Noob question

[campbellju]

I just did a search on plug heat grades and after wading through 290 posts I still can't find an answer. Is there a way to do relational searches like +blah "blah blah" etc? I can't seem to get the search to work for me?


Onto my question. I have NGK iridium heat grade 8 plugs in the car and they were bought when I was targetting 380hp. I'm now looking at 430hp and believe them to be okay still (gapped to 0.7mm). I can't seem to find what others are running at this level and would appreciate some confirmation.

Cheers,
Jim

 

[JIMMYBACK]

im running ngk grade nines for 450 bhp if that any help there was a guide on here some where

 

[campbellju]

Thanks Jimmy, that was my worry that I need 9's too. I might need to order some 9's quickly just in case.