hi, wath do you think about puting a oil radiator in the compressor oil line? like engine head oil exit to radiator, radiator to compressor.
In theory should provide colder oil at lower pressure, may even help with engine oil pressure fluctuations. I've no idea how this would affect the oil flow to the charger though. Perhaps consider a stand alone oil supply with it's own oil cooler, a topic on this has just been started.