<VV> RPM & Dwell...

[Andy Clark]

Tony, since the Pertronix uses a Hall-effect transistor to do the switching,
I think dwell readings are meaningless. Further, it may not drive the dwell
meter adequately. So, were I you, I'd ignore the reading. Be sure to reset
the timing after the installation of the Pertronix because the trigger point
for the coil changes slightly.

Re the tach issue: make sure that the tach wire is on the negative terminal
of the coil. What you're seeing is strange, and I have no immediate
explanation for it. I've used a Pertronix for years with a stock Corsa tach
and everything functions as it should. Also, you should check the dash
ground. They are notorious for poor connections that can introduce really
weird instrument behavior.
HTH
Andy Clark
1966 140/4 Monza Sedan
1966 140/4 Yenko Clone
1966 180/4 Cord 8/10 #60
----- Original Message ----- 
From: "Secular" <rusecular at yahoo.com>
Sent: Wednesday, October 18, 2006 11:35 AM
Subject: <VV> RPM & Dwell...



  Two questions:

  I just installed "Pertronix I" on a friends' car (65 140 HP -- 4 Carb).
The car
  starts fine and idles nicely, however, when I check the dwell, it shows 26
!
  is that normal?

  Also, the RPM on a dwell meter shows 800 @ idle, however the
   gauge on the dash (which was working fine before
  pertronix) shows only 150 RPM !

  When I rev the car, the rpm on the dash works fine (or seems to).

  When the car is turned off - the gauge on the dash (not the car) surges to
  around 2500 RPM and then goes to zero...

  Any ideas?

  Regards,


  Tony