Piper boy
In your case it would be worth buying the engine operating manual from Lycoming. It contains a whole section of power charts which will allow you to build your own RPM vs power for a selection of altitudes. It also contains a wealth of operating tips.
Re your second question the fuel will not be drawn through. As ABC pointed out the power output at full throttle will be effected by the density of the ambient air. Less air means less fuel to maintain a constant fuel air ratio and so less fuel flow and of course a lower power output
Last edited by Big Pistons Forever; 24th October 2012 at 21:04.