It went... tediously and stressfully. I had never dyno'd an engine before; the shop had never run such a small engine; the mounting and driveline hardware that I had prepared beforehand needed rework (different dyno 'cart" than the one I had measured); the dyno computer and my crank sensor weren't "happy"; zoomies had to be modified to connect to the cell's vent duct; etc.; etc. On the first startup in the dyno cell I forgot hearing protection and was literally deaf for the next 24 hours. Adding to the stress was the hour and a half commuting to the shop each of four days, plus the cost- $85/hour/man, usually two guys working with me.
Positives: engine is still in one "lump"; dyno data for pressures (bottom end oil, top end oil, fuel) and coolant temperature were fine.
Negatives: first attempted full-throttle "sweep" (3,000-7,000 RPM, 600 RPM/sec) ended quickly (about 3.5 seconds in, 4,430 RPM) with a bang (not severe enough to blow the burst panel).
The manifold pressure data clearly identifies the culprit. My guess at blower drive ratio (80% of crank speed) was totally "out of the park". This billet 14-71 is
WAY more efficient than I knew. I was shooting for no more than 30 PSI of boost at around 9,000 RPM; the dyno recorded 25 PSI boost at 4,300 RPM!
Since the fuel setup was configured for a slower rise in boost, the mixture was going rapidly lean.
A quick engine check showed compression low on two cylinders, so I need to pull the head and hope it's repairable.