Absolutely, the M4 GT4/M2 CS Racing both use the same pump + pan setup so it must work well enough under racing conditions.
Love what you are doing here, and agree it is most likely the only way forward. Have you been able to find any S55 oil pressure (MHD) logs done at a track? Should be super easy to log on that platform, and would be interesting to compare with what we have for N55 and my N54.