12-02-2012, 10:44 PM | #1 |
Captain
65
Rep 602
Posts |
speedo off anyone?
anyone else think their speedometer is off? mine seems to be about 5mph higher than the actual speed I'm going according to GPS. any way to check and adjust this?
__________________
e92 m3 6MT, RS4 6MT, S4 Avant 6MT, WRX 5MT, Corsica
|
12-02-2012, 10:58 PM | #2 | |
Knight Commander
559
Rep 5,948
Posts
Drives: 2014 911 Turbo S
Join Date: Aug 2010
Location: Buckhead
iTrader: (0)
Garage List 2014 Porsche 911 Tu ... [10.00]
2015 Mercedes-Benz ... [0.00] 2015 Jaguar F Type R [0.00] 2014 BMW M5 [0.00] |
Quote:
You can change the setting to actual speed via coding.
__________________
2022 Mercedes-Benz EQS 580
2020 Mercedes-Benz GLE 450 Ordered: EQS580, BMW IX, Lucid Air Touring, Corvette Stingray |
|
Appreciate
0
|
12-02-2012, 11:10 PM | #3 | ||
Captain
65
Rep 602
Posts |
Quote:
__________________
e92 m3 6MT, RS4 6MT, S4 Avant 6MT, WRX 5MT, Corsica
|
||
Appreciate
0
|
12-03-2012, 01:43 PM | #5 |
Lieutenant Colonel
126
Rep 1,781
Posts |
European cars tend to exaggerate speed slightly. Up until the moment you learned that, you thought you were an undefeated speed demon.
Tire pressures and rim size have a negligible effect on speedo readout. The engineers build this cushion in so that even if there are variables out of your control, there's no way you can sue the company for an inaccurate speedometer. Make sure when swapping for winter that you buy rims and tires with a total rolling radius equal to factory spec. |
Appreciate
0
|
12-03-2012, 01:48 PM | #6 |
Brigadier General
594
Rep 4,488
Posts |
Yes, speedos read slightly high because it's illegal for them to read even 1% slow. Switching to a different tire size would definitely affect your readings, but not enough to be important at highway speeds. That really only comes into play if you're on the track gathering telemetry and really want to know your exact speeds, but in that case you'd be getting speeds from GPS anyway. I don't know whether BMW calibrates the speedometer differently depending on whether you ordered 19" or 20", but if not I suspect they calibrate for 20" because in that case switching to 19s means you'll be going slower than the speedo says.
__________________
'16 Cayman GT4 (delivery pics, comparison to E92 M3 write-up)
Gone but not forgotten: '11.75 M3 E92 Le Mans | Black Nov w/ Alum | 6MT (owned 5/2011 - 11/2015) |
Appreciate
0
|
12-03-2012, 02:16 PM | #7 | |
Captain
65
Rep 602
Posts |
Quote:
__________________
e92 m3 6MT, RS4 6MT, S4 Avant 6MT, WRX 5MT, Corsica
|
|
Appreciate
0
|
12-03-2012, 02:52 PM | #8 |
Private
9
Rep 82
Posts |
i thought the car is limited at 155mph, my HUD hit 165mph and then i felt the limiter kicked in. can the calibration be 10mph off at top speeds?
__________________
2015 M6 Gran Coupe
BMS Stage 1 Tune, BMS Intake & Chargepipes, Meisterschaft Catless Downpipes. |
Appreciate
0
|
12-03-2012, 03:21 PM | #10 |
Brigadier General
594
Rep 4,488
Posts |
Yes, error margins can be up to 8%, which would be even more than a 10 MPH difference at those speeds.
__________________
'16 Cayman GT4 (delivery pics, comparison to E92 M3 write-up)
Gone but not forgotten: '11.75 M3 E92 Le Mans | Black Nov w/ Alum | 6MT (owned 5/2011 - 11/2015) |
Appreciate
0
|
03-06-2023, 06:32 PM | #11 |
Enlisted Member
12
Rep 38
Posts |
I seem to be revisiting old threads as of late....but anyone find a solution to this? I'm not much of a coder...but can't seem to find anything on how to correct this. I have factory 20" rims with factory size tires and my speedo is off 3 to 4 mph according to GPS. More annoying than anything.
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|