Not to be sarcastic here, I have an Alpha, and the Arrow ( semi-semetrical wing version) but-
To make the Alpha faster- put the engine in another plane.
Putting a high pitched prop on this plane is going to load down the engine more than make the plane go fast.- It's a TRAINER.
If you "scream the engine" it's just not going to go a lot faster-to draggy.
Yes removing the baffle, flywheel ect., will make it louder/rev higher, ect. but find a nice clean design to put that engine in when you are ready.

Jetts