Okay So i am more or less a newbie, I know i need a step colder plug with my current set up, running 93 and 27 psi on my red, the car is an 06 MR any recommendations as far as plugs go, any help is much appreciated. please no flaming i have searched, and just come up with a bunch of threads that are more or less filled with garbage, that might as well be french to me, and i failed french in school !

 

I run ngk bpr7es with 29 psi.

 

Bpr7es

 

I am pretty sure with the 9 you don't have options - just use the factory...

 

Non-"garbage" thread:
https://www.evolutionm.net/forums/ev...ead-plugs.html

 

so when you say " none " i am kind of confused because the link that you have included has plenty of people with 9's changing plugs can you explain ?

 

Stock IX iridiums are good to 600+ whp, just need to gap them tighter if you are running high boost. They are GREAT plugs and there's no reason to use anything else.

https://www.evolutionm.net/forums/ev...on-650whp.html

 

if you're blowing out spark you can close the plug gap some, if you need colder plugs you could switch to an 8 or 9

 

I wasn't saying "none." I just said that the thread I linked to was a non-garbage thread; there was a lot of good information in it.

Personally, I am running the Denso IKH24 plugs. Of course, this was before I read about people's recommendation to stick with the stock heat range, especially with E-85.

Recent E-85 spark plug thread:
https://www.evolutionm.net/forums/ev...plugs-e85.html

 

bpr7es are for the MIVEC motor people, if you wanna give suggestion please see what evo "mantosride" drives.