12-14-2012, 10:35 AM #1
Prop set back and repitch questions
I wanted to see the pros and cons of the prop set back and re-pitch?
this is for Closed Course racing, and hole shot is a must,
Does the set back and adjustment just help hook up and top speed? does it also help hole shot?
what about taking off the nozecone?
Last edited by skigolfnut; 12-14-2012 at 09:57 PM.
12-15-2012, 02:52 AM #2
2 of my props are set back, helped clean up a little cavitation on my RXP that we use on the weekends but thats only got air intake/exhaust mods with a x charger, I tryed the set back on my lightwieght RXP and it was good but It didnt seem to help and cavi may have even been slightly worse....
I think with the bigger power running the set back had removed too much water volume from between the prop and stator
Bear in mind on the lightwieght I have a bearing seal on the d shaft and a seadoo centre cone in the pump also so there are some wuite big differences that could have a massive effect.
I think that you are at a point now where testing different setups is the only way you will find whats good for you, your boat and CC racing.
12-15-2012, 12:05 PM #3
thanks, I am running the et-137 wheel, with the rotax racing ECU and I know I move a lot of water--the bearing seal on my driveshaft really helped the cavitation issues off the line,
One of the members said that having the larger venturi 85/86 mm makes the cavitation worse, and that I should put on the 83/84mm ring and tune my current prop to 8550, then when summer hits put the 84/85 ring back in,
12-15-2012, 02:50 PM #4
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