Spark plug suggestions

TOM-WA-

I have been running Champion RH10C plugs in my 262 for years and I am considering running a hotter plug.



Any recommendations as to what plug I should use and what the gap setting

for the new plugs should be?





THANKS,





TOM

super-six

On my 308 I am using Autolite 437, which would be the equivalent to H-12. They work the best for my engine. From what I understand, former Champion H-10 and H-11 have been combined to Champion 855-1.

Unknown

TOM , you only want to go hotter if your plugs are fouling . You can get too hot and cause trouble . I'm useing NGK 6bL in my 212 and they run real clean but not brown . A very very light tan is all the color you want on the hot side and light grey to white on the cold side . Too white is too cold . BUD