X2 prop ????

[john zigler]

Video talking about different impeller types, blade/hub design, etc;

Impeller pitch ring use. Measuring pitch;

 

[kevbo]

Blade root angle plays a big part in how much you can tweek the impeller. General rule 1mm on the trailing = 100 RPM depending on HP. Some other tricks are adding a "Kick" to the blade.

On small hubs root angle is never a problem, large hubs it can limit your ability to make drastic changes. The impeller is moving too slow at the root to contribute to anything other than pushing water outwards. Large hubs just fill a dead space and prevent water from recirculating back under the inside portion of the blades.

 

[WFO Speedracer]

All this info is great and wonderful and all that stuff , but keep in mind yesterday he asked what a progressive pitch impeller was.

That wasn't meant as a dig on LOVEWINS , it's a reminder of the KISS principle , keep it simple stupid .

 

[beerdart]

On small hubs root angle is never a problem, large hubs it can limit your ability to make drastic changes. The impeller is moving too slow at the root to contribute to anything other than pushing water outwards. Large hubs just fill a dead space and prevent water from recirculating back under the inside portion of the blades.

I completely disagree big hub small hub root angle plays the same role.

 

[kevbo]

I completely disagree big hub small hub root angle plays the same role.

Well, okay. You cant change the root angle but you can make any 30 year old straight pitch small hub work a lot better by bending the outside edges into a camber. It is impossible for the root to propel water aft because its moving slower than the jet stream. Someone finally thought of filling that area and now we have the large hub impellers.

 

[lovewinz]

All the information is good for me. Thanks!

 

[WFO Speedracer]

I run Pennzoil 40:1.

 

[kevbo]

I run Pennzoil 40:1.

So do I, but that part doesn’t matter. Getting the load right is extremely important but few riders seem to realize it. Impros made it a simple item on the list for superjet riders many years ago. Kawasaki guys never had it that easy so those skis got a bad rep for having no “ low end”.

 

[WFO Speedracer]

So do I, but that part doesn’t matter. Getting the load right is extremely important but few riders seem to realize it. Impros made it a simple item on the list for superjet riders many years ago. Kawasaki guys never had it that easy so those skis got a bad rep for having no “ low end”.

Trust me it matters, but a cut back Stock SXR prop works wonders on a 750 equipped X2.

 

[lovewinz]

So, I spent some time at the lake yesterday. I removed the intake grate to see if I was just over stuffing the prop. Still the rpm's 6500 so that wasnt it. I removed the ocen pro nozzle and put a stock x2 nozzle on. no change there. The best I have gotten is 45mph and 6562 rpm. So i'm over proped. I had a Mariner straight 16 and top speed was 43 and 7190 rpm. Do I drop to a 15 pitch prop? Whats the SXR prop pitch help,do?

 

[WFO Speedracer]

DAYUM