New Donzi owner in Norway, propeller question

[Cummins_12v]

Hello, im a new Donzi 22 classic owner. I have a question about the propeller. In norway i propably have 1/5 22c so its no experts here. Its a 22c from 1992, bravo 1, overhauled chevy 350 with new alu heads camshaft etc, around 400hp. I now got a 4 blade offshore 23p, i can do 62,5 mph at 4800-4900 rpm. Wondering about a 25p 3 blade to get some extra top end speed, any opinions? Also woundering abot size, 14 1/4 or 14 3/4? its a 1" shaft on the bravo one?

[Cummins_12v]

Or what about cleaver props? How do they work?

[Carl C]

Cool to see someone from Norway posting here. I've always been fascinated by your country. The prop gurus will respond soon I expect.

[MOP]

I have a SB 22, it is a 383 with about 375HP I spin a 4B 23 on a good day I turn 65.5@5000. IMO your speed is held back somewhat buy the a low X dimension, most later boats were setup A 15-1/2". I have an 86 that was a Tempest setup with an X of almost 17", props will only get you so far. A shortie may be in your future!

[BUIZILLA]

leave it alone...

[Cummins_12v]

So you dont think i can get it to the upper 60's with a 25p 3 blade?

[Cummins_12v]

Cool to see someone from Norway posting here. I've always been fascinated by your country. The prop gurus will respond soon I expect.

Its a nice country, but not so many experts on motorized things other than small jap cars and yamaha 50hp outboard

[axelkloehn]

low 60s sounds pretty low for 400hp in a 22c, I would give a 25p 3-blade a try. Some here have good experience with the Mirages. Also diameter of 14ish sounds too small. I am running my GT21 around 60mph with stock 350 sbc, Bravo1 and a Mirage 23p blade (14 3/4) at about 4600 rpm, but I have a raised X-dim (almost 1 inch up). May be the 4blade has a lot of slip...

[glashole]

listen to buizilla

[Cummins_12v]

low 60s sounds pretty low for 400hp in a 22c, I would give a 25p 3-blade a try. Some here have good experience with the Mirages. Also diameter of 14ish sounds too small. I am running my GT21 around 60mph with stock 350 sbc, Bravo1 and a Mirage 23p blade (14 3/4) at about 4600 rpm, but I have a raised X-dim (almost 1 inch up). May be the 4blade has a lot of slip...

Which of these props should i buy:
13 x25 5 High five kleever Rep. 4 3/8
13 1/2x25 4 Renegade 175738 4
14 3/4x25 3 Tempest 48 825866A40 4 3/8
14 1/4x25 3 Rapture 33082 4 3/8
14 1/2x25 3 Turbo 4 3/8
14 1/4x26 3 Turbo 4 3/8

Hope that someone knows, i get those used props for 200-250 Usd

[axelkloehn]

...the one with the best result! Here comes the testing time! No one will be able to tell which one will give the best result without testing it on your setup.

[Cummins_12v]

Now the boat are going to be polished, and changed all fluids before øøhitting the water again in the summer again i will ask the prop question, i cant just try and dail, props are 500 usd. Someone over there willing to sell and ship a prop to Norway? 25p mirage plus?

A guy from the other end of the country have some props, can any of these be recomended?



3500 15 1/8x28 3 Solas 110mm

2000 14 3/8x27 3 Mirage Fast nav 48 19836 110mm

3500 14 1/4x26 3 Michigan Wheel 110mm

2500 14 1/4x26 3 Turbo 110mm

2500 14 x26 3 No Name 110mm

2500 14 1/2x25 3 Turbo 110mm

2500 13 1/4x25 3 Shooter 100mm

2500 14 1/2x25 3 Turbo 110mm

2500 13 x25 5 High five kleever 110mm

2500 13 1/2x25 4 Renegade 175738 100mm

2500 14 1/4x25 3 Rapture 33082 110mm

2500 14? X25 3 quicksilver laser 2

3500 16 x24,5 3 Solas 2 stk NY 110mm

2500 14 1/4x24 3 No Name SZK 110mm

2500 14 1/4x24 3 Turbo II 110mm

2500 13 3/4x24 4 Trophy plus 48 825 940 UH 100mm

2500 14 1/2x24 3 Turbo II 110mm

2500 14 1/4x24 3 Turbo 110mm

2500 14 1/2x24 3 Raker 394755 110mm

2500 13 1/2x23 3 Quicksilver 48 16320 110mm

2500 14 1/4x23 3 Quicksilver CLEEVER 110mm

3500 16 x23 3 Solas NY 110mm

3500 14 1/4x23 3 Ballistic 110mm

2500 13 3/4x23 3 Laser II 110mm

2500 14 5/8x23 3 Mirage plus 48 13704A40 110mm

3500 13 1/2x23 3 Vengeance 48 16320 NY 110mm

2500 15 x23 3 No name 110mm

[Pismo]

Trim it more, much more..

[Cummins_12v]

Cant trim more, 62mph are top speed at 5200rpm, more trim, just spinning and loose speed. So i need more pitch

[joseph m. hahnl]

That's 18% slip are you running an aluminum prop? Your four blade should carry the hull better and get less slip then a 3 blade. Who makes the prop you Have?what is the drive ratio? I assumed it was 1:1.5.

23P 5200 RPM with a 1:1.5 @ max> .10% slip would be 68MPH.


Every inch of pitch is 150 to 200 RPM

In theory by going to a 25P you'll loose 400Rpm

25p 4800 RPM with a 1:1.5 @ max>.10% would be 68MPH

Every inch in Diameter is 500 RPM.

so preformance wise the prop you have is slipping excessively for one reason or another. Most marine V8's are governed as not to exceed the torque curve of the cam shaft. That is usally the max target Rpm which is governed by the pitch.