I´m runing 14-15 lb in my car , and have some misfire problems at wot, I have denso iridium sparks IKH22 gaped at 0.8mm.What is your spark plugs gap , for you guys that are runing 15 or more lb????
I have a flat 11:1 AFR at wot , maybe this is causing my misfire events , but not sure , anyway I don´t want to change my AFR because I like the safe side....

 

I am running 2 step colder plugs at the gap they come with, not sure what it is but I did not change it

 

I think those come gapped at around .033".

the stock heat range (5) and the cooler (6) plugs both come with a .11 mm gap (.044")

 

thanks so that is the same 0.8 mm

 

Hi gus
I did check my AFR today and is around 10.8-11.1 at wot, I will try with a 11.2-11.4.My misfire events aren´t all the time , just sometimes............

 

Hey Alejandro I would say that leaning it out will probably help, I run mine in the low 11's in the middle of the rpm's but lean it out up top to mid/hi 11's