Originally Posted By 69cornetr/t
This for everyone who wanted to know.
Talked to my machinist, who's also a drag racer take a piston out look at it and ,"if it's not black death don't worry about it" which is the skirt gaulding the cylinder wall leaving black lines on the piston skirt.clean the cylinder wall with WD40
So I'm good to go.



If they are only black on the back side i.e. the non thrust side that's from running a plug that's too hot. I've seen it many times. Back siding is usually the wrong plug.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston