Porsche Enthusiasts Club Forum

I am getting really fed up with my inaccurate speedo, it is at least 15 mph fast at 70 and 10 mph fast at 30, as compared with my RoadAngel. Does anyone know of where I could get the speedo recalibrated/repaired. I know I could get an instrument assembly from a scrappy or eBay but it could also have a big error and the mileage would be wrong. Also are all speedos the same regardless of 944 model?

Does your car have the correct size tyres on?

This will affect the accuracy of the speedo.

I've used Speedy cables in the past, been good service, they'll recalibrate & service.
And this lot http://www.speedograph-richfield.com/ as you'll see from there website been around a long while!

Yes, I have got the correct size wheels and tyres on. Last night I checked various speeds in the gears with the tacho and using the chart in the handbook confirmed that the gearbox hadnt been swapped. It looks like Speedy Cables are going to get another customer.