Forward brake bias?

stonecliff · 10-12-2014, 08:34 PM

Spent the day on the track today at NJMP-Lightning. Fun day in the car.

Has anyone else noticed a forward bias to the brakes? I'll check again tomorrow, but I felt that it really chewed up the front R4 pads I used (the rear R4 pads seemed to fare better). And some BMW engineers were there checking out certain cars as they came off track and measured my rotors at 440 degrees C front and 150 degrees C rear. Seems like a pretty big discrepancy.

Hopefully they'll be there again tomorrow and I'll ask them the question also. But wondering if anyone here has any insight.

FTS · 10-12-2014, 10:43 PM

This is no surprise I think. Front heavy vehicle, and under heavy braking as much as 65-70% of the weight would shift onto the front axle. Almost all cars are the same though, except 911s.

10-12-2014, 08:34 PM	#1
stonecliff Private First Class 23 Rep 115 Posts Drives: 2015 M4 6MT Join Date: Jan 2014 Location: New Jersey iTrader: (0) Garage List 2016 Volvo XC90 R [0.00] 2015 BMW M4 [0.00]	Spent the day on the track today at NJMP-Lightning. Fun day in the car. Has anyone else noticed a forward bias to the brakes? I'll check again tomorrow, but I felt that it really chewed up the front R4 pads I used (the rear R4 pads seemed to fare better). And some BMW engineers were there checking out certain cars as they came off track and measured my rotors at 440 degrees C front and 150 degrees C rear. Seems like a pretty big discrepancy. Hopefully they'll be there again tomorrow and I'll ask them the question also. But wondering if anyone here has any insight. Last edited by stonecliff; 10-15-2014 at 05:40 PM..
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10-12-2014, 10:43 PM	#2
FTS Enjoying driving 388 Rep 1,169 Posts Drives: 645 Join Date: May 2009 Location: MD iTrader: (0)	This is no surprise I think. Front heavy vehicle, and under heavy braking as much as 65-70% of the weight would shift onto the front axle. Almost all cars are the same though, except 911s.
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