Date: Sat, 29 Nov 2003 20:06:55 -0700 From: "jon banquer" <myfirstandlastnamenopsamo.com> Subject: Re: NGK Spark Plug Question
"Grunff" <grunffnopsam.com> wrote in message news:1070156243.18856.0nopsams.uk.clara.net... > jon banquer wrote: > > What is the difference between NGK BCP5EV, NGK BCP6EV and > > NGK BCP7EV ? > > > > I have a 91 900S 16V non-turbo. The car currently has BCP6EV's. > > How do I know which one is right ? The car is completely stock. > > Temperature - more specifically, the distance between the base > of the porcelain insulator and the main plug body. The longer > this is, the hotter the plug runs. > > Plug temperature is very important, especially in a high > compression ration engine, and doubly so in a turbo. Too cold, > and the plug will foul easily because it won't burn off > accumulated crud. Too hot, and you'll get predetonation. > > Your car needs NGK BCP7EV. You can get away with NGK BCP6EV, but > definitely the 5. > > -- > Grunff > Which plug is the hottest plug of the three ? You wrote : "You can get away with NGK BCP6EV, but definitely the 5." Do you mean: definitely *not* the 5 ? IOW, do you mean the NGK BCP6EVand the NGK BCP7EV are okay but do *not* use the NGK BCP5EV ? Thanks, jon
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