Date:         Sun, 1 May 2011 12:56:59 -0700
Reply-To:     Rocket J Squirrel <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Rocket J Squirrel <camping.elliott@GMAIL.COM>
Subject:      Re: Which tachometer? 400-1300Hz or 800-2400Hz
Comments: To: mark drillock <mdrillock@cox.net>
In-Reply-To:  <4DBDA494.8080502@cox.net>
Content-Type: text/plain; charset="UTF-8"

And this meager info is all that I can find.

Hm. Four coil firings equals two full revolutions of the crankshaft, if
I remember correctly.

So 1000 rpm would have 2000 sparks per minute, or 2000/60 = 33 Hz.
That's nowhere near the two frequency ranges shown in the specs, so
those specs have nothing to do with coil firings. Even if I forgot to
carry a 1 or something.

On Sun, 2011-05-01 at 11:21 -0700, mark drillock wrote:

> I don't think so, based on the meager info provided. The difference
> appears to be important only when alternator signal is used.
>
> Mark
>
> Rocket J Squirrel wrote:
> > So . . . in the case of a 1.9L with a coil to feed the tach, does it
> > matter which of these two gauges one uses?
> > --
> > Rocky J Squirrel
> >