Time to dial it in, high slip %
#21
Registered
28's are too big. My Black Thunder has gone 78gps at 5300 with 26 Bravo 1's. I'm making 650hp+ so I wouldn't expect your boat to match but there is a lot of room for more speed with lower slip numbers. Cutting Edge Props advertises a larger dia. 4 blade prop for high x boats. Or try a 5 blade. Your higher x dim. will soften the blow to your outdrive.