RE: Top Flite Giant P-47 Build
You can adjust the throttle cure in the transmitter, if it's a newer computer radio.
What I have seen over 30 years of flying is that the you reach better than 90% power when you are just above 1/2 throttle, The trick is to adjust the throttle curve so that when you advance the throttle the engine respones through out the entire stick travel. This takes some adjusting and time to get right. Be careful doing so though.
Ron