can someone explain how this happened?

 

i take it noone noticed the ring on top ring. i dont have any of those parts anymore, i was gonna encase that piston, but it got scrapped

 

Its kinda wore in that area of the burn through, the melted tops indicate some detonation, prolly a combination of that and too close of a ring end gap, I'm guessing it was stock gap for a N/A motor that u either boosted or ran nitrous through without retarding the timing.

EDIT:

yeah what is this piston out of?

 

bone stock toyota 22r, a la 1988 2wd, base of base.

 

so what did you do to it??

 

i bought it from a farmer like that. 363,421.9 on the clock. i still have the speedo saved


jago i saw that you moved this. why? because of ringland carnage on a stocker than stock motor?