Speedometer Error Correction

WolfGTI · 05-10-2018, 08:57 PM

Can this be changed through coding - thinking of changing tire size and want to eliminate the error.

aerobod · 05-11-2018, 10:43 AM

On my M240i, the speedometer is 4% over reading with standard 245/35-18 rear tyres (629mm nominal diameter) and 1% under with 225/45-18 (660mm nominal diameter) rear tyres. You may find that changing your tyre size makes the speedometer more accurate. Speed was checked using GPS while the car is on cruise control at 100km/h on a level surface in each case.

pikcachu · 05-14-2018, 08:50 PM

Quote:

Originally Posted by WolfGTI

Can this be changed through coding - thinking of changing tire size and want to eliminate the error.

KOMBI 3000 BC_V_KORREKTUR aktiv nicht_aktiv BC calculation with the speedometer curve - correction for analog / Head up display speed - disabling those corrections , you will be able to see the real speed.

WolfGTI · 05-17-2018, 08:39 PM

Thank you - however the speedometer will still read inaccurately correct?

Quote:

Originally Posted by pikcachu

KOMBI 3000 BC_V_KORREKTUR aktiv nicht_aktiv BC calculation with the speedometer curve - correction for analog / Head up display speed - disabling those corrections , you will be able to see the real speed.

pikcachu · 05-17-2018, 11:19 PM

Quote:

Originally Posted by WolfGTI

Thank you - however the speedometer will still read inaccurately correct?

never actually tried it so not quite sure

05-10-2018, 08:57 PM	#1
WolfGTI Captain 716 Rep 913 Posts Drives: '17 F22,15 E84 M Sport,02 R53 Join Date: Jul 2007 Location: South NJ iTrader: (0) Garage List 2017 BMW M240i [0.00] 2002 MINI Cooper S [0.00] 2015 BMW X1 [0.00]	Speedometer Error Correction Can this be changed through coding - thinking of changing tire size and want to eliminate the error.
	Appreciate 0 Tweet Quote

05-11-2018, 10:43 AM	#2
aerobod Car Geek 3626 Rep 3,594 Posts Drives: Caterham R500, M2-G87, Macan S Join Date: Mar 2008 Location: Calgary iTrader: (0)	On my M240i, the speedometer is 4% over reading with standard 245/35-18 rear tyres (629mm nominal diameter) and 1% under with 225/45-18 (660mm nominal diameter) rear tyres. You may find that changing your tyre size makes the speedometer more accurate. Speed was checked using GPS while the car is on cruise control at 100km/h on a level surface in each case.
	Appreciate 0 Quote