Stuttering at Spa?

[shimmy]

Originally Posted by AlexGTT

Shim, you are correct and fuel mixture does have a significant effect on engine temps. However, when you look at the extremely high state of tune with the E46 motor, I would expect to see holed pistons and more extreme damage and not just raised temps. Believe me, I've seem less highly tuned motors grenade themselves after just a few seconds of unchecked lean running at 100% throttle at near max rpm.

I wonder if Roland can ask the right man at BmW if slight lean running at 100% throttle on hot days could just raise engine temps enough to push oil temps up.

I believe S54 was designed to run slightly lean at full throttle for emissions