Classic, prop, rpm, speed issues

[CK11]

I tried a 22P Fury 3 for the first time today on my 2020 Classic. 6000rpm and 71 mph. Jackplate was about 1/2″ above flush, which according to my measurments is 3.5″ PTP. I’m not at elevation though and have never run at elevation before. I do have to be going about 54 mph to get air under the hull to lift fully on pad.

My main prop is a 25 Bravo 1FS. It runs about 5850 rpm and around 66-68 mph. I can stay on pad in the 40’s mph range which is where I cruise a lot on small lakes. Seems to be more efficient too since more boat is out of the water with less rpms than the Fury at the same speed. I’m curious about a 23 or 24 pitch Bravo.

 

Not sure if this helps, it’s just what I’ve observed.

[Wheelman]

Fury from my experience just doesn’t have a lot of natural lift, it’s great when the boat is light and the DA is low though the Tempest has much better lift as a 3-blade. I’d recommend trying it in 1” pitch higher than the Fury that works well for your set up to be at the same rpms/speed.

[zethkinnettfishing]

Wheelman:

Fury from my experience just doesn’t have a lot of natural lift, it’s great when the boat is light and the DA is low though the Tempest has much better lift as a 3-blade. I’d recommend trying it in 1” pitch higher than the Fury that works well for your set up to be at the same rpms/speed.

I had a tempest. 24. It was worse for me. Ran great at 0′ but when I get to 1000′ it wouldn’t lift at all. It would just make me plow at 50mph

[CB_SabreFTD18]

Check the thread below about Barrijg and his numbers with a 23 Trophy on his new P2…”Propping a P2 with 200 Merc 4 stroke.”  He’s getting way up there in the rpms with good speed.  No idea if that’s a small barrel Trophy with exhaust ring or what plug configuration, but it might be worth trying.  Trophy props are known to give bow lift.  I tried one on my Sabre, and the bow lift was way up there.

[Wheelman]

zethkinnettfishing:

Wheelman:

Fury from my experience just doesn’t have a lot of natural lift, it’s great when the boat is light and the DA is low though the Tempest has much better lift as a 3-blade. I’d recommend trying it in 1” pitch higher than the Fury that works well for your set up to be at the same rpms/speed.

I had a tempest. 24. It was worse for me. Ran great at 0′ but when I get to 1000′ it wouldn’t lift at all. It would just make me plow at 50mph

Interesting as 1k’ change in DA is ~10* temperature, so that doesn’t make a lot of sense. I’ve never had issues with plowing on the Tempest or Trophy, only the Fury when hot(high DA)/loaded down.

[Wheelman]

CB_SabreFTD18:

Check the thread below about Barrijg and his numbers with a 23 Trophy on his new P2…”Propping a P2 with 200 Merc 4 stroke.”  He’s getting way up there in the rpms with good speed.  No idea if that’s a small barrel Trophy with exhaust ring or what plug configuration, but it might be worth trying.  Trophy props are known to give bow lift.  I tried one on my Sabre, and the bow lift was way up there.

I like the small hub Trophy as well on my Sabre with 150 4-stroke and exhaust ring, has lots of stern lift to me atleast compared to the Fury.

[zethkinnettfishing]

I am going to try a 23 4XL and go from there.

[PMantle]

zethkinnettfishing:

 

0’ elevation

21 Xroxton 4XL only tried once so far

5920 rpm just shy of 6000 goal

however only 61mph!

do I change manual jackplate height? Anyone got a good starting point for jackplate height?

That’s only 9% slip, so not too bad. That’s about where I am with my 22P Razor 4XL. It will probably be for sale when the new boat comes in.

 

[screamn1550]

What you are getting with the 23 Fury is what you should be getting. That is what I am getting on mine, but I have a hydraulic plate so I can tweak it here and there for maybe 1-2 mph more depending on the conditions but there is nothing wrong with north of 70 mph with this setup.  If you go less pitch I was told from Bass Cat that you are not going to be happy or will it buy you much. My boat does not get on pad until I hit 50 mph’ish…and that is what I was told from BC is normal. Welcome to the world of the 4-stroke motor.

[catdude28]

My 2019 Classic came from the factory with a 24 Fury 3.  Solo, 1/2 tank of gas,  manual plate, and one Talon, I get around 5700-5750 rpm with a speed of about 72 mph under the right conditions and cool water. Lift does not start until high 40’s mph. I have no desire to drop down in pitch to chase a couple of hundred more rpm’s as I am quite satisfied with this performance. Most of my run time is cruising around 50 mph.

[Wheelman]

catdude28:

My 2019 Classic came from the factory with a 24 Fury 3.  Solo, 1/2 tank of gas,  manual plate, and one Talon, I get around 5700-5750 rpm with a speed of about 72 mph under the right conditions and cool water. Lift does not start until high 40’s mph. I have no desire to drop down in pitch to chase a couple of hundred more rpm’s as I am quite satisfied with this performance. Most of my run time is cruising around 50 mph.

Keep in mind if that rpm is in the winter then it’ll be lower in the summer when the DA is higher. The benefit of dropping a pitch to get the rpms up a little higher is to have a slightly better hole shot, as I don’t think you’ll increase top end being the 200 is a detuned 300 with a smaller throttle body acting as a restrictor.

[Author]

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