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Date:         Sun, 14 May 2000 12:06:58 -0400
Reply-To:     Tom and Dana Cates <dcates1@HOME.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Tom and Dana Cates <dcates1@HOME.COM>
Subject:      Re: dwell
Comments: To: David Beierl <dbeierl@IBM.NET>
Content-Type: text/plain; charset="iso-8859-1"

But there is no control module. Just a Pertronix, a coil and the stock dist, wires+plugs.

----- Original Message ----- From: "David Beierl" <dbeierl@IBM.NET> To: <vanagon@GERRY.VANAGON.COM> Sent: Sunday, May 14, 2000 10:08 AM Subject: Re: dwell

> At 23:13 5/13/2000, Mark Rokus wrote: > >Yes, Pertronix are Hall effect based. A hall sensor turns on based on the > >strength of the magnetic field that they see, thus, it is logical to > >conclude that you can effect the dwell by changing the distance from the > >collar (with the magnets in it) and the sensor. ie... the closer the > >pick-up is to the collar (magnets) , the longer the sensor will see > >it. Obviously, if you get too much of a gap, the pulse will be shorter. > > It's logical, but it's not so...decreasing the gap will do nothing (until > you get physical interference), and decreasing it will perhaps make the > timing a little late -- or a bit mushy (until the thing stops working at > all). But the sensor only provides information to the control module; it > has no direct effect on the output. Once the control module knows when the > spark is wanted, it generates a pulse without further regard for the > Hall-effect sensor. > > david > David Beierl - Providence, RI > http://pws.prserv.net/synergy/Vanagon/ > '84 Westy "Dutiful Passage" > '85 GL "Poor Relation"


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