Which Spark Plug is Cooler?

[Little6pack]

AC 44 TS

or

AC 43 TS

 

[WSLN 6]

43

 

[Little6pack]

Cool Thanks What is the benifit of running a cooler plug?

 

[mikestertwo]

Cool Thanks What is the benifit of running a cooler plug?

There may not be. Depends on the motor.

 

[RegalT-type85]

There may not be. Depends on the motor.

Depends on motor, parts I would stick with plan old copper plug with stock range.

 

[pontiac69fb]

Cool Thanks What is the benifit of running a cooler plug?

Less prone to predetonation under high compression, however it's more prone to fouling since it doesn't get as hot to burn off the excess fuel.