So about this differing outlet shapes...

This is what it looked like before:



Heres what my blower outlet looks like now:

I have less KR with this blower on, same rotors and snout as before though.

No other changes were made.



For the current shape all I did was continue the triangle up a tad bit and down to the bottom. Then a chamfer.

Still matches the curvature of the rotor which seems to be the key to efficiency.