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"BOUGHT NOT BUILT"
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Discussion Starter #1 (Edited)
what is the decideing factor???

what happens when you go to 5 blade??

more bow lift??? transom lift???

do you loose top end???

do you go pitch for pitch???

do they take more hp??
 

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5,180 Posts
I guess they had all your answers. I have one of the old ones from when Ron had a partner in another shop. I got a new 5 blade coming as well.
 

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"BOUGHT NOT BUILT"
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8,077 Posts
Discussion Starter #5
I guess they had all your answers. I have one of the old ones from when Ron had a partner in another shop. I got a new 5 blade coming as well.
nope...Ron told me himself that they do everthing better....

so I'm changing all my props
 

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"BOUGHT NOT BUILT"
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8,077 Posts
Discussion Starter #7
What is everything they do better? I have always wondered and been interested in trying a 5 blade.
the everything I'm think'n...

get on plane quicker..

stay on plane at slower speed..

run a faster speed at 3000 rpm..

accerate quicker...

have a better slip number

and go faster top end...

when I get the props on I'll let you guys know...


anyone that has already changed to 5 blades??????
 

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Premium Member
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729 Posts
Steve!

I have tried both on my deck boat and I prefer the 5 blade. I currently run a Maximus 28 and I have tried Bravo 28's and 30's. The 5 blade accelerates much faster. No doubt there is more stress on the drive but knock on fiberglass.... all is good so far. I would like to try a p5x hydromotive because I heard it is a bow lifting prop. There are adjustments that can be made to the props such as cutting down the diffuser rings to reduce stern lift thereby increasing bow lift to assist in "airing out" a hull. I like the 5 blade so much more than the 4 blades that I am willing to risk the drive explosion everyone has warned me about. My decision was made based on reading countless entries on OSO. Alot of the offshore guys run 5 blades with no problems with XR's. Let us know the results!
 

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"BOUGHT NOT BUILT"
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8,077 Posts
Discussion Starter #9
Steve!

I have tried both on my deck boat and I prefer the 5 blade. I currently run a Maximus 28 and I have tried Bravo 28's and 30's. The 5 blade accelerates much faster. No doubt there is more stress on the drive but knock on fiberglass.... all is good so far. I would like to try a p5x hydromotive because I heard it is a bow lifting prop. There are adjustments that can be made to the props such as cutting down the diffuser rings to reduce stern lift thereby increasing bow lift to assist in "airing out" a hull. I like the 5 blade so much more than the 4 blades that I am willing to risk the drive explosion everyone has warned me about. My decision was made based on reading countless entries on OSO. Alot of the offshore guys run 5 blades with no problems with XR's. Let us know the results!
the stories I was hearing reminded me of when they started going from
3 to 4 blades....
 

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1,043 Posts
I run a 26p p5x on a 28 Nordic Heat with a Whipple 496ho and a xr drive at 5400 rpm. The prop works very well on the boat and does give very good bow lift. I like the Hydro's better than the Max's just because of the 15" dim compare to the 15 5/8" on the Max. Yet I have never tryed the Max prop. I tryed the Hydro frist and it was so perfect right out of the box that I never went any further. BTW I have a 12.5 to 13% slip that also helps keep the xr alive. (a 28p 4 blade bravo spins close to the same rpm at almost 20% slip)The Nordic's have high than most X dim. Just my 2 cents
 

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"BOUGHT NOT BUILT"
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Discussion Starter #12
I run a 26p p5x on a 28 Nordic Heat with a Whipple 496ho and a xr drive at 5400 rpm. The prop works very well on the boat and does give very good bow lift. I like the Hydro's better than the Max's just because of the 15" dim compare to the 15 5/8" on the Max. Yet I have never tryed the Max prop. I tryed the Hydro frist and it was so perfect right out of the box that I never went any further. BTW I have a 12.5 to 13% slip that also helps keep the xr alive. (a 28p 4 blade bravo spins close to the same rpm at almost 20% slip)The Nordic's have high than most X dim. Just my 2 cents
77 mph?
 

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Yea right there the best numbers I have seen is 78.3. But this has only been done a half a dozen times. It was a light load early in the spring and not everyday real world boating. The boat runs 75 all day long in the heat with fuel and 4 to 5 people at 1500+ feet. But I added Lighting Headers this winter so we will have to see what it will do this year??? I really hope to break the 80 mark????
 

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"BOUGHT NOT BUILT"
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8,077 Posts
Discussion Starter #16
2Force: if you ran 70 at 4500 with a 5, what were your numbers with the 4 blade (& pitch)?
ran 75 with a 14'' 27 four blade and 75 with a 26 15'' all at 5000 rpms.....

ron says the 5 blades are getting tooo much bite... he has them now pulling some of the teeth
 

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Ultra 27 Shadow
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1,870 Posts
does anyone have a 24 5-blade? I would like to try one. it has to be left hand drive also
You may have a hard time finding a LH rotation to test, but if you do find a RH you still can at least test. Forward will be reverse and reverse will be forward. Not going to hurt anything. All assuming you are running a single.

Mike
 

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Floatin dirty
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4,831 Posts
ran 75 with a 14'' 27 four blade and 75 with a 26 15'' all at 5000 rpms.....

ron says the 5 blades are getting tooo much bite... he has them now pulling some of the teeth

You just need a little diameter taken out of your 5 blade to get your RPM's up. I had my Maximus taken from 15 5/8 down to 15". I did it in increments of 15.5 then 15.25 then 15" and I picked up 600 RPM at the end. I am going to have 5/8 cut off the diffuser ring to get 100 more RPM and reduce the stern lift some.
 

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You may have a hard time finding a LH rotation to test, but if you do find a RH you still can at least test. Forward will be reverse and reverse will be forward. Not going to hurt anything. All assuming you are running a single.

Mike
Yeah I am with ya. I wonder how a 5 blade would work on a V-hull
 
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