Why would you voluntarily buy and attempt to fly a Gee Bee. People were killed in those things. Just kidding (sort of)

The only thing I can think of is that you have severe left yaw induced by engine torque. When you add left rudder, it's just too much for the stubby tail. Trimming your ailerons can mask the effect of torque induced yaw. You can check it by flying straight up. If it yaws left, and gets worse as you slow, you probably need to add some right engine thrust angle. You can also get a clue when taking off. If you have to hold hard right rudder, like I did on my GP Extra, during take-off, this may also indicate right thrust needed.

Also check your C.G. An aft C.G. can lead to abrupt stalling.

Good luck.