I am currently running the factory 9 turbo on 91 octane + 100% Meth and ~30psi peak. I have been using the factory plugs and gap, but wonder if it would be better to change the gap. What is the generally accepted rule for running 30psi and gaps on a 9 ? Thanks

 

i am wondering where you can buy new plugs for the evo 9 i need some new ones! lol

 

I have Denso II step colder plugs. You can find them by searching on the internet. AMS also sells NGK plugs on there website. They are competition spark plugs and they are not cheap. All for evo IX.

 

^^ OK, but how are they gapped????

 

Same setup as you here, with no issues.

91 octane, 100% meth, 28psi, stock 9 plugs/gap.

 

gap 0.24 for pump. High boost and meth you usually gap them down to 0.22. good luck.