Switches or relays?

[Bruce]

The only multispark jumps I've ever seen were the MSDs.   Granted been a
while since I had access to that good of scope, but I rather doubt any oems
do it.

The better ignition systems will give you a much longer spark.  ie, I've
seen some oem stuff extended form .5 msec sparks to .75 msec using a GM HEI
in place of a Bosch module.
Bruce


----- Original Message -----
From: "Jim Blackwood" <jblackwood5 at home.com>
To: <diy_efi at diy-efi.org>
Sent: Monday, April 14, 1980 8:56 PM
Subject: RE: Switches or relays?


> Well, yeah at least in theory. Kind of depends on the decay rate how
> many actual sparks bridge the gap.
>
> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org] On
> Behalf Of Bruce
> Sent: Thursday, November 16, 2000 8:39 AM
> To: diy_efi at diy-efi.org
> Subject: Re: Switches or relays?
>
>
>
> All the sparks are A/C.  Coil condenser oscillations, an all don'tcha
> know. Bruce
>
>
> ----- Original Message -----
> From: "Jim Blackwood" <jblackwood5 at home.com>
> To: <diy_efi at diy-efi.org>
> Sent: Tuesday, November 13, 2001 9:58 PM
> Subject: RE: Switches or relays?
>
>
> > Normally that would not be the case, although it could be done.
> > Usually
> one
> > lead of the coil primary will be switched while the other goes
> > directly to positive. There is no intrinsic advantage in changing the
> > polarity of the spark for a street engine, motorcycles have used this
> > system for at least
> 30
> > years. A multiple discharge would have sparks going in both directions
> (AC).
> >
> > Jim
> >
> > -----Original Message-----
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of Ron Schroeder
> > Sent: Tuesday, November 13, 2001 3:03 PM
> > To: diy_efi at diy-efi.org
> > Subject: Re: Switches or relays?
> >
> >
> > At 12:32 AM 11/9/01 -0800, you wrote:
> > <snip>
> > >** An analogy:  You seem to think the HV terminals are each the
> > >equivalent of a stick welder's welding rod.  Instead, one is the rod
> > >and the other is the ground clamp.  They trade off functions with
> > >every
> spark.
> > >
> > >--
> > >Ludis Langens
> >
> > Hi Ludis,
> >
> > I hven't really looked into Wasted Spark much but I have a simple
> question.
> >
> > Does the drive to the primary trade functions too (reverse polarity)
> > every other firing?
> >
> > Ron Schroeder
> > WD8CDH
> > E. E. S.
> > wd8cdh at bnl.gov
> > rjs at bnl.gov
> > ron at 112motors.com
> > 631 344-4561 Day
> > 631 286-5677 Nite
> >
> > ----- End of forwarded message from owner-diy_efi at diy-efi.org -----
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