F8 is leaner than F7.As for empirically giving more power, depends on several other variables including your hardware and state of tune.
And could run B9 with an intercooler(due to heatsoak), currently on B8.
Quote from: E30Dom on July 02, 2012, 01:03:16 pm And could run B9 with an intercooler(due to heatsoak), currently on B8.Can I assume you meant couldn't?