In round terms you can determine the fuel consumption by multiplying the specific fuel consumption by the power you use. 0.4lbs to 0.45 per hour is about the average consumption for a lycon, with all the gadgets (GAMI, LASAR etc) added you might get 0.38 or so.
Sometimes an interesting thing to do as 'good consumption' is often at lower than book crusie speeds and great speed usually brings along very high consumption. Anything much over 75% usually means a lot of 'fuel cooling' is going on.
On antiques like the Gypsy the 'sweet spot' is the highest throttle opening before the 'power valve' in the carburetter opens, with a Lycon it is usually CHT or EHT driven.
Last edited by gasax; 15th Jun 2007 at 10:32.