Speed Limiter ?

devondragon · 08-23-2016, 04:22 AM

I have a '14 M6 CP. I've done a Turner axle-back race exhaust/muffler delete, and a Turner piggie-back chip.

AFAIK the car has a speed limiter at 155, and while I've been up in that territory a fair bit, I never pushed that number to see what would happen.

Let's assume that someone who isn't me, for the sake of argument, found himself coming to work before 5 AM and found the roads completely empty, and kept the pedal down a bit longer than normal on a certain straightaway. Let's assume that same fellow was quite surprised when the digital speedometer happily ran right up past 155, and in fact made it all the way to 166 before the upcoming road conditions made braking prudent.

Now I could see the speed limiter kicking in at say 156 instead of 155, but I was quite surprised that the car pulled happily to 166, and seemed like it would keep going if only the road permitted.

Thoughts? Am I crazy?

IM6 · 08-23-2016, 05:15 AM

ive hit 180 and my palms were getting sweaty. its a scary. however good the brakes on the car are, mine are CB, the stability of this car at high speed is not secure. too much body roll I had.

devondragon · 08-23-2016, 05:17 AM

Do you have the CP suspension? My car feels rock solid at these speeds but I have the CP suspension (and keep it set to Sport)

hjs1971 · 08-23-2016, 09:57 AM

"My friend" has seen the same numbers on his '12 non-CP with no mods.

devondragon · 08-23-2016, 09:58 AM

So what's the story with the 155 MPH limiter? Does it not exist? Is it some higher number "my friend" hasn't hit yet?

M5 London · 08-23-2016, 04:40 PM

The stock limiter always used to allow 166/167 mph speedo indicated for me.

devondragon · 08-23-2016, 04:51 PM

Huh intersting! Thanks!

tab · 08-28-2016, 02:36 PM

Hmmmm, mine stopped me at 156. Pulled strongly into the peg, then stopped.

melvyn · 08-28-2016, 10:01 PM

Quote:

Originally Posted by devondragon

Do you have the CP suspension? My car feels rock solid at these speeds but I have the CP suspension (and keep it set to Sport)

Opened mine up on a derestricted short straight in fourth gear to see what it would pull to redline, it hit 146 and surprised me how stable it was .I can understand how they are autobahn killers.

M6-Coupe · 08-29-2016, 06:52 PM

Your speed limiter has a built-in error by law to intentionally show the vehicle speed more than the actual one. this will prevent any miscalculation if you use the slightly bigger size tire with more circumference (ie 305/30/20 instead of 295/30/20)... don't be surprise to see 16x mph on speedo which is normal. Always rely on GPS only
The actual speed limiter is 155 mph and there is another speed limiter on transmission which is 186 mph for M driver's package which is not available in US

M5 London · 08-30-2016, 09:16 AM

Quote:

Originally Posted by IM6

ive hit 180 and my palms were getting sweaty. its a scary. however good the brakes on the car are, mine are CB, the stability of this car at high speed is not secure. too much body roll I had.

I would get your car checked out thoroughly.

I couldn't totally disagree with your statement any more !

kris1858 · 09-13-2016, 09:06 PM

Quote:

Originally Posted by M5 London

The stock limiter always used to allow 166/167 mph speedo indicated for me.

I maxed out around 169/170mph on the heads up display before acceleration diminished... Seemed like the car could go faster?

speedracerlo · 09-13-2016, 09:53 PM

hey it's illegal to travel at those speeds

, you must keep under the speed limit at all times
I'm reporting to the popos

M5 London · 09-15-2016, 07:46 AM

Quote:

Originally Posted by kris1858

I maxed out around 169/170mph on the heads up display before acceleration diminished... Seemed like the car could go faster?

Yeah sure can go faster !

:

