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[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
> Date: Tue, 16 Dec 2003 12:23:18 -0500
> From: "Michel Drainville" <[email protected]>
> Subject: [bmw] Colder spark plug
>
> Hi.
> I need your help on this one. My engine(M42) uses NGK BKR6EK plugs. I
> installed a turbo on it last summer. I would like to go to a colder
plug.
> So, the next colder plug is a BKR7EK. When I search the net for the
7EK,
> the only places selling that plug are motorcycles and snowmobile stores.
> Is is the same plug as in my car, except for the heat range? Also, some
> list the extension U (BKR7EKU).
> According to NGK, the U means: " Semi-surface discharge" What does that
> mean? I don't know.
>
> here is a link explaining the NGK numbers:
> http://www.corollaperformance.com/TechInfo/NGK-Info.html
>
> and here, a store selling plugs for marine equipment and motorcycle
which
> have my #s.
> http://www.southernms.com/online/pdfs/electrical.pdf
>
> Can anyone help me?
>
> Thanks in advance
> Michel.
--
Ted Crum
[email protected]
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