Ignition only

[don.broadus at exeloncorp.com]

sounds good to me Dr. Plecan

> -----Original Message-----
> From:	Bruce Plecan [SMTP:nacelp at bright.net]
> Sent:	Friday, November 10, 2000 10:25 AM
> To:	diy_efi at diy-efi.org
> Subject:	Re: Ignition only
> 
> 
> It's an EE thing.
> The spark is A/C so nothing is backwards
> There is a 50-50 chance on which way the spark lights, and for the first
> .00000000001 usec (time approximate) does it really matter?.
> It's the repeated colapsing on the magnetic fields that generate the
> current
> to maintain the firing line on a scope.  Once the ion level between the
> two
> electrodes drops, the resistnace goes high the coil condenser oscillations
> decay, then you can easily see the A/C component of the signal, and event
> over, points close signal and the coil starts to saturate again.
>      If you think of the secondary as A/C things make sense rather then
> some
> of the other explainations, floatin around....
> 
> I have never seen a proper tuned engine show where one side is different
> from the other on DIS plugs,  there are the same differences with dissys
> on
> some engines.  Largely do to other things like the coolant by pass lines
> being biased toward on side of the other.  On v series engines there is
> usually one thermostat so one head is always running a tad cooler then
> the
> other in this reguard.
> 
> Bruce
>    That's how it looks to me,
> 
> 
> 
> I'm having trouble understanding the concept of firing the second plug
> > backwards.
> > After the spark jumps the gap on the first plug, isn't the "path of
> least
> > resistance"
> > going to be head-block-chassis instead of trying to jump the airgap of
> the
> > second
> > plug?? (compressed or otherwise). I'm probably missing something basic
> here.
> >
> > TIA
> > Rod
> > 944 turbo (+NOS and big Turbo)
> > only 7000 RPM so 1 coil 1msd. (sufficient??)
> >
> >
> >
> >
> > >0ne difference I didn't see mentioned is that waste spark systems
> > >fire one plug "backwards". (Normally the hot center electrode is
> > >negative, since it's electrons being emitted that actually start
> > >things off, as in vaccum tubes.) This probably means that the plug
> > >gap in those cylinders cannot be as large as in a "forward"
> > >cylinder, but I'm not sure if this is a meaningful difference or
> > >not.
> >
> >
> >
> --------------------------------------------------------------------------
> --
> > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the
> quotes)
> > in the body of a message (not the subject) to
> majordomo at lists.diy-efi.org
> >
> >
> 
> --------------------------------------------------------------------------
> --
> To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the
> quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org


*********************************************************************************
This E-mail and any of its attachments may contain Exelon Corp. proprietary
information, which is privileged, confidential, or subject to copyright 
belonging to the Exelon Corp. family of Companies.  This E-mail is intended
solely for the use of the individual or entity to which it is addressed.  If
you are not the intended recipient of this E-mail, you are hereby notified
that any dissemination, distribution, copying, or action taken in relation
to the contents of and attachments to this E-mail is strictly prohibited
and may be unlawful.  If you have received this E-mail in error, please
notify the sender immediately and permanently delete the original and
any copy of this E-mail and any printout.  Thank You.
*********************************************************************************
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org