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tach, vs. dwell tach, vs emperical testing.

To: spridgets <spridgets@autox.team.net>
Subject: tach, vs. dwell tach, vs emperical testing.
Date: Mon, 14 Jul 2003 19:28:46 -0700
Hello spridgets,

      by now nearly everyone is familiar with my problems in
      calibrating my tach, to a dwell tach to emperical testing
      (measured mile/time)... well.. to add to the problem, which i
      thought i had solved, it turns out the tach is temperature
      sensitive.??????!!!!!!!

      as i drove to the historic races saturday, it was showing 4100
      rpm at 60 mph.. about 68 degrees F., ambient temp. ... going
      home in 90 degree weather is was showing 4600 rpm, again at 60
      mph. .. so i recalibrated the tach when i got home.... later
      that evening when the temp cooled, i had to reset it .. AGAIN...
      all seemed well driving to work, (cool temp) but driving home
      the tach again read high.... today .. same thing... so i
      recal-ed again when i got home... put it spot on with a dwell
      meter (my reference) ... now that the temp has cooled outside, i
      just checked and it is reading lower.... ..

      anyone else have this problem? ... is it a pertronix issue?  ..
      should i bag it all and buy an aftermarket tach that just runs
      off the coil? .... do the Frank thing and get a newer small one
      and stuff the guts in present one?... go to autogage?...

      hints, tips, suggestions, welcome...........

-- 
Best regards,
 Bill                          mailto:pythias@pacifier.com

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