Here's a detailed analysis on weaknesses of the N54/N55 internal oil system, which have lead to engine failures and spun bearings amongst the racing crowd.
The author modified his oil pan similar to the M2 pan after losing an engine to oil starvation. a 3rd party baffled oil pan DID NOT prevent starvation. (Deleted comment about Accusump)
Ultimately BMW fixed the problem in the S55 engine. Fixes include:
- relocation of the oil pickup tube
- addition of a 2nd oil pump
- Better baffling and added chambers to trap oil and minimize oil starvation under high G-forces.
Detailed thread with pictures (use spoon street dot com without spaces)
https://*********************/thread...nstalled.4034/