Dude~, Actually I said 1:1 (i.e. one-to-one) at cruise rpm and my only source of this information was the man (owner) trying to hire me the aircraft. It would be even better if it registered 1:1 at MAX rpm. Perhaps I was mis-informed.
It could even be that its all a bit variable from aircraft to aircraft.
Where are you Ghengis - can you help on this one?