Topgun non step props?
 

looking for prop suggestions:

1999 topgun kevlar hull
no step
notched transom
555ci motors NA, according to dyno sheets:
748hp at 6100 Rpms
peak torque is 652 ft/lbat 5700 but starting at 4100 it’s 630ft/lb
bravo xr drives max machine internals 1.5 ratio

I read a post here from long ago of similar boat running 30p

Im running Stock bravo 28s and can’t get them much over 5000rpm

not looking to set any speed records but want to get the most out of my setup.

I ran those props on a 93 TG with 500 EFI's and spun them 5100 ...how deep are the drives

Gonna have to measure them buy they’re standard Xr lowers w nosecones

I almost think I need to go down to 26s to get some more Rpms out, but seeing the other posts has me confused.

Should I be running smaller props faster or bigger props slower?

were you at the dyno sessions , you sure their making 750 hp.....what speed are you running

Something is not right for sure and I doubt its the props. You should be able spin the 28's much higher than 5000rpms with 750hp a side. The dyno numbers you said show plenty of torque above 4100 rpms, so its not like you have a lack of torque and need to spin them up to get over an rpm hump.
What GPS speeds are you seeing at WOT???

Best so far is 72 on gps

I was not at the dyno sessions, I just have the reports from when these motors were built by previous owner.

The motors aren’t making 750. They’re making 550 at best.

i was going to say my warmed-up hawk 525's that we estimate are doing 550-575hp had me @ 72 mph top speed.

That would explain why something not adding up ...the dyno sheet shows 598 at 5000rpm

i just can’t get past that with these props