FWIW, adding the Pertronix didn't affect my BJ8 tach at all.
tom
> [Original Message]
> From: Chris Masucci <sooch@houston.rr.com>
> To: <Awgertoo@aol.com>; <healeys@autox.team.net>
> Date: 4/13/06 10:24:48 PM
> Subject: Re: Pertronix interfering with tach?
>
> The pertronix draws less current through the white wire looped behind the
> tach than the points did. Less current, smaller magnetic field, smaller
> current on the transformer secondary winding (inside the tach). Must
> increase the field. Add an additional loop or two to the loop at the
back
> of the tach.
>
> Cheers,
> Chris
> BJ8
> ----- Original Message -----
> From: <Awgertoo@aol.com>
> To: <healeys@autox.team.net>
> Sent: Thursday, April 13, 2006 8:20 PM
> Subject: Pertronix interfering with tach?
>
>
> > I'm posting this for a friend of mine who is not a subscriber but
> > described
> > an interesting situation to me--he says that about the same time he
> > installed a
> > Pertronix unit on his BJ8 his tach started to indicate about 20% low,
> > apparently at all speeds.
> >
> > Does anyone have any experience or suggestions here?
> >
> > Best--Michael Oritt
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