Ign Advance on MR-2

[Diehl, Jeffrey]

Ok then let's talk.  You intend to run a separate coil for each cylinder, as
do I.  This does add a bit of complexity to the design.  It also allows us
to have finer control over the spark on a per-cylinder basis.

My question:
Is it worth the trouble?

comments?
Mike Diehl. 

-----Original Message-----
From: Camden Lindsay
To: diy_efi at diy-efi.org
Sent: 8/22/2001 11:28 AM
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 am also working on a dis system, although do not know enough as of yet
to 
set anything up (which is why i am on this mailing list, trying to
learn)... 
but am definitely planning on running separate coils (for each cylender)
as 
the motor is a 5 cylender--

Camden

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