29 with single engine

[freddan]

What speed can I expect from a single 502 or 500HP engine? And how do the single engine hull act compared to a hull with twins?

[tssteph]

454 will run 64 in ideal conditions. I would guess 67-68. Go for twin, I think you will be much happier, easier docking, more reliability, probably less fuel for mph as well.

[2 Trick Rick]

Yep, Thats about right.

454 Mag/385hp (60/62mph)
502 Mag/415HP (63/64mph)
502 Blue/500hp (67/68mph)

I have checked this "Speed Calculator" on a few boats and seems very, very close most the time.

http://www.go-fast.com/boat_speed_predictions.htm