Re: [bmw] re: colder plugs

[tedcrum@xxxxxxxxxxxxxxxxxxxxx]

I don't think much of them. They may help a car with lean-surge due to the 
longer spark length. But they seem to run hot and wear out.

-tc


> 
> tc,
> Why do some people swear by the Bosch Platinum Plus Four and others simply
> swear at it?
> 
> What's your evaluation of this plug?  I read so much bad about it that I
> took them off my E34 540i.
> 
> tsp
> 
> ----- Original Message ----- 
> From: <tedcrum@domain.elided>
> To: "bmw group submissions" <bmw@domain.elided>
> Cc: <MDrainville@domain.elided>
> Sent: Wednesday, December 17, 2003 5:59 PM
> Subject: [bmw] re: colder plugs
> 
> 
> > I don't have my books with me now to see if I can find a plug for you.
> >
> > But a "semi suface discharge" spark plug generates a spark that, over part
> > of its length, tracks across the surface of the insulator. This allows a
> > longer spark for a given voltage and helps clean the plug when it is
> > cool. The "semi" means that the spark also spans a gap, which give
> > protection against the sudden and complete fouling that plagues true
> > surface discharge plugs.
> >
> > The Bosch Platinum Plus Four is an example of a SSD plug.
> >
> >
> > -tc
> >
> >
> 
> 
> 


-- 
Ted Crum
tedcrum@domain.elided
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