Hmmm nice...
VW TDI is a good choice for a heli powerplant, since it is reasonably high revving so relatively light. I wonder if they have retuned it for fixed RPM operation. If lag is no problem turbo could have been pushed up, and cam may be altered, so max torque is on max RPM. Also emissions will not be such a consideration so they may run it closer to stoichiometric before the fuel limiter cuts in. All go to bettering that 170BHP figure, without seriously affecting engine life (since combustion pressure balances piston inertia - high torque at low RPM is worse case).
Mart
Last edited by Graviman; 28th Apr 2014 at 17:30.
Reason: BMW diesel is not related to Steyr M16.