MoTec offers a course on how to tune their systems. A wise investment if you've already spent $4500+ on the hardware. The AFRs are all over the map here, they better understand how to program the system before they hurt something.I last posted that they were getting ready for the first full power run up. It didn't go as well as planned. They could only get about 4300 rpm, not near the power they were hoping for. Also found out the engine is not turbo compounded, What I thought was the turbo was a strange looking water pump. Anyway below is cut and pasted from the most recent news on the engine:
The 1.25" hole in the exhaust is a poor mans waste gate to make sure they don't over boost the engine.
attached below is a screen cap of the engine data monitor.
View attachment 52485
Anyway, you don't need the wastegate connected to the ECU, just connect the lower chamber to the intake manifold. Not sure why they're running it like this with a 1.25 inch hole, they'll learn nothing. The WG could be way too small or the turbine housing way too tight for the application. This is what happens when you really don't know what you're doing- you'll learn the hard, slow way and probably break some stuff. Seen way too many turbo projects end in failure when people have no experience in the field. #1 thing to do is the get the WG working properly.
I wouldn't draw too many conclusions about cooling capacity either until they can run the engine at full power for at least 5 minutes.
Early days, I'm sure they'll start to figure things out as time goes on. As I mentioned before, the FP prop will be a real liability for this application and mission.