Other Which impeller?

[Saltwater N Premix]

I have two impellers sitting around, which one of them would give me better bottom end? A Solas Supra YB-SC-C, and a Skat-Trak 13-18. And I think my blaster has a stock prop but I'm not 100% as I haven't had it apart yet to verify. Ski is all stock for now except for rideplate and intake grate. Are either of these a decent choice?

 

[SUPERTUNE]

The solas is good for a limited 650cc superjet, not enough prop for a Waveblaster, the 13-18 might be close to working, may need to bore the exit nozzle if it's a little too tight off the bottom.
The Waveblaster 1 props weren't real bad, little bit of cavitation in whitewash.
We used to use them in our 701 SN limiteds, hit really good off the line!

 

[Saltwater N Premix]

Thanks for the info, I noticed it cavitating in the whitewash. If neither of these is really a good match then I'll buck up and buy the right one, I want it to have some serious snap to it I will be setting it up as a freeride surf ski by the springtime. I will definitely be piping it but will more than likely keep it a limited engine setup unless I get extremely rich from now till then..

 

[Saltwater N Premix]

How about this one? A Skat 12-17 in a 98 SXi Pro with a Coffman pipe? Good bottom end? Bad?

 

[2Screwed]

I am currently looking for an impeller right now as well, but have no clue what the numbers mean other than pitch. Can someone explain what the numbers mean in terms of power band (low end, mid, or top speed). I want a good low to mid range impeller. Kind of like running 4.11 in a car

I understand that power of the motor has a lot to do with it, so lets just assume on the same ski we put several props on it and tested. Which number combination would give the best low to mid range power. I am fine sacrificing top speed.

I did a search but did not find a thread that had descriptions of the numbers only people talking about specific impellers. Hooker 9/15, Scat 13/18, 12/17......

Oh and sorry to hijack and older thread

 

[WaveDemon]

the lower the first number the more low end acceleration. It can be too low, and cause cavitation (like spinning your tires.)

 

[kevbo]

Generally the last number corresponds with the OD angle at the rear of the blade. The load tends to follow that number most closely. The first number is pulled from the MFGs a$$ because it never matches the front. When the ski is moving slow, props need a low leading edge angle so that water can flow over the blades without boiling. Steeper leading edges work good when the pump has a better supply of water entering it. Impeller designations are meaningless between brands and styles of props. You have to know exactly what you want when it comes to props. Modern props like the Concord, Swirl, and Hooker are wonderful and there is a lot of common knowledge about these. Older props can be OK but there were a lot of variations along the way so more experience is usually needed to find one that will work well.

 

[2Screwed]

Thanks, that sucks that there doesn't seem to be a good standard, especially when you are dealing with numbers and measurable items. I was hoping it would be more straight forward in picking one. I ended up getting a good price on a Skat 13/18 swirl. I hope it works out for me. Thanks for the replies.

 

[Tyler Zane]

Thanks, that sucks that there doesn't seem to be a good standard, especially when you are dealing with numbers and measurable items. I was hoping it would be more straight forward in picking one. I ended up getting a good price on a Skat 13/18 swirl. I hope it works out for me. Thanks for the replies.

i run a 12.5/17 swirl and im about to bore my nozzle to get more punch. this is on a jetworks 701 with all the goodies. this leads me to believe that the 13/18 may be too steep for what your looking for.

 

[2Screwed]

I was worried about that. After reading about every post on X, I'm leaning towards the Hooker 9/15 right now. Anybody want to trade a Swirl 13/18 for a Hooker 9/15?

 

[Tyler Zane]

post that in the want to buy section or for sale section. there isnt a trade section....

i think the 9/15 will work well for you from what i have read about them here. there is a thread somewhere that people post their motor and pump setups.

 

[Tyler Zane]

http://www.x-h2o.com/threads/79605-IMPROS-Hooker here it is...

 

[2Screwed]

Thanks, I believe that is the thread that convinced me to go with the Hooker. I might just give the swirl a go before changing it over. Reviews on it seem to be pretty good as well.

 

[Tyler Zane]

defiantly try it out. that way you can see the difference between the two first hand. i wish i could find a shorter prop to just test out, actually i wish i had a bunch to try just for shiits and giggles. im pretty happy with mine thou, pulls great threw the entire rpm range.. you might even consider keeping it in case you get some power adders and decide the 9/15 is to short. you could also have it repitched a little shorter at impros.