I just got my setup running for the first time,

stock b16
type r manifold
ramhorn
sc34 @9 psi
3 inch open downpipe
mail order tune from phearable (worked once before....)

and I've only really taken it out once, highway driving its 14.3 to 1, in boost its about 12.0-12.5 to 1. From what I understand this is a little lean.. Anyways, I haven't seen this before, and my guess is its either detonation or its too lean.

To me the tip is a little lighter than it should be, and there is a tiny section on the top that is dark, maybe three quarters of a mm in diameter, like the white part chipped off.

Chipped off may be too strong of a word, the spark plug itself doesn't look chipped, just the whiteness of it... if that makes any sence.



sorry for the horrible pic, my friend wanted to borrow my camera and then decided to leave the state without giving it back...

 

cant really analyze anything from that, why even bother with a picture like this?

I can say your garden tiling could use a wash and better get that rake to get rid of those leaves and maybe some grass would be nice where the stones end.

 

LOL

 

Heh, good one i suppose... I don't care about the lawn obviously. I'll try and borrow a camera this evening. I can't help that my friends are inconsiderate

 

what type plug you runnin?
maybe try a little colder plug cuse that black spot on plug tip

 

Did you just idle your car then take these out? You need new plugs, run at wot, then shut the car off immediately. Pull the plugs then be looking at the porcelain and deep down inside.

Posting a pic of the top of the plug from an idle isn't really gonna say much. We'll be able to see how well you've targeted the needed heat range, and see some idle fuel but that's about it.