I have the H9 P-47 with the Zenoah G-20ei and it flys great, its just a little on the slow side.
I am learning more and more about the hobby, and experimenting along the way, and was looking for some advice to get this plane going fatser.
It turns about 8700-9250 rpm with props from 14/10 to 15/6 with the G-20ei.
I was thinking of installing a different motor.
I compared the weights from some other motors and this is what I was thinking of trying and was hoping I might get some insight and feedback.
Also, I will be beefing up the firewall and adding some support inside the fuselage by the firewall as well.
Heres the motors (maybe these are way too much motor, but like I said, I am learning)

Zenoah G-20ei wt. 41.6oz
Saito FA1804 stroke nitro wt. 31 oz
Saito FA 220 4 stroke nitro wt. 38.50 oz
OS160 FX 2 stroke nitro wt. 32.6 oz
OS FS 200 4 stroke nitro wt. 30 oz
DLE 30 wt. 38 oz
YS 170 DZ wt. 35 oz
Evolution 26 GT gas wt. 33 oz

I was comparing motors from Chief Aircraft and got the info on the motors there.
With the bigger motors I figure I will need a prop with a higher pitch for speed and also because 16" is about as big as I can run.
Where can I get a prop with a higher pitch so I dont over rev the engine (or maybe use a throttle stop to control the rpm if neccesary)
Thanks guys,