Piston tolerance?

[powershift]

I'm not an expert, but that damage doesn't look like it came from bad timing unless the timing issue was dropping a socket into the cylinder and putting the head on after a 12 pack and a doobie. A machine shop or engine builder might have some better ideas. Maybe it is piston slap? I'm planning on a Tapa engine out of So Cal when my 5.0 V8 blows.

 

[sdtim]

There is only damage in one cylinder...the piston and sleeve are melted...the machine shop/engine builder said it was detonation.

The supercharger is fine. Had there been a catastrophic failure with the supercharger I can't imagine debris wouldn't have made its way into other cylinders. There was no evidence of any foreign object entering the engine (checked the oil pan, heads, etc.).

 

[powershift]

Detonation is bad. I'd be checking your knock sensors to make sure they work fine and then do some WOT runs with the new sleeves and do some data logging. I just bought the GAP tool for my 5.0L V8 engine, but it probably doesn't do data logging. I don't remember seeing that feature. I'd record knock retar4d timing advance and a few others but only at WOT.

 

[greiswig]

Are you implying that this wouldn't happen? Please elaborate if you believe it was caused by something else. I'd love to hear other possibilities.

i’m just saying that a timing issue that causes detonation ordinarily would affect all cylinders. I’m not sure what might cause what we are seeing here, but I would check that injector to see what the spray pattern looks like. i’m not sure that could cause this issue either, but I have seen diesel engines where a strange spray pattern caused burning in one part of the cylinder.