B58 is completely different engine with different oil pan and oil pump. This system looks much better on the schematics (
http://www.realoem.com/bmw/enUS/show...diagId=11_6357) then N55, but it is still a road car that not designed for extreme track use. I would stay away from R Compound tires. I think for autocross courses both cars should be ok. Just keep oil level at maximum