Is there any big difference? NGK sparkplugs offcourse. Or does it hurt the engine? Khris

 

I've been running 9's (all trailing plugs) all around for about a year and a half now.

Seems fine.

 

i'm running them and the car runs a little more rough when cold but seems to drive slightly better when fully warmed up.

 

I too have 9's all the way around. I am on my second set. The car runs fine. I have another set at home. They will be going in when needed.

9's for me!!

 

I am and have been for a while, seems good.

 

Cool thanks alot everyone,

 

For higher rpm and spirited driving, 9s all around is the way to go. I'm running 10.5s all around and loving it

 

9s al around here as well.

I never really noticed any performance difference, but I had to replace them because one of my stock ones was "torn" at the connection part thus creating sparks everytime the car is on.

-Dan

 

I run 9s all the way around. I think you only need to do this if you race the car or are running higher boost a lot.

9s do make the car run rougher when cold. Putting in 7s give me a nice smooth idle when cold, with 9s it is rough slightly.

Also the 9s are more prone to flooding since the plug doesn't warm up as fast (or run as hot) it carbon fouls more easily.

 

Im running 10's all the way around, car starts up instantly but the car is a tad rougher until its warmed up, which I don't drive it until its warmed up all the way anyways.