Well i had a quick peek at the turbo from the air intake side. And it spins freely . No oil or dirt presennt and the bearing feel ok. Little if any play. When we assembled the engine first the turbo blew off the hose so it was working then .. I feel i need to get a gauge and check we are getting some boost pressure... also will look to see if i cant get a rev counter. ... under no load the engine does sound like ~4000 rpm to my untraind ear. .. has to be a lack of power and not doing more than 2500rpm. On the road.. lack of turbo would explain a lot or boost fule. A gauge would confirm.