I think I got a bad one. mine did 12 starts had prob big blue flames out of the rear.. changed ecu had another 6 good starts then same problem which started at 114,000 revs. Took it to the person who does the warranty for wren here ran it on his test bed same thing. Before sending engine back to wren we elimiated the ecu by replacing it with another tried engine same thing. Next we tried another fuel pump {new one} same thing. Next tried another turbine wren ss with my ecu and my pump It ran beautiful . So that way we elimated the ecu and pump so the turbine was at fault. The temp got up to about 1,000 degrees on the display. Now sent back turbine to wren in the first week of december 07 and still waiting for reply for what is wrong with this turbine and still waiting on return date