311 Prop Choice--help
03-19-2003, 08:20 PM
#1
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311 Prop Choice--help
HAVE A 91 311 W/454MAGS---23"PITCH...BUT IM RUNNING 5000RPMS.....WOULD LIKE TO POSS GO TO A 24" 4 BLADE..WANT TO KNOW WHAT OTHER PEOPLE ARE RUNNING---IM RUNNING IN FRESHWATER--I'M HAPPY W/OUT OF THE HOLE PERFORMANCE BUT FEEL LIKE I'M REALLY TACHING IT UP W/SOME TIMES 5100RPMS AND I THINK THATS A LITTLE HIGH...
03-19-2003, 08:59 PM
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the mags peak power are at about 5,000. the owners i know with 420's are running 23 mirages too. you could try to pull a 25 like i have for my 272. i think the 311 doesn't need a 4 blade, waste's power turning the extra blades but you could try.
you can get your props lab finished for about $200 each and have a slight cup added. efectively giving you a little more pitch, but you are pretty close now.
just my opinion
you can get your props lab finished for about $200 each and have a slight cup added. efectively giving you a little more pitch, but you are pretty close now.
just my opinion
03-23-2003, 10:40 AM
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Hey Eliminator,
I have a 311 also, 1989. Your yellow 311 is just plain gorgeous!! Always likes the yellow paint scheme. Now that I'm done drooling over your "beautiful bird", I'm thinking your RPMs sound a little low. I have 454MAGS, I see you have 420s. Basically the same motors. Mine are supposed to run at about 5000 to 5200. I'm running 23s. Your speed sounds real good though. Have you had that low RPM checked? Is it right? No big deal, just wondering.
Once again, nice friggin' boat man!!!!!!
I have a 311 also, 1989. Your yellow 311 is just plain gorgeous!! Always likes the yellow paint scheme. Now that I'm done drooling over your "beautiful bird", I'm thinking your RPMs sound a little low. I have 454MAGS, I see you have 420s. Basically the same motors. Mine are supposed to run at about 5000 to 5200. I'm running 23s. Your speed sounds real good though. Have you had that low RPM checked? Is it right? No big deal, just wondering.
Once again, nice friggin' boat man!!!!!!
03-23-2003, 01:33 PM
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Thirdbird, the RPMS are low for sure.The boat has always ran the same RPM .I have never done any prop swaps . I should probaly drop down to a 23 pitch, just to see if the RPMS pick up. I have a new dash in the boat, all new gaffrig , still the same RPM.
03-24-2003, 10:51 AM
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Eliminator,
Even yellow goodies on the helm!!!!!! I gotta quit looking at your boat, makes mine look so normal!!!! You should hang on to that baby, truely unique, not many yellow ones around.
Where are you form Eliminator? I'd love to check your boat out up close and personal. I'm on lake Ontario, eastern shore by Oswego, NY.
Even yellow goodies on the helm!!!!!! I gotta quit looking at your boat, makes mine look so normal!!!! You should hang on to that baby, truely unique, not many yellow ones around.
Where are you form Eliminator? I'd love to check your boat out up close and personal. I'm on lake Ontario, eastern shore by Oswego, NY.
03-24-2003, 04:21 PM
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Mine is 89' 311 454 mags and Bravos. 23" Mirage top speed around 64-65 @ 4900 - 5000. The 89' 454 mag is rated from 4600 - 5000. Knowing the bottom end of these motors, and the fact that I don't run mine wide open for extended periods, I like to stay towards the upper end of the RPM range. Lugging a motor too hard can be just as detrimental as over-revving it. If it's running 5100 and you want to knock it down a bit, have your props turned up a bit. Any competent prop shop can do it. They can either add 1" of pitch or just add some cup to the blades.
As was said before, just my .02
As was said before, just my .02
