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-   -   29 Nordic MCOB stock 502 high slip (https://www.offshoreonly.com/forums/prop-talk/297229-29-nordic-mcob-stock-502-high-slip.html)

The Ace 05-29-2013 06:30 PM

29 Nordic MCOB stock 502 high slip
 
1 Attachment(s)
So I ran on Monday and came up with the below numbers. Seems like a really high slip amount. This is a straight bottom V. The prop is a Mirage 21 3 blade. Being pretty new to boating what would you run on this if it was your boat?

launchpad475 05-29-2013 08:01 PM

28's pretty high. most of us run 4 blades, some 5 blades.

Steve Zuckerman 06-01-2013 01:21 PM

I noticed you have 1:36 gears. Are you sure? If so I can tell you a switch to 1:50 gears should help you.
If the above numbers are WOT for a 502, they are way low, even with 1:36s.
The stock 502 Mags and 496 Mag HO Heats I've set up here can all pull a 26" Bravo 1 4 blade to about 5000 RPM with 1:50s,
which is about 65MPH, GPS. I don't know anyone running 3 blades anymore on an sport boat. They won't lock up or carry the bow.
Regards,
Steve

The Ace 06-01-2013 07:41 PM


Originally Posted by Steve Zuckerman (Post 3935210)
I noticed you have 1:36 gears. Are you sure? If so I can tell you a switch to 1:50 gears should help you.
If the above numbers are WOT for a 502, they are way low, even with 1:36s.
The stock 502 Mags and 496 Mag HO Heats I've set up here can all pull a 26" Bravo 1 4 blade to about 5000 RPM with 1:50s,
which is about 65MPH, GPS. I don't know anyone running 3 blades anymore on an sport boat. They won't lock up or carry the bow.
Regards,
Steve

1.36 is definitely stamped on my bravo 1. I am going to have to try a 4 blade. I tried a 3 blade mirage plus 17 and was able to spin the engine to 4800 but only ran 50mph GPS. This was loaded with 4 guys and a few coolers though.

I would like to do a 1.5 but will try a 4 blade 19 first. Thanks for the replies gentlemen!


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