DIS Explainations

[Pete Datcuk]

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  The plugs are indeed wired in series, and the polarity is not =
switched.  One plug will spark from the center electrode to the outer, =
and the other will be opposite.  That is the reason behind the dual =
platinum spark plugs.  The spark could be originating from either =
terminal, depending on the location of the plug in the engine.

Pete Datcuk
Mechanical Engineer
Sewell, NJ
'87 Fiero, soon to be Northstar'ed :-)
'67 Jeep Commando, to be risen from the dead ;-)


-----Original Message-----
From:	Raymond C Drouillard=20
Sent:	Sunday, March 22, 1998 2:27 PM
To:	diy_efi at efi332.eng.ohio-state.edu
Cc:	diy_efi at efi332.eng.ohio-state.edu
Subject:	Re: DIS Explainations


Are the plugs wired in series?  How is this accomplished?  Since the
outer electrodes of all the plugs are grounded to the block, I was
assuming that they were wired in parellel.

To wire them in series, we would not be able to use the standard
autotransformer.  Instead, the secondary would have to float.  Also, the
direction of the current would have to be reversed based on which plug =
is
to be fired, since the plugs are designed to work with a specific
polarity.

Ray Drouillard

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