[Shotimes] bosch platinum +4's

[Zach Leahy]

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