GingerPuss
Active Member
Hi Folks,
My 'new' (1976) 88' SIII Petrol has only ONE mechanical defect
Driving back from Manchester I seemed to be overtaking lots of cars.. but my speedometer showed 45 MPH !!
I decided to use my SATNAV as a means to check the speedometer. I get the following:
Speedo = 26MPH (SatNav = 30 MPH)
Speedo = 45MPH (SatNav = 58 MPH)
Speedo = 55MPH (SatNav = 65 MPH)
Obviously my speedometer is under-reading (I assume the digital speedometer function of my GPS system is accurate). Given that I do not want a speed camera to flash me unwittingly breaking the speed limit (I don't want to have to use a GPS full time!)... can anyone please suggest what the problem might be and how I might start fixing it.
Wheels/tyres are stock (?) 205 R 16 (Michelin)
Many thanks
Mark
My 'new' (1976) 88' SIII Petrol has only ONE mechanical defect
Driving back from Manchester I seemed to be overtaking lots of cars.. but my speedometer showed 45 MPH !!
I decided to use my SATNAV as a means to check the speedometer. I get the following:
Speedo = 26MPH (SatNav = 30 MPH)
Speedo = 45MPH (SatNav = 58 MPH)
Speedo = 55MPH (SatNav = 65 MPH)
Obviously my speedometer is under-reading (I assume the digital speedometer function of my GPS system is accurate). Given that I do not want a speed camera to flash me unwittingly breaking the speed limit (I don't want to have to use a GPS full time!)... can anyone please suggest what the problem might be and how I might start fixing it.
Wheels/tyres are stock (?) 205 R 16 (Michelin)
Many thanks
Mark