Life is hell without golden rules and information and I'm in a constant state of confusion about plug temp ranges and what are the guide line for change, air temp, nitro content, head shims, also, how do the brand numbers indicate hot/cold...

Some one help an ol' codger please............

Jacko

Monty,

please open yer 'bible' and make a new conversion to the sinners of the burnt plug cult..................!!

Jacko

Use the search?

There is a lot written about headshims, nitrocontent, plugnumbers, weather, ignition and compression.