want to replace a Tower 75 with a G90 in my WM Mustang. Would I gain any speed? If so, what prop should I use?

Need to know which mustang fro WM and I can help since i probably did it at one time

It is the yellow 40 size ARF. About five or six years old.

Her is a shot of one that no longer exists from a bad battery about 3 years ago. It is the WM 40 that I recovered with a G90 and a 12/8 apc prop. I felt that was the best prop for speed on it. Make sure you beef up the firewall inside and out. Beef up the retract mounts on the inside by slooping epoxy in their to the corners. I installed a larger tank. Get the cg right on and also do a lateral balance. I flew that thing for a couple years. it was dead on. i have a couple with Saito 100 and 61fx.

I'm curious as to what kind and size prop are you using on the tower 75

I'm running a 11/8 APC. It seems to be the fastest so far. I also replaced the stock canopy with one off of a Ultra Sport that was cut down some. That made a big difference. Also installed retractable tail wheel. It is pretty fast as is, but it is time for a little more speed. it will be a job swapping motors I think. Just wanted some opinions on how much improvement I would get. I think it will spin the 11/8 about 12,500 on the ground. It seems to unload good in the air.

Steve Hixson