ChrisC Posted June 11, 2013 Share Posted June 11, 2013 Hi All I have just purchased an ex 2011 Academy car that has had a significant cosmetic make cover, as my car to return me back to Caterham ownership after a 10 year absence. The make over included the swap to 205/55 R13 CR500 on the rears, and on the way home I noticed the speedo was not a accurate as it could. I have looked up the speedo calibration process and the revs per mile from the Avon site, but I don't know the number pulses per revolution from the wheel sensor. So can someone assist me with the following. - The correct setting for a 2011 Academy car, so I can reverse calculate the correct setting for 205/55R13 CR500's? or - The number of pulses per wheel revolution? or - The correct setting for 205/55R13 CR500's? My speedo is the electronic type with the single button. Many thanks is advance. Chris. Link to comment Share on other sites More sharing options...
michaeljclark Posted June 11, 2013 Share Posted June 11, 2013 The correct speedo setting for 205/55R13 85V CR500's (according to the document I have) is: 039558 Using the correct setting (from same document) for my 195/45R15 78V lead to a 10% under read (according to 2 GPS units) across the whole speed range (10-70 MPH officer), so I upped my settings by about 9% (just to keep the speedo slight under what the GPS said. Mike Link to comment Share on other sites More sharing options...
ChrisC Posted June 11, 2013 Author Share Posted June 11, 2013 Thanks Mike, thanks the starting point I was looking for :-) Is that "document" in electronic form by any chance? and if yes can you send it to me? Chris. Link to comment Share on other sites More sharing options...
michaeljclark Posted June 11, 2013 Share Posted June 11, 2013 Quoting ChrisC: Is that "document" in electronic form by any chance? and if yes can you send it to me? It is and I just have 😬 Look out for an email from my blatchat username @ hotmail.com Cheers Mike Link to comment Share on other sites More sharing options...
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