This is what is stamped on the engine plate of my Lyc 360
160/165/170/180 HP at 2400/2500/2600/2700 RPM
The factory spec for my model lists take off distance of 300ft (at 2700rpm)with the CSP and 550ft (at 2500rpm) for the FP both on a Lycoming 360 C4F.
So a rough extrapolation would lead me to believe that if I can get an extra 100rpm static out of my FP (which PowerFlow say that it can do)which would increase my current 2500rpm static up to 2600rpm that should knock off at least 100 feet on TO distance which is huge for the type of flying I do and gets me pretty close to the CSP numbers without the added maintenance expense and weight.
If it pans out that way, I,d be a happy camper.
Edited to add, I understand the HP v RPM output calcs are not linear but I don't think my expectations are out of whack