Macan EV Road Trip by Out of Spec Dave - Part 1

[Yves]

Well I have the Macan S 20 inch wheels with winter Tires fitted, the error is less and they look great on the Turbo … Also the car is very quite now with the Goodyear winter tires, even softer ride …

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[evdriver2016]

Hi guys Yes indeed I was learning on the fly Hope you all don’t mind my short format YouTube videos Very happy to be part of this community now! Go easy on me though as I make mistakes along my journey We really LOVE this car!

thanks for the videos.

Your spec and thoughts on it helped keep mine reasonable.

 

[PrudentOcean]

Don’t forget the impact that tire pressure has on the circumference.

Higher pressure results in a larger distance traveled for each rotation., and a faster actual speed relative to what the speedometer indicates. A under-inflated tire gives a quieter and more comfortable ride but results in worse efficiency due to increased rolling resistance, and lower speeds.

 

[Wivenhoe]

In Europe and the UK the law states. A speedo must never show less than the actual speed, and must never show more than 110% of actual speed + 6.25mph. So at say 70 mph, it can never be less but could be so inaccurate it could comply by reading 7 + 6.25 + 70=83.25 !

To ensure that they comply with the law and make sure that their speedometers are never showing less than true speed under any foreseeable circumstances, car manufacturers will normally deliberately calibrate their speedos to read ‘high’ by a certain amount. As your satnav is not the designated device by which a car’s speed is measured, it does not need to incorporate any fudge factoring.

I’m not defending it, but I can’t see any German manufacturers recalibrating speedos for different countries.

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