> > On May 29, 2009, at 3:46 PM, tyler wrote: > > > > This is only true on a gasoline engine which risks > > pre-detonation. A turbo diesel simply has reduced power when > > it runs lean under boost, but usually lower rather than > > higher EGTs.
> Mathieu J. Cama wrote: > > Then please explain the four MB diesel that I directly know of > with melted pistons from an excessive lean condition. Lean = > hot, turbo or not! Detonation is more the cracked piston route > which can be acerbated by a lean condition. I'm not talking > lean as in only a few % off from spec, here. Hmm. I'm pretty sure my stock OM617A has a tired ALDA spring, so it _always_ runs lean. Set right, the only time it would not run lean is an max power - like 4k RPM steady climbing a hill. Do I need to worry about melted pistons? -- Philip _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
