New Updated Stats, so I probably need a new answer

[GraAlaMat77]

Last month I posted my boats stats trying to determine what prop to buy. Earlier this weak I blew a head gasket because I had a dimple on the head. The head was resurfaced and a new gasket was put in. The gasket was failing for a while obviously, and now the boats stats are different, so what prop? I have been told the Turbo Lightning 23,24,25 and the Tempest plus 23 and 25, but that was before the fix, so what do you think?

Old Stats

Boat: 1992 Ranger 391V Comanche
Motor: 1992 Yamaha Pro V 200
Prop: Predator - 4 Blades - 25 pitch
RPM @ WOT - 5300
Speed at WOT - 57.5
10" Jackplate
Propshaft is 3.5" below pad
Water guage psi - 15

New Stats

RPM @ WOT - 5600
Speed at WOT - 61.5
Water guage psi - 15

 

[GraAlaMat77]

Re: New Updated Stats, so I probably need a new answer

Also, what I want in terms of a prop is more top end. Thank you for your help.

 

[walleyehed]

Re: New Updated Stats, so I probably need a new answer

I think I'd try a 25P Lightning....it's got a bit more lift than the Tempest, and I think you'll see the RPM come up with the speed.
Does the 391V have a step to the pad?

 

[GraAlaMat77]

Re: New Updated Stats, so I probably need a new answer

im not quite sure what u mean, the pad is not even, there is a drop down sectio where the plug goes in and it comes back up to my livewell holes, its not all one linear surface, there are edges. With the turbo being a three bladed prop, should my rpms come up because im dropping the number of blades while keeping the same pitch?

 

[walleyehed]

Re: New Updated Stats, so I probably need a new answer

Yes, your RPM should come up because we'd be running the same pitch, minus 1 blade, but more-so because of lifting capabilities, as in bow-lift.
The 391V has a pad and step by what you are explaining, and with a 10" plate, you are along ways back, in pretty stable water, so you should be able to get some good heigth even with a 3-bld.
You should be in good shape water pressure-wise, but I'd keep an eye on it with a lightning if running as high as it's capable of.

 

[GraAlaMat77]

Re: New Updated Stats, so I probably need a new answer

Mark over at bassboatcentral said i need to be shooting for 5800-6000 rpms. Can i turn the 25p lightning that fast?