I have never heard of a turbo failing that way. I.E. the turbine

separating from the shaft.

I wonder what the history is of that turbo. Then again I have zero

experience with

turbos. IMHO most of the failed turbo's I have seen due to excess heat

have melted blades.

Francois has many hours on the dyno using that turbo and rates his engine

at 230 HP.

Obviously with a bit of boost.

Paul Lamar

Archie wrote:

Ditto here, Paul
However, at one time was involved in some fixturing for these,
and since the turbine is friction welded to the shaft, I wonder if
the weld was internally defective?
Archie

I am sure it is not a new turbo so it is strange that it failed so soon.
Perhaps the turbo thrust bearing went out... the turbine jammed in the housing
while at high RPM and the rotational inertia of the compressor wheel sheared 
the turbine from the shaft. That is about the only explanation I can come up
with now.

Paul Lamar
 
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