Takeoff power fuel flow

[Andy]

I've been crunching some takeoff performance data and am surprised by the fuel flow of my FX-3. Most takeoffs, including the first factory test flight at Yakima, show peak fuel flow greater that 17 gallons/hour. All the takeoffs have been at higher density altitude than sea level and maximum power, as computed by G3X, is typically 90% or less.

Lycoming IO-360 data show a fuel flow of 89.3 pound/hours (14.9 gallons/hour) at maximum power mixture and 180 hp. At 90% power and max power mixture the fuel flow is 82 pound/hour (13.7 gallons/hour).

I have data for another FX-3 and its fuel flow at takeoff power is about 13 gallons/hour which seems to match the Lycoming fuel flow data.

Why would my almost new FX-3 have such high fuel flow at takeoff power? Is it normal to have to adjust the fuel injection after taking delivery of an FX-3?