The Ford Barn - View Single Post

rotorwrench · 10-28-2021, 12:53 PM

That seems to be a colder plug than the y-blocks used. 10 versus 18 for the Y-block. I think those were used in Ford I6 engines beginning in the early 60s or so. It's harder to tell now days since the F10 spec is long ago obsoleted to RF10C. Y-blocks would use the RF18YC. Both of these may now be considered as obsolete. A lot of folks changed over to other brands for one reason or another.

Heat range varies with manufacturer but with Champion, I believe the higher the number it is the hotter it is.

10-28-2021, 12:53 PM	#2
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: F10 champion plugs That seems to be a colder plug than the y-blocks used. 10 versus 18 for the Y-block. I think those were used in Ford I6 engines beginning in the early 60s or so. It's harder to tell now days since the F10 spec is long ago obsoleted to RF10C. Y-blocks would use the RF18YC. Both of these may now be considered as obsolete. A lot of folks changed over to other brands for one reason or another. Heat range varies with manufacturer but with Champion, I believe the higher the number it is the hotter it is. Last edited by rotorwrench; 10-28-2021 at 01:02 PM.