strobe tachs

Posted by LK on June 07, 2005 at 19:21:10 from (64.202.127.228):

In Reply to: Thanks! Jerry/MT!! posted by Andrew H on June 07, 2005 at 17:57:15:

Uh, since there is no ignition, I don't know how an automotive strobe light would help. If it is a gas engine, a cheapie ignition analyzer will tell you rpm.

However, there are strobe lights that you vary the flash rate manually until a rotating shaft appears to stop. Then, if you know how many flashes per second it is putting out, you can determine rpm.

Of course, this is presuming that you have a rotating shaft you can see... and I bet that for the price of such a strobe, you could just get your tach fixed.

All this to say, don't expect an automotive tach to do you any good if you have a diesel. The kind of strobe I am talking about is an industrial instrument, like this one for $289 (http://www.kerncoinstr.com/461825.htm)

Google "strobe tachometer" and you'll see a bunch of hits.

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