Track brakes hot...reduce power

Ryan13 · 07-17-2016, 09:51 AM

Out at Summit Point this weekend tweaking the setup on my 128. It's not gruesomely hot, but warm enough we are tracking in shorts (no flip-flops).

Towards the end of each session, I'm getting a reduction in power, comes and goes on different parts of the track. DTC completely off. I'm thinking it is something in the coding where the brakes are hitting a temperature threshold and reducing engine power. No flickering dash lights noticed. Calipers are standard, pads are upgraded to coolstops, LSD in rear. I'm not lifting that I know of, so not sure how much e-diff is working.

Any other thoughts on potential other cause? Can the temp setting be coded out? I'm getting ready to put 335 calipers/rotors front and rear as soon as I use these up, but not sure if that helps.

AlexR6 · 07-17-2016, 11:17 AM

When I overheat my brakes due to elsd intervention I do not get any power reduction and I get the brake yellow dash light on.

I would say your problem is engine oil temp... especially if you do not have the oil cooler!

kprocivic · 07-17-2016, 02:59 PM

http://www.e90post.com/forums/showthread.php?t=1117725

dcaron9999 · 10-13-2016, 10:19 AM

This nanny can be coded off by INPA. The parameter is called:

" Engine Power Reduction to Prevent Brake Disc Overheating (FLR) "

http://www.onelapx1.com/blog/how-to-...w-actually-fun

07-17-2016, 09:51 AM	#1
Ryan13 Private First Class 73 Rep 128 Posts Drives: Z4MC, Z4MR, M3, E36, M2, 535 Join Date: Jul 2014 Location: Leesburg, VA iTrader: (0)	Track brakes hot...reduce power Out at Summit Point this weekend tweaking the setup on my 128. It's not gruesomely hot, but warm enough we are tracking in shorts (no flip-flops). Towards the end of each session, I'm getting a reduction in power, comes and goes on different parts of the track. DTC completely off. I'm thinking it is something in the coding where the brakes are hitting a temperature threshold and reducing engine power. No flickering dash lights noticed. Calipers are standard, pads are upgraded to coolstops, LSD in rear. I'm not lifting that I know of, so not sure how much e-diff is working. Any other thoughts on potential other cause? Can the temp setting be coded out? I'm getting ready to put 335 calipers/rotors front and rear as soon as I use these up, but not sure if that helps.
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07-17-2016, 11:17 AM	#2
AlexR6 Private 20 Rep 79 Posts Drives: BMW E82 125i Join Date: Jul 2015 Location: Italy iTrader: (0)	When I overheat my brakes due to elsd intervention I do not get any power reduction and I get the brake yellow dash light on. I would say your problem is engine oil temp... especially if you do not have the oil cooler!
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07-17-2016, 02:59 PM	#3
kprocivic Lieutenant Colonel 813 Rep 1,575 Posts Drives: ecoboost s to the t Join Date: Apr 2014 Location: 92346 iTrader: (7)	http://www.e90post.com/forums/showthread.php?t=1117725
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10-13-2016, 10:19 AM	#4
dcaron9999 Major 157 Rep 1,409 Posts Drives: 2011 135i M package Join Date: Jan 2010 Location: Mirabel, Quebec iTrader: (0)	This nanny can be coded off by INPA. The parameter is called: " Engine Power Reduction to Prevent Brake Disc Overheating (FLR) " http://www.onelapx1.com/blog/how-to-...w-actually-fun __________________ 2011 X3 35i with M pack + 2011 135i w/6SPMT \| 255 square tire setup \| Quaife 3.46 LSD \| Diff lock down bracket \| Bilstein B8+Swift SpecR springs+H&R FSB \| CDV delete \| BMS Oil Tstat bypass \| ER FMIC & CP \| N54Tuning DP \| GC Street Camber Plates \| M3 FCA +guide rods+RSFB's+Tranny mounts \| Manzo toe arms \| Cobb Stg2 agressive tune \| Hawk DTC70 brake pads \| RB SS brake pistons \| Goodridge SS brake lines \| Custom brake cooling ducts
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