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Speedo threads - Printable Version +- Austinsevenfriends (https://www.austinsevenfriends.co.uk/forum) +-- Forum: Austin Seven Friends Forum (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=1) +--- Forum: Forum chat... (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=14) +--- Thread: Speedo threads (/showthread.php?tid=9443) Pages:
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Speedo threads - Alan - 28-06-2024 Does anyone know the thread size on input to a PA type governor speedo? Thanks. RE: Speedo threads - Austin in the Shed - 28-06-2024 3/4”x26. RE: Speedo threads - Alan - 28-06-2024 Thanks Dave RE: Speedo threads - JonE - 28-06-2024 Are you also trying to find a die after a mazac failure repair, Alan?! RE: Speedo threads - Alan - 28-06-2024 No, I’m thinking about a reduction gearbox to correct speedo inaccuracy RE: Speedo threads - Dave Mann - 29-06-2024 You could fit a bicycle speedo which is probably easier and cheaper to fit, I fitted them to our cars and found that two PA speedos read correctly and one 3 mph fast. RE: Speedo threads - Alan - 29-06-2024 I’ve got a bike speedo on the RL but I want the original speedo on the chummy to read correctly. It’s a belt drive that provides 3360 turns per mile into a 2240 instrument. RE: Speedo threads - Dave Mann - 30-06-2024 If the chummy has it's original speedo why is the belt drive incompatible? RE: Speedo threads - Alan - 30-06-2024 I used original in the sense that I wanted the speedo that’s fitted to read correctly not to replace it with a bike speedo. The problem is it’s a belt driven system- that outputs 3360 turns per mile. The rather nice speedo head I have takes 2240tpm so it over reads somewhat. Options as I see it are new pulleys, a corrector box or just get better at mental arithmetic. RE: Speedo threads - Ivor Hawkins - 30-06-2024 My speedo works but it it so inaccurate I ignore it anyway. Top speed so far downhill with the win£ behind me is 57 mph. |