Rotors to last another track day?

dcs2k · 05-06-2013, 12:34 AM

I have a track day coming up this weekend. The brembo replacement rotors I ordered may not reach me in time for the event. Will the current state of rotors hold up for one more track session? M3 running on brembo gt 380mm and semi slicks with racing pads.

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swamp2 · 05-06-2013, 12:48 AM

I can't say I have much direct experience on this but my gut tells me NO WAY. Way too many cracks, even if surface cracks. Brakes are the most important safety item on a car. Don't risk it especially on the track.

krnnerdboy · 05-06-2013, 12:51 AM

The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok.

TheKosherStogie · 05-06-2013, 01:34 AM

I don't know what's actually correct but I know people who run with worse

rcracin · 05-06-2013, 05:12 AM

I wouldn't bother. First, you may not pass tech inspection. If you do, it might crack during the first session, then the rest of your day is wasted. If you're not trailering your car, you'll have to find a way to get home.

CanAutM3 · 05-06-2013, 05:33 AM

Quote:

Originally Posted by krnnerdboy

The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok.

+1

I have run with worse without issue. The rule of thumb I use is as long as the cracks do not connect two holes together, I am good to go. The worst type of cracks are the ones that spread to the outer edge of the disk. If you see one of those, better end your day.

w00tw00t · 05-06-2013, 06:24 AM

I've also run with similar cracks on my GTR and had no problems...

Porschefile · 05-06-2013, 08:02 AM

Quote:

Originally Posted by krnnerdboy

The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok.

Same. I'd run them.

05-06-2013, 12:34 AM	#1
dcs2k Lieutenant 55 Rep 438 Posts Drives: E92 M3 Join Date: Aug 2009 Location: Singapore iTrader: (0)	Rotors to last another track day? I have a track day coming up this weekend. The brembo replacement rotors I ordered may not reach me in time for the event. Will the current state of rotors hold up for one more track session? M3 running on brembo gt 380mm and semi slicks with racing pads. ]
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05-06-2013, 12:48 AM	#2
swamp2 Lieutenant General 609 Rep 10,407 Posts Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA iTrader: (3)	I can't say I have much direct experience on this but my gut tells me NO WAY. Way too many cracks, even if surface cracks. Brakes are the most important safety item on a car. Don't risk it especially on the track. __________________ E92 M3 \| Space Gray on Fox Red \| M-DCT \| CF Roof \| RAC RG63 Wheels \| Brembo 380mm BBK \| \| Vorsteiner Ti Exhaust \| Matte Black Grilles/Side Gills/Rear Emblem/Mirrors \| \| Alekshop Back up Camera \| GP Thunders \| BMW Aluminum Pedals \| Elite Angels \| \| XPEL Full Front Wrap \| Hardwired V1 \| Interior Xenon Light Kit \|
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05-06-2013, 12:51 AM	#3
krnnerdboy Colonel 190 Rep 2,431 Posts Drives: v10 m6 Join Date: Nov 2008 Location: so cal iTrader: (10)	The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok. __________________ F80 m3, 997 gt3, 14 ram ctd, f15 x5, drz400sm Gone:z4m, boss 302, c6 z06, m6,z3m
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05-06-2013, 01:34 AM	#4
TheKosherStogie Lieutenant Colonel 342 Rep 1,805 Posts Drives: 08 M3 DCT AW/Red Join Date: May 2009 Location: West Hollywood iTrader: (1)	I don't know what's actually correct but I know people who run with worse
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05-06-2013, 05:12 AM	#5
rcracin Major 1243 Rep 1,287 Posts Drives: M3 Join Date: Jul 2012 Location: NYC iTrader: (3)	I wouldn't bother. First, you may not pass tech inspection. If you do, it might crack during the first session, then the rest of your day is wasted. If you're not trailering your car, you'll have to find a way to get home.
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05-06-2013, 06:24 AM	#7
w00tw00t Colonel 408 Rep 2,171 Posts Drives: 2016 MW M4 Join Date: Oct 2010 Location: San Jose, CA iTrader: (13)	I've also run with similar cracks on my GTR and had no problems...
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