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Speedo telling porkies

3 posts in this topic

Posted · Report post

Took the 370 for a run up the highway and kept getting passed by just about everyone and I am thinking hmmm. this aint right. I'm doing the speed limit 110k and it feels slower than that. Went out a week later with the old tom tom sat nav and it confirmed what I thought. My speedo is about 10kph higher in the car than satnav. I think there are old threads on this topioc but wondered if there was a solution?

thanks

Peter

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Posted · Report post

I run a GPS speedo from Jaycar for this very reason.  I have 3 sets of wheels and tyres and each has a different rolling radius

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Posted · Report post

Ta mate. Looks like I might have to do similar

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