Have the fuel flow adjustments you mentioned in another thread been implemented in the current version?
"A more precise adjustment will make the next release version, but for now if anybody wants the additional range and you're confident editing text files, open the Engines.cfg and scroll down to the jet_density_on_ff_table. Replace the entire line with the one below, should give you roughly 6500km (4000 mile) range in the 50,000ft zone.
jet_density_on_ff_table = 0.000230:0.229000,0.000600:0.380000,0.000710:0.554000,0.000910:0.761000,0.001020:0.887000,0.001280:0.983000,0.001430:1.074000,0.001770:1.161000,0.002060:1.219100,0.002380:1.39600
Ensure you climb at 250kts/93% rpm to 20,000ft then 300kts/96% rpm until that coincides with 0.8M then maintain the mach number. Top of climb, level out and let speed build to 0.87M and adjust throttles to maintain."