The Jaeger tach is an inductive instrument; that's what the little loop on
the back is... a one turn coil. If you have multiple pulses you can get
erratic behavior at low rpm's. I can't say from personal experience whether
it'll work on an electronic ignition; mine was stock when it ran. Still,
what Peter told me makes sense, and it would appear Theo ran into a similar
problem because he designed a solution also. So... you can try it or not. If
your tach works, good for you! If not, and if you want to use Nisonger, the
price is $275.
Tom
On Wed, May 19, 2010 at 6:21 PM, Would U.Believe <mcdangerous@verizon.net>wrote:
> I don't understand how that's possible because I have Pertronix in my
> distributor and my tach works fine. Must be an anomaly? MGD
>
>
> On 5/19/10 4:52 PM, "Tom Parker" <tkparker1941@gmail.com> wrote:
>
> > Theo, et al,
> >
> > I just got off the phone with Peter Bayer at Nisonger Instruments. Here's
> a
> > summary of the conversation regarding the Jaeger Tach:
> >
> > The tachometer WILL NOT WORK with electronic ignition (Caps mine).
> Nisonger
> > offers a conversion service to upgrade the tachometer so it will work
> with
> > both points and electronic ignition. They test with Pertronics and MSD
> > ignitions (which doesn't mean it will or won't work with other brands.)
> >
> > The price for rebuilding the tach and installing the electronic ignition
> > conversion is $275.00. They don't offer a stand-alone conversion.
> >
> > This may or may not have anything to do with the problems with erratic
> > readings at low revolutions, but, then, it may.
> >
> > Tom
> >
> >
> >
> > On Wed, May 19, 2010 at 10:01 AM, Smit, Theo <Theo.Smit@dynastream.com
> >wrote:
> >
> >> If you have electronics of almost any sort on your car (including the
> >> ignition
> >> amplifier and alternator regulator), then solid core wires are very
> likely
> >> to
> >> give you problems. I understand the desire to have OEM appearance and a
> >> HiPo
> >> motor but if you must have solid core wires then you can't have
> electronic
> >> ignition or alternator regulation. And you may find that your cellphone
> >> doesn't work while you're driving either.
> >>
> >> There are modern spiral-core wires from many manufacturers that give
> equal
> >> or
> >> better performance to the old-school solid core stuff too, while having
> >> enough
> >> RF suppression that you can use electronics on board.
> >>
> >> Cheers,
> >> Theo
> >>
> >>
> >>
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