Engine lasted 10 minutes on the dyno last week, then started to have a bad misfire at 2500rpm and load. So the head have to come for a re-check
Spoke to the Engine builder today and its pretty clear whats happened
The head was coked up, one of the down sides of direct injection, so the valves were sticking.
An expensive lesson, yet again, but asked them to strip the engine, check and rebuild. They found a few minor issues and have mentioned that it may be worthwhile porting the head..........it never ends
Should be a couple of weeks to get it put back together