plugs & hp increases

Barney Ward bvward at IDT.NET
Wed Jun 18 14:15:09 GMT 1997


Gregory Chan wrote:
> 
> > >Jeffrey: Another explaination for the HP increases you saw by changing
> > >plugs (and I've heard this attributed to Bosch Platinum plugs in '92
> > >and later 3 series BMWs) is that with that plug you're getting some
> > >detonation and the knock sensor is dialing back the spark advance.
> > >I've used Bosch Platinum plugs in my VW Jetta, it really liked them,
> > >but it sounds like some cars don't like them for whatever reasons.
> > >
> >
> Japanese cars don't like Bosch plugs. I spent days figuring out an
> erratic idle problem which disappeared when I reverted to NGK.
> My buddy was also having the same problem with the same cure.
> I heard they work beautifully in German cars though.
> 
> gchan at compserv.senecac.on.ca
Please explain how the nationality of the car affects plug type. Do they
use different materials in the cylinder heads? This seems like saying
"my Pinto runs good on Amoco, but my Vega likes Shell." What's the
correlation?
Barney Ward



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