i have a 90 civic si with a t-25 running 6 - 8 psi. was wondeing what NGK plug i should use? thanks for all ur help Brian

 

If you go to www.ngksparkplugs.com they have a part finder you can use. Once you find out what spark plug you need for the stock engine just get 1 or 2 steps colder depending on how much horsepower your making.

 

BKR7e-11 I believe is the one you want. Is anyone here good at reading plugs.. What do these tell you?

 

I;m not an expert but i would say you are running rich.Thats what the ones in my car looked like whan I bumped up the fuel pressure by 4 pounds.

 

such great information yet it is so incredibly lacking in detail, could you elaborate on this "colder plugs" theory you have since there isn't an option on the website that says "click here for colder plugs"

thanks.

--brent

 

I think those look fine.
Those Iridiums?

BKR7E-11 is what you want.

Hard to read (cant link full res pics ), but the 7 is heat range.

 

Those are the stock platnum ngk.. the car was running horrible with them in. I switched over to autolite 3922 which is non platnum one range colder.. its running much better. I know the car is rich from the gas smell it has.. I hope to fine tune it soon. I think the platnums were too hot... if you look closely (you probably can't see it) The porcelin part kinda melted/glazed over.

 

ughhhh, Platinum.... boooooo

 

I know the platnum is bad.. I did say that I have non platnums now.