pining,twin plugging,etc...

Gary Derian gderian at cybergate.net
Wed Mar 11 14:09:32 GMT 1998


SAAB already uses the piston as the anode.  There is a little bump on it.
It also has the advantage of a larger spark gap with more advance to better
fire under part throttle conditions.

Gary Derian <gderian at cybergate.net>

>Mike:
>
>> I think the best way would be to use indiviual coils for each plug
>> with little of no wire, didn't someone have a coil that plugged directly
>> on to the end of a spark plug ?
>
>I have a feeling that SAAB did this, although it could have been Audi or
>Alfa... either way it seemed to do the trick.
>
>I looked for the article on twin plugging a head, but could not find it.
> I do remember that it was a success because the pinto's plug
>positioning is so bad,  16v heads or heads with inclined valves that
>allow a central positioning of the plug will not gain over a single
>plug.
>
>How about using the piston as the anode, with a cathode point in the
>head TDC, a big ass coil to drive it, and the spark would travel right
>through the compressed charge, keep the spark going until the piston
>reaches say 5deg BBDC.  Okay so we would have to use some form of
>insulation on the bores..
>
>Rob Humphris
>>
>>




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