Mine doesn't cap at 15 with the Pred ltd. on my FS7 like some of you guys have reported. It'll easily hit 20 in ramp 20 with eyes on.
With eyes off, ramp 30, it sounds like 30. Seriously, the indoor field owner thought somebody was running a gas powered motor.
In semi, I'm not so fast, but I can send short bursts of 15 pretty easily.
I sure go through a lot more paint since moving up from a gen 2 with NoX.