[TR] Sparkplugs for TR3A

[Dave MacKay]

 Sparkplugs for TR3A

Hello:

I’ve been running Champion L87Yc plugs in my 1960 TR3A, gapped to
0.025”. Although
they’ve been fine, I’ve always been concerned about the amount of soot on
them at the end of each driving season. Thinking the soot might be dur to
too rich a mixture, I rebuilt my carbs but didn’t notice any change in the
amount of soot. It was suggested that I might want to try a hotter plug
since that might burn away more of the soot. According to Champion, the
next hotter plug to the L87YC would be the L92YC.

What concerns ought I be aware of in running a hotter plug?  Has anyone of
the list had experience with L92YC plugs?

I researched other plugs that list members are using and found that several
have had good success with NGK BP6HS. According to NGK those plugs have
been discontinued and the recommended replacement is the BPR6HS (same plug
but with a resisitor). I thought I might try a set before moving to a
hotter plug.

I’d welcome any comments.

Dave MacKay

1960 TR3A s/n 68639L

Near Toronto, Canada
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