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tachometer cable rpm
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Topic: tachometer cable rpm (Read 848 times)
mnahon
Full Member
Silver
Canada, QC, Montreal
Posts: 436
tachometer cable rpm
«
on:
September 23, 2024, 18:37:27 »
Hi,
I'm wondering if anyone knows whether the tachometer cable spins at engine rpm, or some fraction of that? I'd like to try to set up a bench calibration of the tach similar to what Pawel did for his speedometer.
https://www.sl113.org/forums/index.php?topic=36590
Thanks,
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Meyer Nahon
Montreal, Canada
1968 MB 280SL Auto Euro LHD Silver
2021 Tesla Model 3
mnahon
Full Member
Silver
Canada, QC, Montreal
Posts: 436
Re: tachometer cable rpm
«
Reply #1 on:
September 29, 2024, 03:01:55 »
I'm going to answer my own question: it looks like the tach cable spins at half engine speed. I tried driving the tach with a couple of different drills whose speed I knew. In both cases, the tach read about twice the rpm of the drill.
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Meyer Nahon
Montreal, Canada
1968 MB 280SL Auto Euro LHD Silver
2021 Tesla Model 3
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tachometer cable rpm