paulj1 Posted July 19, 2013 Share Posted July 19, 2013 As per title really can you calibrate the supra Speedo as mines a tad out. Cheers Paul Quote Link to comment Share on other sites More sharing options...
SteveC Posted July 20, 2013 Share Posted July 20, 2013 I assume it's reading high? I believe all speedos read a little high, and years ago I was told that manufacturers make them this way on purpose. I found that when I went to 18" wheels, due to the slightly larger overall diameter the speedo was that bit more accurate (the larger tyres increased the gearing slightly). At an indicated 100mph, mine's actually doing around 95mph. I suspect the only way of calibrating the speedo property, would be with an adjustable electronic device similar to a speedo convertor. Quote Link to comment Share on other sites More sharing options...
David P Posted July 20, 2013 Share Posted July 20, 2013 Pull off speedo needle, use sat nav to find 70mph and pop it on at 70mph. Quote Link to comment Share on other sites More sharing options...
Stephendjb Posted July 20, 2013 Share Posted July 20, 2013 Use a universal yellow box. Quote Link to comment Share on other sites More sharing options...
straightsix Posted July 20, 2013 Share Posted July 20, 2013 Pull off speedo needle, use sat nav to find 70mph and pop it on at 70mph. Quote Link to comment Share on other sites More sharing options...
David P Posted July 20, 2013 Share Posted July 20, 2013 I've ran my Supra on both 17's & 18's, both 4.083 and 3.769 diffs and several different tyre sizes and profiles to achieve the ratio and ride quality I was after. This speedometer correction method I've used several times, having cruise control makes the job a lot easier. Quote Link to comment Share on other sites More sharing options...
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