> I've spent the last hour on the net looking for coils
> that will
> fire
> two plugs simultaneously. Maybe I'm phrasing the search
> wrong, but
> so far I have found nothing. I looked at all the
> coils on
> the MSD
> site. There is very little description of the
individual
> coils. Can
> most coils handle rotory rpm? I would appreciate a
> point in the
> right direction. Thanks, Jerry
>
> Jerry,
> Try motorcycle coils. many are dual lead. Also try using
> "dual lead
> secondary ignition coils" in your browser. there are
plenty of
> them.
> Several of the 4 cylinder Subarus also use dual lead coils.
> Bill Jepson
>
>
> I think most of those coils are for "wasted spark" systems.
> Maybe look
> for that..
>
>
> Regards,
>
> Matt-
>
> The V6 GM engines use a wasted spark system with 3 dual tower
> coils. I
> ran my 20B on a test stand using a cobbled up ignition system with
> three
> Buick V-6 coils. They're pretty cheap (< $10/ea). I modified
the CAS
> by adding a third pickup, all equally spaced (120* apart). Then I
> used
> 3 early GM ignition trigger modules. That along with a Holley 4-
> barrel
> and we had liftoff. It worked great. I bought an EC-2 later on, and
> that's what I'm using now.
>
> Mark S.
Thanks Mark. Excellent info. Does the stock CAS pick up 180º
apart. If so could I use it to fire a back up coil for the single
rotor?
FYI, I emailed MSD and received the following response.
"Thank you for your interest in our products. A coil that has two
high tension outputs that fire simultaneously (Wasted spark coil) from
the MSD line of coils would be; PN.8204 or PN.8224, you can also use
the
leading coil from any (1986-1991) second generation Rx-7."
Matt,
There is an early CAS that looks sorta like a distributor. I assume
that's the one you're referring to. It has a two-pointed rotor, but it
turns at half the crank speed, so it would trigger once per rev. It
could be used to fire a single coil as I described earlier using a
ingition module such as the GM unit I used. You could also fire a dual
tower coil this way too. If you need it to fire every 180* of eccentric
rotation, you would need to either add another pickup, or add two more
points to the CAS.
Mark
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