TR6 Spark plug question

[Geo Hahn]

I believe the 'C' stands for copper. I would think L87Y and L87YC would be interchangeable.

So-called TRactor engines (TR2s, 3s, 4s) use plugs with a ½" reach. I think I learned from this thread that TR6s have plugs with a ¾" reach.

Your pinging, of course, can possibly be addressed by either higher octane fuel or less timing advance.

 

[poolboy]

Here's the Champion Codes:
https://www.dinoitalia.com/images/tecnica/candele/Champion-spark-plugs-codes.gif

 

[PatGalvin]

Thanks guys. I appreciate the quick responses.

pat

 

[M_Pied_Lourd]

At the risk of reigniting the feud..... I had problems with the Champion plugs a few years back and switched to the NGK. I wonder where the Champions were originally made and where they are made now?

Checked my boxes today...Mexico.

Cheers
Tush