Does the Sport button decrease DSC intervention?

iPhoneEngineer · 07-14-2012, 11:28 PM

Hey guys -- my second day running Thunderhill Raceway in Northern CA is tomorrow, and today I struggled against a nagging DSC light severely throttling my 500HP. Since we are running the course in reverse, there are no burms or otherwise safe run-off room at the corner exits, and I'm quite hesitant to turn off DSC entirely. The supercharger makes it pretty easy to kill traction with a twitch, and some of the corners are very fast.

I was under the impression that the Sport button only changed the throttle map, but in thinking about it more (and comparing to my Porsche), it makes no sense that BMW wouldn't use that as an indication for DSC to back off some as well. Is this actually true or not? If not, I'd prefer to keep my regular throttle mapping

seank · 07-15-2012, 12:50 AM

Why don't you try and see, but I couldn't imagine there is a correlation. Ron and I can tell you after thunderhill Monday with NCRC. Hell, just stay another day, so there's 3 of us out there.

Finnegan · 07-15-2012, 02:11 AM

Sport button does not affect DSC intervention. I can't run with it on at the track (although RunnerX and others can), and it's just too abrupt for me.

See this post by The Hack. I found it very helpful, then again neither of us are running your power levels!

And yeah, stay another day! NCRC has plenty of openings for Monday's event!
Standard configuration (CCW) too.

iPhoneEngineer · 07-15-2012, 08:35 AM

Ok cool. I wish I could stay another day, but work will not tolerate it this weekend--had to leave mid day Friday for mandatory orientation.

With DSC off, what other helpers remain on? Obviously ABS, but what about CBC (Cornering Brake Control)?

Finnegan · 07-15-2012, 09:58 AM

ABS only with it off. When it's off, it's off.

Beedub · 07-15-2012, 02:56 PM

the traction on these cars suck....

my car is considerably slower than the stock z4m with the T/C on trying to drive quickly, the extra power is simply just cut to nothing.... if youve got an s/c or turbo car... dont try to race a stock z4m with this left on... you'll loose.. badly...

E82tt6 · 07-15-2012, 05:00 PM

I've never taken the Z4M to the track, but I remember how terrible the E46 M3's DSC was when I did the Skip Barber school up at Limerock. I'm not sure it even allows 1* of slip before it kicks in, kinda trigger happy for a performance car that's reasonably well balanced.

seank · 07-15-2012, 11:08 PM

E82tt6: If you don't like it, then turn it off. Cars didn't used to have any of these gadgets. What's the worse that will happen is you'll learn that 330hp is enough and you don't need a supercharger..

E82tt6 · 07-16-2012, 03:50 AM

Quote:

Originally Posted by seank

E82tt6: If you don't like it, then turn it off. Cars didn't used to have any of these gadgets. What's the worse that will happen is you'll learn that 330hp is enough and you don't need a supercharger..

I don't disagree. I've actually found that stability control can sometimes actually impede car control in certain circumstances, especially snow. If you properly correct in the event of oversteer with DSC engaged, it will often overcompensate and end up kicking the rear out in the opposite direction.

I was simply commenting on the fact that the DSC isn't programmed with high performance driving in mind.

iPhoneEngineer · 07-17-2012, 12:51 AM

Best thing I did for the track weekend was work up the courage to turn off DSC. Don't regret it at all even though a very tricky corner lead me to spin one lap!

07-14-2012, 11:28 PM	#1
iPhoneEngineer Lieutenant Drives: 2007 BMW Z4 M Coupe Join Date: Jun 2010 Location: La Honda, CA Posts: 467 iTrader: (2)	Does the Sport button decrease DSC intervention? Hey guys -- my second day running Thunderhill Raceway in Northern CA is tomorrow, and today I struggled against a nagging DSC light severely throttling my 500HP. Since we are running the course in reverse, there are no burms or otherwise safe run-off room at the corner exits, and I'm quite hesitant to turn off DSC entirely. The supercharger makes it pretty easy to kill traction with a twitch, and some of the corners are very fast. I was under the impression that the Sport button only changed the throttle map, but in thinking about it more (and comparing to my Porsche), it makes no sense that BMW wouldn't use that as an indication for DSC to back off some as well. Is this actually true or not? If not, I'd prefer to keep my regular throttle mapping
	Tweet

