As for the source that recommends this plug, it is the Bentley Manual and
Owners manual. I'm not sure whether it is a colder or hotter plug. I just
know that it has a shorter tip. During my last tune-up, I switched to the
N9 plug, and found that the engine runs stronger. Maybe it's just my
imagination, though.
Eric
-----Original Message-----
From: Sally or Dick Taylor [mailto:tr6taylor@webtv.net]
Sent: Tuesday, November 20, 2001 1:08 AM
To: Eric Conrad
Cc: Jsut4fun@aol.com; 6pack@autox.team.net
Subject: RE: Spark Plugs
Eric---I wonder why it is, that the late model head with its lower
compression would call for the colder (N9) plug? This is the plug that
caused premature fouling in some of the early seventies engines. Do you
remember the source that recommends this heat range for the 75-76?
Also, a "shorter" plug could expose the sharp corner in the head near
the tip of each plug, creating a hot spot.
Dick T.
'73
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