Chinewalking
12-12-2010 | 07:54 PM
#21
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Joined: Feb 2001
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From: charlotte nc.
Pipe down pipe head...
4 & 5 blades on a 22 footer?
Oscillations start because it is falling off the pad. Big words make it look like I know what I am talking about, don't hurt yourself! Anyway, great hull- just have to let it do what it is designed to do and then push the boat forward. Less blades, less drag. Less diameter, more pitch and prop torque is a bonus. Higher rake will bring the slip down and 70MPH here we come!
4 & 5 blades on a 22 footer?
Oscillations start because it is falling off the pad. Big words make it look like I know what I am talking about, don't hurt yourself! Anyway, great hull- just have to let it do what it is designed to do and then push the boat forward. Less blades, less drag. Less diameter, more pitch and prop torque is a bonus. Higher rake will bring the slip down and 70MPH here we come!
12-12-2010 | 08:07 PM
#22
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Joined: Oct 2007
Posts: 276
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From: Suffern, NY
I don't believe there is a rev limiter. I was told the boat should easily reach 70mph with my set up. But I'm only reaching about 62mph @ 5100 rpms but like I said as soon as I reach about 60mph the boat starts to porpoise and chinewalk bad. I try to correct it and the ass end starts to side
12-13-2010 | 08:57 AM
#24
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Joined: Aug 2010
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From: Bradenton, Florida
Thanks guys for all the info. I'm gonna doing a few things including going to a 25p prop. I was talking to a few local guys here and I think the problem is I didn't have it trimmed out enough to get it on the pad. This is a new boat to me and not used to the pad bottom.
12-13-2010 | 07:55 PM
#26
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Joined: May 2005
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From: Northeast
You may well be correct. My first Velocity was a 260 (24') and I was a bit frustrated at first with the speed. I was trimming it like any other boat I had owned. Once I figured it out, I went from low 60's to over 70. If you are truely putting out 450 HP, then it sounds as though the boat is not trimmed enough given the RPM you are getting with a 23 pitch prop. You should be able to run a 25 pitch 4 blade with no problem into the 70's. The correct prop will make a huge difference on bow lift or stern lift, thus speed and handling.
12-13-2010 | 10:00 PM
#27
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From: Ivoryton, CT
I think a bravo drive is longer than an alpha. If you didn't raise it you may be too deep with the prop shaft. Try a smaller dia 4 blade prop/. The Merc revolution 4 might work better than B1s or QIVs.
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Patrick
Patrick
12-14-2010 | 01:06 PM
#28
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From: charlotte nc.
Pat i thought the same thing but a guy here that has do some of the up fits says no they are the same
12-14-2010 | 10:21 PM
#30
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From: Ivoryton, CT
I ran the Rev 4 on my 24' Superboat. It is the 4 blade version of a Mirage plus, 14.5 dia. vs 15.25 dia for the B1. The Rev 4 works well deep like the Mirage and Mirage plus. The prop shaft on my 24' Super was 5" below the bottom. The Rev 4 was the best stock prop I ran on that boat.
I like the B1 on my 26'/280 Velocity for all around perf.
I like the B1 on my 26'/280 Velocity for all around perf.
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Patrick
Patrick
