Burning oil
It's possible it detonated, I don't remember noticing but I also I had the cutouts open to show off to all the Miata's that were there, so it was a little hard to hear.
I was looking at the piston that blew apart last fall and saw this:
The top had pushed down into the ring groove. I guess if it did detonate pretty bad it could've pinched a ring and possibly damaged the bore or something...
It's possible it detonated, I don't remember noticing but I also I had the cutouts open to show off to all the Miata's that were there, so it was a little hard to hear.
I was looking at the piston that blew apart last fall and saw this:
The top had pushed down into the ring groove. I guess if it did detonate pretty bad it could've pinched a ring and possibly damaged the bore or something...