felters Posted February 5, 2005 Share Posted February 5, 2005 Having a tidy up last night! VDO mechanical speedo. It's a 790 tpm unit refurbed last year by JDO Instruments at a cost of £50. Unused since as it didn't fit the CF dash I put in 8-( £30 inc p&p Link to comment Share on other sites More sharing options...
Dave Posted February 6, 2005 Share Posted February 6, 2005 Is it the flat bezzel or round? If flat I will take it. Ta Dave Link to comment Share on other sites More sharing options...
felters Posted February 6, 2005 Author Share Posted February 6, 2005 Neither actually... it's kind of pointy or triangular in cross section IYSWIM... picture below... Link to comment Share on other sites More sharing options...
felters Posted February 12, 2005 Author Share Posted February 12, 2005 and now on Ebay... http://cgi.ebay.co.uk/ws....LC:UK:1 Link to comment Share on other sites More sharing options...
geofff Posted February 12, 2005 Share Posted February 12, 2005 Hi Felters, How do the mechanical systems work? Cable into the gearbox? How do you adjust it for different gearing etc...? I'm going to try and get through SVA with a Sigma bike speedo but this might be a useful back up if that idea fails. I'm running 1800 zetec with RS2000 4 speed rocket box. Ta Geoff Link to comment Share on other sites More sharing options...
felters Posted February 13, 2005 Author Share Posted February 13, 2005 Calculating the gearing is fairly easy assuming you've got a speedo cable fitted. You mark the tyre with chalk, push the car forward so that it rotates 10 times and at the same time count the number of rotations of the speedo cable. The further you push the car the more accurate the calculation will be. Then measure how far the car went on 10 turns of the wheels and a quick bit of maths and you'll have the number of speedo cable turns per mile - you should be looking for a value between 700-1200 or so. You can get inline cable gearboxes from Smiths... I've had a bike speedo and dumped it after a week as it took too long to read. The problem with SVA is I think they require the speedo to be backlit. Cheers Mike Link to comment Share on other sites More sharing options...
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