Sorry if this has been discussed before, i did search and nothing of use came up, so here it goes:

What kind of spark plugs should i be running?

Car has a street port, pfc, large single turbo, 550/1600 injectors, and all the other bolt ons. Any help is greatly appreciated.





~Sirrelix

I run 4 x B10EGV plugs. You'd have to get a socket that has been slimmed down but the plugs have worked great so far. Also these are cheaper than the 9's.



Either run those or go with what most people get, 4 x BUR9EQP's.

what brand are the b10egv's?

They are NGK's also.

whats the diff then?

These are like regular spark plugs (they have the litte electrode thingy that you have to set the gap on)



The only difference I really noticed was the cost. They are cheaper and easier to get.

Any suggestions on a good place to get them from?



-Thanks





~Sirrelix

Advanced Auto Parts sells them

Thanks! - What is the advantage of the 10's over the 9's? should all 4 be the same? Thanks abunch for the info!



~Sirrelix

From SPOautos:



"The majority of people I see running 10's and 11's are single turbo guys. The only people I ever see running 10's on a twins car are guys running around 15+psi of boost. I would run 10's on anything over 15psi to be safe. I've put many many miles on 10's with no problems at all. If you have a decent ignition amp they will stay nice and clean.



Just because Mazda ran 7's and 9's doesnt mean anything. That desicion was based on around 10psi of boost and 215ish rwhp. As you increase the hp you increase the combustion btu's and need to run colder plugs. I typically ran 9's from 12-15psi, then 10's from 15 or 16+.



On a side note, I run b10egv plugs (heat range 10)which you gap. I run a low gap of about .022 with them.



I'm sure there are some people on the forum that run a plug colder than they really need to, however if thier car is tuned and will idle good without fouling the plugs then it doest hurt anything. They are only making it more safe, nothing in the world wrong with that. I would VERY much rather run a plug too cold than too hot. That said, there are MANY MANY people on this forum running 10's and 11's because they need them...not just because they are paranoid.



Stephen"