First run today!!!!
04-26-2007, 07:32 PM
#11
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Are you running open exhaust? Must be loud as hell
04-27-2007, 09:48 AM
#14
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First time out on my 28 with the 525-last season had the 496HO--Love it!! 2 Questions, I eliminated the silent choice when I removed the 496-what are my options to quiet it down once in a while? Do them bolt on external mufflers work? What RPM's should I run at was doing 4900 BUT GPS was not working!!!
04-27-2007, 12:26 PM
#15
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So how do I get the RPM up to 5300 from 4900? I am running a 26 pitch 4 blade that throttle up cupped slightly. Cosmic I am running open pipes and it very loud! Thinking of mufflers that I can remove. Never really cared for silent choice. Unless someone can explain captains call-isn't that silent choice?
Last edited by risky; 04-27-2007 at 12:29 PM.
04-27-2007, 12:59 PM
#16
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you would need to talk to a prop place about taking a half to one ptich out of prop and have a good race lab done that will get you 300+ rpm .
- one pitch = 200 rpm + 300 for the lab will get 500rpm total and put you rite at 5400 rpm
good luck let us now how it run's.
or if you no someone with a 24 pitch prop just to try out it will give you a good ballpark #.
the 24 will scrubb some speed . but if you tweek your 26 prop it will run like a 24 but give you more speed
- one pitch = 200 rpm + 300 for the lab will get 500rpm total and put you rite at 5400 rpm
good luck let us now how it run's.
or if you no someone with a 24 pitch prop just to try out it will give you a good ballpark #.
the 24 will scrubb some speed . but if you tweek your 26 prop it will run like a 24 but give you more speed
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04-27-2007, 01:04 PM
#18
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I may be wrong here but wasn't there a issue with getting enough air into a 28 with a 525? I can't see how a 26 would be too much prop. I would even think a labbed 28 would be possible.
04-27-2007, 01:18 PM
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Pat said 26 four blade or labbed 28-so if a 26 is at 4900-how does a 28 labbed get me additional Rpm? The 26 I am running is cupped slightly and worked by throttle up-is this a cause for low RPM? The speed is there but the rpm is off if that makes sense..I am hoping to have the gps speedo fixed soon the handheld I think estimated high I think?
04-27-2007, 01:50 PM
#20
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That is correct at sea level and heavy saltwater. Fresh water and Altitude will kill your RPM. If you lab a 4 blade you will get about 300 RPM. A five blade will give you between 400-500 increases in RPM.
