Resistor or Non resistor ?
Now I'm searching something in the same heat range (the RC7YC) it's quite cold.
Now I'm seeing that the Champion RC7YC is NON resistor
(Summit source and http://www.championsparkplugs.com/re....asp?pid=rc7yc )So I checked the RC9YC on the same sources and on Summit it says it's a NON resistor and at www.championsparkplugs.com it's a resistor ..

The RC9YC is reccommended by many heads brands...

RC12YC are advertised as RESISTOR (both on summit and www.championsparkplugs.com)
How 3 spark plug with the same similar part number (only the heat range should chanege.. RC and YC is the same) can be different in the suppression EFI management??
Is there a sure way to tell if the RC7YC is a resistor or not?
-Beppe-

Now I'm searching something in the same heat range (the RC7YC) it's quite cold.
Now I'm seeing that the Champion RC7YC is NON resistor
(Summit source and http://www.championsparkplugs.com/re....asp?pid=rc7yc )So I checked the RC9YC on the same sources and on Summit it says it's a NON resistor and at www.championsparkplugs.com it's a resistor ..

The RC9YC is reccommended by many heads brands...

RC12YC are advertised as RESISTOR (both on summit and www.championsparkplugs.com)
How 3 spark plug with the same similar part number (only the heat range should chanege.. RC and YC is the same) can be different in the suppression EFI management??
Is there a sure way to tell if the RC7YC is a resistor or not?
-Beppe-
The R7 is a resistor plug. The "R" in the champion part numbers represents resistor.
RN-resistor
12-heat range
Y-thread depth if I remember correctly
c- Copper core







