Thread: RXP-X Cavitation
01-05-2009, 10:44 AM #1
I got my RXP-X modified running 77-78 on GPS but hurting from cavitation out of the hole. I have bent (Trailing Edge) the 15/22 to get my RPMs to 8440 and have drilled (3/8 holes) the grate and pump shoe. I am also running the Pump Extension.
Do you think I need a 3 blade or are the holes are causing the cavitation?
01-05-2009, 11:35 AM #2
- Join Date
- Jul 2006
01-05-2009, 11:39 AM #3
01-05-2009, 11:41 AM #4
How much did you bend your 15/22?
I think that the 15 degrees on the prop can cause cavitation when you have alot of power. I have seen where a 13 degree on front of prop will spin much better without cavitation out of the hole.
That does not mean that you can not run a 15/22 without cavitation. IF you have bent the traileredge alot, then your prop may not be effiecent anymore. YOu can only bend the trailering edge of prop so much either way before you screw up the progrssive pitch that is needed.
The 3 blade has been tested on the P-X and I have not heard anything good about it.
01-05-2009, 11:43 AM #5
Have you noticed any extra water in the hull?
01-05-2009, 12:04 PM #6
The hull is always dry, I used a brand new carbon/floating ring & driveshaft and it when together perfectly. The rubber bumper was installed. Out the hole hard and hit hits the limiter for about 2 seconds then pulls like a missile right up to 77.
I am running the 83mm nozzle and took about 1.5mm out of the 15/22. I read somewhere that the 3/8 holes in the grate could cause some cavitation, any truth to this?
01-07-2009, 11:05 AM #7
Anyone else running the pump extension with cavitation problems?
01-07-2009, 11:08 AM #8
What intake grate are you running?
Excuse me if you have already stated this.
01-08-2009, 07:08 AM #9
01-08-2009, 10:52 AM #10
- Join Date
- Oct 2005
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