Speed value

[Coupe]

I ride my Marauder with winter shoes. it´s the same size like the summer tires and i know, as i change the tires, i checked the speed with a TomTom and my OEM navigation and it was nearly exact the same speed by 120km/h. (120km/h at the gauge and 119km/h at the TomTom/OEM navigation. Now, when i was drive with a speed with 120km/h, the TomTom and the OEM navigation show exact the same value146km/h!
what can be the reason?

[xopher]

This is a bit hard to understand, but let me clarify your meaning. Tell me if this is right:

Last summer with your summer tires, your speedometer and your GPS both read 120 kmh.
Then you changed to winter tires, and your speedometer read 120 kmh and your GPS read 119 kmh.
Now some time later, still with winter tires on, your speedometer reads 120 kmh but your GPS reads 146 kmh.

Did I get that right?

[Coupe]

yes, that´s correct

[xopher]

OK, that's good. Now that I understand, I have a few questions.

Have you been able to reproduce your GPS measurement? Does it still read 146 when your speedometer reads 120?

Also, have you made any changes to your gears or tune since the beginning of winter?

[Coupe]

yes, the measurement is still 146 when i drive 120! on both GPS, TOMTOM and the OEM navigation!
i have load a tune after tire change, the SCT FLASH X3

[jfclancy]

you mention the tires are the same size , but are they the same diameter?
What I am suggesting is that due to wear on one set or the other there may me a differance in diameter of your tires. OEM are i believe 29 inches when new just a wild a** guess but some winter tires wear quite rapidly so this could be the problem. oops 29 inches = 73.66 cm or thereabouts


Joe Clancy:beer::beer:

[xopher]

yes, the measurement is still 146 when i drive 120! on both GPS, TOMTOM and the OEM navigation!
i have load a tune after tire change, the SCT FLASH X3
Since you have installed a tune, this may have changed how your speedometer is reading.

Did you purchase your SCT Flash X3 from one of the Marauder specialists in the US such as Dennis Reinhart with Reinhart Automotive or Lidio Iacobelli with Alternative Auto or did you get it from somewhere else? Also, did the X3 come with a pre-loaded tune, or are you making modifications to the tune yourself?

[Coupe]

Lidio w´´ll not send me back my flash, cause he didn´t ship outside US thats: :down:!
I drive with my X3 round about one year with the right speedometer value, but not long ago, i tried my OEM performance for a couple of weeks and than, i flashed the tune gain. maybe id did a mistake than, with the axle ratio or whatever!
thank you, for the tip, i try it today!!!!

[252life]

Since you have installed a tune, this may have changed how your speedometer is reading.

Did you purchase your SCT Flash X3 from one of the Marauder specialists in the US such as Dennis Reinhart with Reinhart Automotive or Lidio Iacobelli with Alternative Auto or did you get it from somewhere else? Also, did the X3 come with a pre-loaded tune, or are you making modifications to the tune yourself?


He bought it from me (I bought it from Wes / Innovative interceptors), and It's has Lidio's 3:55 and 4:10 91 octane tunes , if I remember correct.


Coupe,

Return the car to stock and reinstall the 3:55 tune.
(I think maybe you installed the 4:10 tune thats why the speed was showing 146km/h)

[Coupe]

YEAH!!! correct! that was the reason! thank you!!!!