08-23-2016, 04:22 AM	#1
devondragon Lieutenant 153 Rep 427 Posts Drives: 2019 M5 Competition Join Date: Oct 2011 Location: Boulder, CO iTrader: (0) Garage List 2014 BMW M6 Coupe [8.50]	Speed Limiter ? I have a '14 M6 CP. I've done a Turner axle-back race exhaust/muffler delete, and a Turner piggie-back chip. AFAIK the car has a speed limiter at 155, and while I've been up in that territory a fair bit, I never pushed that number to see what would happen. Let's assume that someone who isn't me, for the sake of argument, found himself coming to work before 5 AM and found the roads completely empty, and kept the pedal down a bit longer than normal on a certain straightaway. Let's assume that same fellow was quite surprised when the digital speedometer happily ran right up past 155, and in fact made it all the way to 166 before the upcoming road conditions made braking prudent. Now I could see the speed limiter kicking in at say 156 instead of 155, but I was quite surprised that the car pulled happily to 166, and seemed like it would keep going if only the road permitted. Thoughts? Am I crazy?
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08-23-2016, 05:15 AM	#2
IM6 Private First Class 30 Rep 156 Posts Drives: BMW M6 F13 Join Date: May 2016 Location: LONDON iTrader: (0)	ive hit 180 and my palms were getting sweaty. its a scary. however good the brakes on the car are, mine are CB, the stability of this car at high speed is not secure. too much body roll I had.
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08-23-2016, 05:17 AM	#3
devondragon Lieutenant 153 Rep 427 Posts Drives: 2019 M5 Competition Join Date: Oct 2011 Location: Boulder, CO iTrader: (0) Garage List 2014 BMW M6 Coupe [8.50]	Do you have the CP suspension? My car feels rock solid at these speeds but I have the CP suspension (and keep it set to Sport)
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08-23-2016, 09:57 AM	#4
hjs1971 Private First Class 4 Rep 149 Posts Drives: 2017 x5m, 2012 m6 convertible Join Date: May 2008 Location: Tampa, FL iTrader: (1)	"My friend" has seen the same numbers on his '12 non-CP with no mods. __________________ 2013 Alpine White X5 3.5xdrive Daily driver. 2012 San Marino Blue Metallic M6 convertible with silver stone interior. No mods. Weekend cruiser.
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08-23-2016, 09:58 AM	#5
devondragon Lieutenant 153 Rep 427 Posts Drives: 2019 M5 Competition Join Date: Oct 2011 Location: Boulder, CO iTrader: (0) Garage List 2014 BMW M6 Coupe [8.50]	So what's the story with the 155 MPH limiter? Does it not exist? Is it some higher number "my friend" hasn't hit yet?
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08-23-2016, 04:40 PM	#6
M5 London Second Lieutenant 330 Rep 231 Posts Drives: F90 M5 LCI - Aventurine Red Join Date: Oct 2014 Location: South Kensington, London iTrader: (0)	The stock limiter always used to allow 166/167 mph speedo indicated for me. __________________ F90 M5 LCI - Aventurine Red/Smoked White-E39 M5 - Modified ESS Supercharger Kit -E34 M5 1995 - Arctic Silver / Black Leather- E30 M3 1987 - Diamond Black Metallic / Black Leather-996 Turbo - Lapis Blue/Savannah-VW Rallye Golf
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08-23-2016, 04:51 PM	#7
devondragon Lieutenant 153 Rep 427 Posts Drives: 2019 M5 Competition Join Date: Oct 2011 Location: Boulder, CO iTrader: (0) Garage List 2014 BMW M6 Coupe [8.50]	Huh intersting! Thanks!
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08-28-2016, 02:36 PM	#8
tab Second Lieutenant 64 Rep 232 Posts Drives: 2016 M6 Gran Coupe MT Join Date: Mar 2015 Location: Chicago iTrader: (0) Garage List 2016 BMW M6 GC [10.00]	Hmmmm, mine stopped me at 156. Pulled strongly into the peg, then stopped.
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08-29-2016, 06:52 PM	#10
M6-Coupe Major General 1125 Rep 6,066 Posts Drives: F92 M8 Join Date: Feb 2014 Location: Bay area iTrader: (0)	Your speed limiter has a built-in error by law to intentionally show the vehicle speed more than the actual one. this will prevent any miscalculation if you use the slightly bigger size tire with more circumference (ie 305/30/20 instead of 295/30/20)... don't be surprise to see 16x mph on speedo which is normal. Always rely on GPS only The actual speed limiter is 155 mph and there is another speed limiter on transmission which is 186 mph for M driver's package which is not available in US __________________ Current : 2020 F92 Black Sapphire M8 - ZF8 Gone : 2018 F80 Mineral Gray M3 - 6MT Gone : 2016 F82 Austin Yellow M4 - 6MT Gone : 2013 F13 Sakhir Orange M6 -7DCT Gone: 2013 F13 Alpine White 650i -ZF8
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09-13-2016, 09:53 PM	#13
speedracerlo Captain 305 Rep 676 Posts Drives: 2015 M6 Gran Coupe Join Date: Oct 2011 Location: Downtown Los Angeles iTrader: (1) Garage List 2018 Porsche 971 Pa ... [0.00] 2015 BMW M6 Gran Coupe [10.00]	hey it's illegal to travel at those speeds , you must keep under the speed limit at all times I'm reporting to the popos
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