Props for 36' Sports Cruiser/ 360
I am running 22"x24" props on my 1973 36' and I did a search and found that it appears i should be running 20"x20"??? Is this true? Am i running props TOO LARGE for my boat? this is potentially a 2" difference in diameter!??? It might explain why my boat struggles to get over 4000 rpms and doesn't seem to get out of its own way - the fastest I've achieved is 18 knots. These numbers seem WAY out of reach for me, and maybe its because i'm running the wrong props?
Factory Configurations:
Twin 454 Crusaders (350 HP) — 1.5:1 Velvet Drive→ 20" × 20" 3-blade bronze (Michigan Wheel Dyna-Jet)
Twin 427 Chris-Craft (300 HP) — 1.5:1→ 20" × 19" 3-blade bronze
Optional 6-71N Detroits (310 HP) — 1.97:1 Allison→ 22" × 22" 3-blade bronze
Typical Performance (member reports):
Cruise: ~22–24 knots @ 3200 RPM (454s)
WOT: ~28–30 knots @ 4400 RPM
Hey Whitney, my 1972 36' Sports Cruiser was repowered in 2005 with small block Mercruiser's and ZF 63A-25 transmission (2.5:1) with the same HP as the factory 427's. I'm currently running 3 bladed 22D X 20P wheels on my boat with no issues achieving correct WOT RPMs.