The difference between the readings is only 5%, probably within their specs. If the true RPM is 680, each is only off by about 2.5%.I dropped and broke my old Innova timing light, so I picked up a new one with Volts/Advance/Dwell/RPM's
and compared it to the multimeter I normally use.
The Dwell and RPM's aren't even close.
I'm going with the multimeter numbers based on how the rpm's sound to me.
Has anyone else had this happen, or did I just get too cheap of a timing light?
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