Another prop question.

[bocco]

My boat is a 97 DCB 24 extreme double step bottom. Carbed 500hp. 1.5 gears 26P bravo 1 prop.

Speed wise I'm currently getting 74mph at 5100 just me and the wife. Add 2 people and it's 72. While that feels pretty fast when driving it I think I should be getting a little more speed considering it's not that big a boat. I was running next to a 29 Velocity with a 496HO this weekend and we were about neck and neck. Much bigger boat than mine.

I have been wondering if my prop has had some work and might be cut down a little. I measured the diameter of the prop yesterday and it's 15 not 15.25. I measured it pretty carefully so I'm wondering if that small diameter change would effect my top end? The Mercruiser slip calculator puts me at 12%.

I'm wondering if I should try an uncut 26P or see if I can swing a 28P.

Opinions?

Thanks

 

[Runs2rch]

Probably start with the box stock 26. 28 is probably going to be too much.

 

[NicPaus]

Is your boat a stepped hull? I run the same with a 496HO also in a 26' but have stepped hull.

 

[Rbcconst]

My boat is a 97 DCB 24 extreme double step bottom. Carbed 500hp. 1.5 gears 26P bravo 1 prop.

Speed wise I'm currently getting 74mph at 5100 just me and the wife. Add 2 people and it's 72. While that feels pretty fast when driving it I think I should be getting a little more speed considering it's not that big a boat. I was running next to a 29 Velocity with a 496HO this weekend and we were about neck and neck. Much bigger boat than mine.

I have been wondering if my prop has had some work and might be cut down a little. I measured the diameter of the prop yesterday and it's 15 not 15.25. I measured it pretty carefully so I'm wondering if that small diameter change would effect my top end? The Mercruiser slip calculator puts me at 12%.

I'm wondering if I should try an uncut 26P or see if I can swing a 28P.

Opinions?

Thanks

If your up around park Moabi the 30th-7th I have a bone stock 26 you could try.


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[bocco]

If your up around park Moabi the 30th-7th I have a bone stock 26 you could try.


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Thank You but I'm actually in Norcal. Mostly run the Delta.

Is your boat a stepped hull? I run the same with a 496HO also in a 26' but have stepped hull.

Yes it's the double step.

 

[NicPaus]

I would think a 28 would work with 500 HP.

 

[Gopher711]

My 24E runs 70-72 on a good day with a 26p and stock 496mag
You are probably putting out more hp than i am so you might try the 28 ?


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[bocco]

My 24E runs 70-72 on a good day with a 26p and stock 496mag
You are probably putting out more hp than i am so you might try the 28 ?


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1.50 gears in the outdrive?

 

[boatnam2]

I got a 28x15 maximus if you want to give it a try.

 

[BDMar]

It would help to know the rpm's you're turning and what the optimum rpm range is for your engine. Assuming you are at the proper rpm's, I would bet a 28 Lab Bravo 1 would get you what you're looking for. Not a molested 28...... but one from Mercury racing that hasn't been touched.

 

[Runs2rch]

It would help to know the rpm's you're turning and what the optimum rpm range is for your engine. Assuming you are at the proper rpm's, I would bet a 28 Lab Bravo 1 would get you what you're looking for. Not a molested 28...... but one from Mercury racing that hasn't been touched.

Awesome to see you posting Brian. Wealth of knowledge. How are you doing? The Move go as planned?

 

[BDMar]

Awesome to see you posting Brian. Wealth of knowledge. How are you doing? The Move go as planned?

Thank you! In the process. Started a 4 month post op chemo schedule yesterday. Need to see how I feel with that. The plan is to slowly start moving and organizing. First trip is planned for Sunday.

 

[boatnam2]

I got a maximus 28p x 15 which i heard was great on a smaller vee, i went with a mercury max. Your welcome to try it anytime.