Thread: 15/20 or 15/22?
02-24-2010, 01:26 PM #1
15/20 or 15/22?
I have the mods listed in my signature box, and I was wondering if I would be better off with a 15/20 or 15/22 prop? I have an adjustable nozzle with 81-84mm rings to help dial in the RPM's without repitching, so I would like to get the most out of the prop with the least work. I am not planning on upgrading any further, so I am not concerned with having a prop for future mods. Most of my riding will be in high 80's to mid 90's air temp and mid to upper 70's water temps if that makes a difference. Thanks in advance to the help.
02-24-2010, 01:30 PM #2
Hi Justin, with those mods the 15/20R is the best choice.
02-24-2010, 01:32 PM #3
Thats kinda what I was thinking, but thought I would consult the "experts" before I bought one. What ring size do you think would be a good starting point?
02-24-2010, 01:33 PM #4
Re: 15/20 or 15/22?
definitely 15/20. if you need it tweaked contact duke!
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02-24-2010, 01:47 PM #5
02-24-2010, 11:46 PM #6
Does anyone know the RPM difference between the 15/20 and the 15/22 at WOT?
02-25-2010, 12:21 AM #7
- Join Date
- May 2007
- Auckland, New Zealand, New Zealand
Prop and Ring Size
I have always used the 82mm ring. As for the prop I certainly would not use anything bigger than the 15/20. It might need a bit of tweeking to get the rpm where you want it. I take it that you are working with the stock ECU.
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