So last year I was at 370whp and I was using the bkr7e's

this year im shooting for 500whp,

what heat range should I be going for?

is there a guide somewhere on how to tell which ones you need?

iridium vs copper??

 

Learning to read the plug will help a lot, but I'd say that the 7's are probably still just fine for you..

 

I would like to know too about the iridium bs copper?? Anyone has the part # for the iridium plugs??

 

just stick with the brk7es unless your going over 600 youll be fine

 

xenocron sells all the different plugs on his website, including the iridiums,

but I dont know if they make or do anything better