I'm having a 408 stroker built 9.7:1cr and am going to be running a f-1a-94 procharger on that shooting for 800rwhp not sure what kind of boost I'll be running I'd guess 12-14psi on 93 and meth. Will a tr6 plug be fine for that or should I go colder? Thanks!

 

I would start with a BR7EF which is a non projected Heat range 7. Once you get it going then check the plugs and see how they look.

 

You're the 3rd person to tell me to try those. So I guess I will give them a try!! .035 gap good for that? Or would you go less?

 

I would do .024