Ign Advance on MR-2

[Bruce]

From: "Camden Lindsay" <cjl169 at hotmail.com>
Subject: Re: Ign Advance on MR-2
> >Ford Zetec engines are fitted with a neat double coil assemby with 4 HT
> >leads which is ideal for a home-brew DIS. The only production DIS I know
of
> >with 4 coils was a coil-on-plug system by (if I recall correctly)Volvo.
> I believe it is the Saab DIS... which uses a secondary spark after
ignition
> to check ionization within the cylender, and to tell a whole bunch of
> differnet things (knock, pressure, rich/lean??,etc).. each coil- on - plug
> pack houses (or so i've read) a capacitor that is used for the secondary
> spark.....

I thought they immediately applied 80v to the HV wiring to use as a sensor.
Bruce

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