that yaw line.

Spooler · 04-03-2023, 08:56 PM

Quote:

Originally Posted by photonforces

Thanks DarkJak,
That settles it, I'm installing a switch for that yaw line.

I have been procrastinating myself. I have my switch installed, I just need to hook it up.

fairladyATX · 04-09-2023, 08:51 PM

Quote:

Originally Posted by Spooler

I have been procrastinating myself. I have my switch installed, I just need to hook it up.

If you figure out how to wire it up, please share. I've had a switch installed for a year, but can't figure out how to get it to work.

Averying · 04-09-2023, 09:18 PM

Quote:

Originally Posted by fairladyATX

If you figure out how to wire it up, please share. I've had a switch installed for a year, but can't figure out how to get it to work.

Seems like a super simple DIY. Did u follow this thread?

DIY Yaw Sensor rocker switch

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Spooler · 04-09-2023, 09:44 PM

Quote:

Originally Posted by fairladyATX

If you figure out how to wire it up, please share. I've had a switch installed for a year, but can't figure out how to get it to work.

I will soon. My car has been back in the shop since last year around Oct. When I get it back I will wire it up.

photonforces · 01-27-2024, 04:06 PM

Update:
I installed front brake cooling and a stability control / yaw sensor disable switch. The front and back brakes are now about 100-150 F cooler. The car feels safe and predictable with the stability control off.
Thanks for the help!

03-30-2023, 08:09 PM	#1 (permalink)
photonforces Base Member Join Date: Feb 2021 Location: Orlando Posts: 5 Drives: 2014 370z Nismo Rep Power: 4	Rear brake cooling Hello! I went to the track and noticed that my rear rotors are getting just as hot as the front ones. After each cool-down lap, I checked all of the rotors with a temperature gun and they were usually around 450-550F. After one of my runs, I didn't get a cool-down lap because they flagged us in, and all 4 rotors were around 750F. I was originally planning on getting a cooling kit for the front from Z1, but now I think I need something for the rear as well. I couldn't find any posts about rear brake cooling, only the front. Is it normal for the rear brakes to get as hot as the front? If not, what should I do about it? Are there any good rear brake cooling setups out there? I am running Carbotech XP10 front, XP8 rear, and Motul RBF 600 brake fluid on a 2014 Nismo. Any advice on this matter would be greatly appreciated.

03-31-2023, 08:04 AM	#3 (permalink)
cv129 A True Z Fanatic Join Date: Jul 2011 Location: Dallas, TX Posts: 3,192 Drives: 09 Nismo, 16 Nismo Rep Power: 159827	What rotors are you running? __________________ Setrab \| RE-71 \| SPL \| JRZ \| Nismo \| ARK \| Whiteline \| RacingBrake \| CJM Oil Pan \| Ti shield

03-31-2023, 09:12 AM	#4 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,512 Drives: 2013 Nismo 370z Rep Power: 2684391	Are you running with traction control and the stabiltiy control on? If so, it will heat the rear brakes up. Turn it off. cv129 and Rusty like this.

04-02-2023, 09:10 PM	#8 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,390 Drives: 2009 370Z Rep Power: 13448	Yaw cut off made a huge difference for me on rear temps as well as predictability at/slightly over the limits. After turning that off, I got 100-200F lower rear temps on the rears. Definitely advise it! cv129, Rusty and sx moneypit like this. __________________ @stupidtoycars \| My track vids 09 7AT\|MCS 2WNR\|Topgunz Rotrex\|Ecutek (Eugene)\|Maxxis RC1\|Titan-7 TS-5\|OSG LSD\|Rear Mount Derale Oil Cooler (WIP)+25 Trans Cooler\|Fismo\|G-LOC R12/R10\|Zeta III L\|NLR Wing and Splitter\|CJM Pan and Fuel Hat\|Radium Surge Tank\|AP Racing CP9668

01-27-2024, 04:06 PM	#14 (permalink)
photonforces Base Member Join Date: Feb 2021 Location: Orlando Posts: 5 Drives: 2014 370z Nismo Rep Power: 4	Update: I installed front brake cooling and a stability control / yaw sensor disable switch. The front and back brakes are now about 100-150 F cooler. The car feels safe and predictable with the stability control off. Thanks for the help! Rusty likes this.

04-03-2023, 08:15 PM	#9 (permalink)
photonforces Base Member Join Date: Feb 2021 Location: Orlando Posts: 5 Drives: 2014 370z Nismo Rep Power: 4	Thanks DarkJak, That settles it, I'm installing a switch for that yaw line.

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