Mine doesn't have that kind of throttle response at all, it's very linear. Mine is installed in a Hangar 9 SuperCub (actually, one I purchased from tailskid), and it's an awesome engine, it flies very scale like at 1/4 throttle, and full throttle is pretty close to vertical. Fuel consumption on mine is ridiculous. I've flown it for 45 minutes on the 20oz tank I have in it, and still had plenty of fuel left. Of course, it's a Cub, so it was all at low throttle, but still impressive. I think it's a great engine, I'd love to have another one.