External links now open in a new browser tab - turn this off in your UCP - Read more here.

Plugs showing detonation

Discussion pertaining to positive pressure E28s.
Post Reply
turbodan
Posts: 9246
Joined: Jan 09, 2007 10:19 PM

Plugs showing detonation

Post by turbodan »

I replaced the little bastards this afternoon, and all six showed the slight peppering I'm familiar with as a sign of detonation. Not black specks, but lighter colored ones. They're a lot like little bread crumbs, mostly on one side of the plug. I know the engine has detonated with the plugs in there, but I'm not sure if these guys came off of the tops of the pistons of if they're from something else entirely like fuel additives. I also havent heard it detonate since it was at the dragstrip, so I would be somewhat concerned if it has been pinging enough to burn up pistons without me being able to hear it.

Would the plugs still show specks from detonation that happened like two weeks ago? Or do the little brown specks have anything to do with detonation at all?
Post Reply