[Shotimes] bosch platinum +4's

[Kevin & Cheryl Airth]

Thanks Paul. I did not know that.
.
.


  Actually the 1,2,&3 plugs fire + voltage and the 4,5,&6 fire - voltage,
everytime.  They do not switch back and forth.

  Paul
    ----- Original Message -----
    From: Zach Leahy
    To: Kevin & Cheryl Airth
    Cc: SHO
    Sent: Thursday, April 07, 2005 9:20 AM
    Subject: Re: [Shotimes] bosch platinum +4's


    Yeah that's about how I thought it was.

    Z

    On Apr 7, 2005 8:24 AM, Kevin & Cheryl Airth <clubairth@peoplepc.com>
wrote:
    > Zach:
    > Ford calls it waste spark ignition. 2 cylinders fired every time. The
dead
    > cylinder has the spark jump from ground to the electrode. The cylinder
under
    > compression has the spark jump from the electrode to ground. The
    > conventional way. This is why the SHO needs the PP or double platinum
plugs.
    > Otherwise the waste spark cycle will cause short plug life from spark
plug
    > metal erosion on the dead cylinder. Causes the plug gap to widen fast.
It's
    > kind of like having a small EDM (Electrical Discharge Machining) in the
    > combustion chamber. Of course we are all spoiled and now expect spark
plugs
    > to last 100K miles.
    > .
    > .
    >
    >
    > > Don't half of the plugs on the SHO really fire backwards from normal
    > > thinking.  i.e I was thinking the polarity was reversed on 3.  Maybe
    > > I'm nuts.
    > >
    > > Z