Turbo grief!

[Richard]

2 years of sweat, rebuild everything but.... that rear wastegate.

On the third flight I lost boost and went to 27" at 2000 feet. First thought... stuck open wastegate. Landed. Nope it moves freely. Spun the new turbo... yep spins nice. Check oil pressure to the waste gate...... good as it gets... no exhaust leaks.... no induction leaks that I can see....

question: The wastegate is original 3000hrs. It was adjusted, but looked pretty worn. It that the most likely failure point? Have you ever heard of one going bad? Where else can I look? How big of an induction leak would be needed to loose that much pressure? How big of an exhaust leak would be needed to cause zero boost?

I also capped off the return line to the wastegate so that off idle I would have fully closed the wastegate. Started the engine and nope 28" is all I can get out of it. Assuming that the exhaust and induction are in good shape, is the turbo and wastegate the only places to look? If the turbo spins freely and smooth, would that rule out the turbo?

Thanks

Richard

P.S. Performance is AWESOME!!!!!

2400 rpm, 22" clean, at sea level, gave me 150-160mph. Can't remember if that was good, but sure felt fast.