what would the speed of a 29' fever with an hp500 be. Also I'm thinking of going with a procharger so what speed would be seen

If the 525 motors hit 75 (on an average) then you can pretty much back it off from there. Procharger, figure 20 hp per m.p.h. How much will the Procharger add? Would depend on boost. 5% increase in h.p. per pound of boost is an average figure to use (like the 20 h.p. = 1 m.p.h. increase).

Had a guy at my marina with stock 500efi. Ran 68 and 70 gps on a good day.

Should run 73ish with the right prop.

Low 70's is pretty average but I've seen 74 on GPS in the salt with my buddy and I and light on fuel

29' fever with 525 efi stock 26p bravo, I run 80 with good water.