Spark plug advice
Rn14yc is what the 405 are so does the heat range go up or down based on the number? Would 14 be a higher (hotter) heat range than the 12?
Higher number, hotter plug with Champion plugs. NGK is the other way. The bigger number is colder.
I would do everything I could to use a a C series so you don’t have the dreaded 13/16 hex. And I’ll tell you why.
Because as much as I say use the C series, when I went into town Wednesday to grab some plugs and other junk to fire the 340 thats on my run in stand, and they only had N series plugs in the heat range I need.
The headers I’m using to fire this pig I’ve used since 1980, so I figured WTH they will be fine.
They go in there, but they are a PITA. I guess when I was younger it didn’t matter, but fighting that bigger socket just pisses me off.
That will be the LAST time I ever buy that dinosaur plug. If they don’t have the C series I’ll either order them, or if I need them in a hurry I’ll use Autolite’s or AC’s.
I now officially HATE the N series plugs to death.
Just an FYI.
