M2 Braking at limit on track

bmwracer12 · 12-03-2020, 07:19 PM

Hey Guys! I'm new to the forum. I recently bought a 2017 M2 and took it to the track. I have been driving an E36 on track for years as an instructor.

My question pertains to ABS and if there is any way to "raise the threshold" before ABS is activated or possibly even disable it completely.

My E36 didn't have ABS and I was able to brake at the limit without locking the tires up. When I tried similar levels of braking in the M2, ABS engaged early and I felt like I had more pressure to give before losing traction.

I did go from stock pads to performance friction 08 pads just for the event. One of the guys I talked to said that the pad change may have made the ABS module think something was wrong because the deceleration rates changed so much from the stock pads for a given pedal pressure.

Is there a way to code the ABS to a higher pedal pressure or something similar to give more room to manually manage traction?

By the way, I'm driving on track with traction control completely disabled.

Thanks in advance!

booya_45 · 12-04-2020, 08:37 AM

What tires are you running? I switched from ps4s tires to re71’s and have noticed my abs is activated LESS often during hard braking while using pagid rs29s. Maybe the brakes are overpowering less sticky tires.

booya_45 · 12-04-2020, 06:19 PM

This thread should get moved to the track subsection too. Will get more of a response there.

kpaso · 12-05-2020, 01:22 PM

Quote:

Originally Posted by booya_45

What tires are you running? I switched from ps4s tires to re71’s and have noticed my abs is activated LESS often during hard braking while using pagid rs29s. Maybe the brakes are overpowering less sticky tires.

This

bmwracer12 · 12-06-2020, 10:32 AM

Quote:

Originally Posted by booya_45

What tires are you running? I switched from ps4s tires to re71’s and have noticed my abs is activated LESS often during hard braking while using pagid rs29s. Maybe the brakes are overpowering less sticky tires.

I'm running re-71r tires.

bmwracer12 · 12-06-2020, 10:48 AM

Quote:

Originally Posted by booya_45

This thread should get moved to the track subsection too. Will get more of a response there.

Thank you. I'm not sure how to move it... do I just make a new thread with the same text or is there someway to move this over?

MTWO · 12-07-2020, 09:03 PM

You could maybe try coding the DSC module with m235iR setup and see if that helps. You could try ESYS for that or one of the coder companies that do stuff like this out there

switzerr · 12-12-2020, 07:14 AM

I am running a similar set up (same pads) but with RS-4s. My previous track car was an E46 M3, also running the same PFC pads and tires. I think the M2’s initial pedal travel is different, and I was triggering ABS earlier than in the older M car. I found some success with slightly less initial pedal application, and then increased pedal. I couldn’t “hit” the brakes as aggressively in the M2 as in the older chassis. I have no other explanation

YMMV.

12-03-2020, 07:19 PM	#1
bmwracer12 New Member 6 Rep 11 Posts Drives: BMW M2 Join Date: Nov 2020 Location: Alabama USA iTrader: (0)	M2 Braking at limit on track - ABS interfering Hey Guys! I'm new to the forum. I recently bought a 2017 M2 and took it to the track. I have been driving an E36 on track for years as an instructor. My question pertains to ABS and if there is any way to "raise the threshold" before ABS is activated or possibly even disable it completely. My E36 didn't have ABS and I was able to brake at the limit without locking the tires up. When I tried similar levels of braking in the M2, ABS engaged early and I felt like I had more pressure to give before losing traction. I did go from stock pads to performance friction 08 pads just for the event. One of the guys I talked to said that the pad change may have made the ABS module think something was wrong because the deceleration rates changed so much from the stock pads for a given pedal pressure. Is there a way to code the ABS to a higher pedal pressure or something similar to give more room to manually manage traction? By the way, I'm driving on track with traction control completely disabled. Thanks in advance!
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12-04-2020, 08:37 AM	#2
booya_45 Private First Class 87 Rep 181 Posts Drives: 2017 M2 Join Date: Feb 2018 Location: Philadelphia iTrader: (0)	What tires are you running? I switched from ps4s tires to re71’s and have noticed my abs is activated LESS often during hard braking while using pagid rs29s. Maybe the brakes are overpowering less sticky tires.
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12-04-2020, 06:19 PM	#3
booya_45 Private First Class 87 Rep 181 Posts Drives: 2017 M2 Join Date: Feb 2018 Location: Philadelphia iTrader: (0)	This thread should get moved to the track subsection too. Will get more of a response there.
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12-07-2020, 09:03 PM	#7
MTWO Captain 473 Rep 931 Posts Drives: M2 Join Date: Dec 2016 Location: Innisfil iTrader: (0)	You could maybe try coding the DSC module with m235iR setup and see if that helps. You could try ESYS for that or one of the coder companies that do stuff like this out there
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12-12-2020, 07:14 AM	#8
switzerr Private First Class 110 Rep 141 Posts Drives: 2018 M2 Join Date: Sep 2018 Location: Kingston, ON iTrader: (0)	I am running a similar set up (same pads) but with RS-4s. My previous track car was an E46 M3, also running the same PFC pads and tires. I think the M2’s initial pedal travel is different, and I was triggering ABS earlier than in the older M car. I found some success with slightly less initial pedal application, and then increased pedal. I couldn’t “hit” the brakes as aggressively in the M2 as in the older chassis. I have no other explanation YMMV.
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