Originally Posted by JOKER650
I found the Ir plugs maintained a snappier throttle for a longer time.
The standard electrode ones seem to "wear out" sooner and the throttle response becomes mild.
I had the IR ones in for 2 years and replaced them with the standard ones. The standard ones didn't seem as peppy right from the start.
I will be throwing a new set of IRs in the SE this winter.
I don't know, IMO it's more a psychological thing.