07-15-2012, 02:11 AM	#3
Finnegan Major General Drives: Sapphire Black/Black Z4Mc Join Date: Oct 2008 Location: At the track..or wishing I were at the track Posts: 5,477 iTrader: (17)	Sport button does not affect DSC intervention. I can't run with it on at the track (although RunnerX and others can), and it's just too abrupt for me. See this post by The Hack. I found it very helpful, then again neither of us are running your power levels! And yeah, stay another day! NCRC has plenty of openings for Monday's event! Standard configuration (CCW) too. __________________ 2007 Sapphire Black Z4M / Apex EC7s / Eisenmann Exhaust / Euro Headers/Cat / Aero Sideskirts / DIY Stubby / Ultimate Pedals / AS SSK / RB Rotors / Other Stuff #1047

07-15-2012, 09:58 AM	#5
Finnegan Major General Drives: Sapphire Black/Black Z4Mc Join Date: Oct 2008 Location: At the track..or wishing I were at the track Posts: 5,477 iTrader: (17)	ABS only with it off. When it's off, it's off. __________________ 2007 Sapphire Black Z4M / Apex EC7s / Eisenmann Exhaust / Euro Headers/Cat / Aero Sideskirts / DIY Stubby / Ultimate Pedals / AS SSK / RB Rotors / Other Stuff #1047

07-15-2012, 02:56 PM	#6
Beedub Brigadier General Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK Posts: 3,057 iTrader: (0)	the traction on these cars suck.... my car is considerably slower than the stock z4m with the T/C on trying to drive quickly, the extra power is simply just cut to nothing.... if youve got an s/c or turbo car... dont try to race a stock z4m with this left on... you'll loose.. badly... __________________ Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.

07-15-2012, 05:00 PM	#7
E82tt6 Colonel Drives: '08 Black Saphire Z4 MC Join Date: Oct 2007 Location: New Jersey Posts: 2,627 iTrader: (0)	I've never taken the Z4M to the track, but I remember how terrible the E46 M3's DSC was when I did the Skip Barber school up at Limerock. I'm not sure it even allows 1* of slip before it kicks in, kinda trigger happy for a performance car that's reasonably well balanced. __________________ '08 Black Saphire/Black Z4 M Coupe RIP Gretta: Blue Water/Lemon 135i. Died to save me. -ChuckV

07-15-2012, 12:50 AM	#2
seank enthusiast Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011 Location: sacramento, ca Posts: 679 iTrader: (2)	Why don't you try and see, but I couldn't imagine there is a correlation. Ron and I can tell you after thunderhill Monday with NCRC. Hell, just stay another day, so there's 3 of us out there.

07-15-2012, 08:35 AM	#4
iPhoneEngineer Lieutenant Drives: 2007 BMW Z4 M Coupe Join Date: Jun 2010 Location: La Honda, CA Posts: 467 iTrader: (2)	Ok cool. I wish I could stay another day, but work will not tolerate it this weekend--had to leave mid day Friday for mandatory orientation. With DSC off, what other helpers remain on? Obviously ABS, but what about CBC (Cornering Brake Control)?

07-15-2012, 11:08 PM	#8
seank enthusiast Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011 Location: sacramento, ca Posts: 679 iTrader: (2)	E82tt6: If you don't like it, then turn it off. Cars didn't used to have any of these gadgets. What's the worse that will happen is you'll learn that 330hp is enough and you don't need a supercharger..

07-17-2012, 12:51 AM	#10
iPhoneEngineer Lieutenant Drives: 2007 BMW Z4 M Coupe Join Date: Jun 2010 Location: La Honda, CA Posts: 467 iTrader: (2)	Best thing I did for the track weekend was work up the courage to turn off DSC. Don't regret it at all even though a very tricky corner lead me to spin one lap!

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