I'm sick today, and had some time to get back to the engine. My first oil pump, a Fimco Gold series multi-diaphragm pump, was an agricultural pump, and simply wouldn't supply the viscous oil at any amount of pressure. I have a sneaking suspicion that this complete lack of oil pressure led to the death of my last attempt at building a gas turbine. As not to repeat the mistake, I've purchased a gear-type oil scavenging pump, meant to return oil from a low-mounted turbocharger, or to operate a separate oil system for the turbocharger. It's allegedly rated 2.5 GPM at 60 PSI for oil.
That is, of course, for a car. We'll see how it does.
Here's the engine with the new pump all mounted and plumbed up. I've replaced the pump feed line with silicone tubing which is larger than the original aluminum line. This is to avoid an effect called cavitation which would put air-bubbles in the line, depriving the turbocharger of a steady flow of oil.
Till next time, cheers!