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Old July 3rd, 2008, 10:43 PM   #1
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Default Wide Open, What RPM are you at?

Also, what HP are you pushing for outboard guys.
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Old July 3rd, 2008, 10:46 PM   #2
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315hp
7,000

Hoser is probably around 250 and turns 8,000-8500
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Old July 3rd, 2008, 10:49 PM   #3
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Okay. so at 115hp at 6000 or so, I am not too bad
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Old July 3rd, 2008, 11:03 PM   #4
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Okay. so at 115hp at 6000 or so, I am not too bad
RPM and horsepower do not have any correlation. I am running a 3.0 liter "big block". Hoser is running an old school (late 80's) 2.4Liter. If its a merc 115 straight 6 I wouldnt turn it over 53-5500

What 115 are you running?
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Old July 3rd, 2008, 11:07 PM   #5
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There are also other guys out there with 2.5 liter 260 hp motors spinning 10,000-12,000 RPM
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Old July 3rd, 2008, 11:21 PM   #6
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315hp
7,000
Correction: 0 hp a 0 RPM currently
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Old July 3rd, 2008, 11:34 PM   #7
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Correction: 0 hp a 0 RPM currently
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Old July 4th, 2008, 12:06 AM   #8
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all depends on motor and how its built i have turned mine way past 8000 -8500 but usually i keep a prop on it that will only turn 7800 or so
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Old July 4th, 2008, 08:44 AM   #9
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RPM and horsepower do not have any correlation. I am running a 3.0 liter "big block". Hoser is running an old school (late 80's) 2.4Liter. If its a merc 115 straight 6 I wouldnt turn it over 53-5500

What 115 are you running?

Big Johnson. A V-config, not straight. I also only have a 19 pitch prop.
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Old July 4th, 2008, 08:59 AM   #10
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Big Johnson. A V-config, not straight. I also only have a 19 pitch prop.
V4 Johnson. Is it a looper or a cross fire?
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Old July 6th, 2008, 08:39 PM   #11
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Dude, it all has to do with your prop also. with my 19 pitch prop, i'm kissing 7000 rpms (which is redline), but with my 28 pitch, i barely hit 5000.

I have a Johnson 225 HO outboard.
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Old July 6th, 2008, 08:43 PM   #12
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sounds like your 28 pitch is WAY too much prop for your boat. with a 225 you should be at least kissing 6,000 even with a tall prop.
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Old July 6th, 2008, 09:07 PM   #13
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you guys do know that its not all about RPM's in 2-strokes right?
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Old July 6th, 2008, 09:11 PM   #14
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you guys do know that its not all about RPM's in 2-strokes right?
yes, but lugging his motor around at 5,000 rpm with a 28 pitch prop is not so good for it.
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Old July 6th, 2008, 09:16 PM   #15
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sounds like your 28 pitch is WAY too much prop for your boat. with a 225 you should be at least kissing 6,000 even with a tall prop.
No doubt. It came with the boat and I wanted to see what it could do. That 5000 rpms is at low 80's by the way. Took a full 30 seconds to get up on plane

I'm looking at 21 pitch props. I'm thinking I'll get the hole shot that I want and the top end that I want also.
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Old July 6th, 2008, 09:19 PM   #16
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I would guess somewhere around a 24 would be better for you.

On average you will get 200 rpm per inch. 28 @ 5000 and 24 @ 5800 ish would be better for you I would think.
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Old July 6th, 2008, 09:22 PM   #17
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yes, but lugging his motor around at 5,000 rpm with a 28 pitch prop is not so good for it.
true dat...but neither is spinning it to the moon
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Old July 6th, 2008, 09:26 PM   #18
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No, but I know that my boat and I am assuming Dave's since its a 225 HO is new enough to also have a rev limiter.

Most of the Hi-Perf boat guys are turning at least 8 or 9. At least eh guys fast enough to have something to brag about are anyway.
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Old July 6th, 2008, 09:44 PM   #19
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No, but I know that my boat and I am assuming Dave's since its a 225 HO is new enough to also have a rev limiter.

Most of the Hi-Perf boat guys are turning at least 8 or 9. At least eh guys fast enough to have something to brag about are anyway.
ya, but you'll get some guys that try and build their shit and claim they can spin 10,000+...first off that shit won't last, second the port timing would be all off in a motor not designed to spin that high, they think they are making it faster while in reality they are making it slower....new motors have almost the best tune they could ever get right out of the box...people start messing with porting and junk and end up slowing the thing down either on the high end or low end...once you start making more power somewhere else you lose it on the opposite end, it's just a fact on how two-strokes work, but you know that!
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Old July 7th, 2008, 10:03 AM   #20
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raise dah portz as t rex would say
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