Optimal Impeller for Solas Mag Pump

[skisinker]

Howdy. Got a 2010 Superjet, lightly ported and with a B-Pipe and AM Waterbox. It's currently perfectly set up for mid-range to top speed flat water shenanigans, but I do also use it in the surf regularly for wave riding. Having used some Solas Mag Pump-equipped SJ's recently, seems a must-have mod. All those skis have been pre-08 hulls though, so I don't really have a good point of reference for the difference a Mag would make to mine, with the already-slightly different post-08 pump config.

Assuming it's a worthwhile buy, what would anyone suggest the optimal impeller is for the ski as described? Seems everyone here runs Hookers, but then that's always for pretty much exclusively freeriding. I'd really like to keep the ability to carve some buoys as well as some waves if possible.

Might even add the extra tubbies into the bargain- seen a few threads on the X where some surf gurus say tubbying up a 2010 SJ is also a good use of some dollars.

Appreciate any knowledge anyone cares to share.

 

[Half flip95]

try it with the stock prop first

 

[Big Kahuna]

A Hooker is just a type of prop. Does the same as a Solas or Skat. Depending on your setup a hooked could be a great choice. What do you have in there now

 

[Fro Diesel]

Start with the stock 08+ prop it is an excellent choice. After that maybe 11/17 skat or a hooker 9/15. Hookers are great but expensive when compared to the stock 08+ prop.

 

[skisinker]

Thanks for the replies guys. I currently have a stock 08+ prop, which I have been very happy with for the riding I do as described in the OP. I was told by Thrust when I enquired about this that while the stock 08+ props are large hub, they are not correctly pitched for a Solas mag- as they will be putting the engine under more load than the OEM, the pitch needs to be different. So that's why I thought I would need to find an alternative that might be a good substitute for what I'm already running.

 

[skisinker]

Sorry, and I'm running a lightly ported 701 62T.

 

[eastcoastjumper]

edited to not spread wrong info...lol

 

[Fro Diesel]

For what its worth i bought a solas mag and run a stock 08 prop on it in a ported superjet and it rips!!!

From what i have learned tuning pumps, dont be afraid to dump $1k on different props and nozzles trying every combo to get it right and the most out of it...or just leave it alone and RIDE.

Most props out of the box are not the correct pitch they say they are. So buyer beware

 

[JetManiac]

08+ has a setback stock pump. You buying a solas non setback changes it to the 96-07 style where you have to change your driveshaft now. @skisinker

This is not correct, but it is very easy to be confused by the 'setback' terminology. There are pumps which are set back in the hull itself and also mag pumps which are setback within the pump.

The '08-'14 SJ has a pump that is set back in the hull by about 2", but the pump is a standard non-setback OEM pump which is the same pump and vane section as other superjets. The '08-up driveshaft is longer, but everything else is the same. Upgrading to a solas non-setback pump is the same as on other superjets, you reuse the same driveshaft with the new pump.

Setback MAG pumps from skat and others are different. The pump stator section is setback within the stator section itself. Mag pumps use vanes that are much shorter in length than stock. In a setback mag pump the vane section is moved to the rear of the pump. The bearing hub section is made shorter and requires a different driveshaft to match.

 

[eastcoastjumper]

This is not correct, but it is very easy to be confused by the 'setback' terminology.

school me @JetManiac I thought 08+ driveshaft was longer?
How did they add room in front of the impeller without making shaft longer? I have never seen an 08+ stator, only regular '96 which I had

 

[stefan]

I ran a jetmaniac 718 cc with TL and B pipe 190 psi, i ran a 9/15 hooker with the solas mag nozzel att 85 mm and a ATP cone. It was near perfect for flatwater and boat chassing.

 

[john zigler]

school me @JetManiac I thought 08+ driveshaft was longer?
How did they add room in front of the impeller without making shaft longer? I have never seen an 08+ stator, only regular '96 which I had

The shaft IS longer, and the pump sits back further than earlier SJ's.

The "pump tunnel" is longer on an 08-later SJ. They have the same pump stator mounted back further in the hull with a longer shaft. So you can still use a standard Solas pump, and build it with the later shaft and you are good to go.

To the original poster;

Your motor / set now, with porting, and a B pipe is making more power than stock. The Solas pumps do hook up more, and load harder. You "should" be able to easily still pull a stock impeller with a Solas in your ski with your mods.

If you were to go to an aftermarket impeller, I would recommend a Hooker, or Large hub Skat swirl. Although your stocker is a good impeller, there is always room for improvements. The Skats, and hookers have thinner blades, are set back, and again just hook even better.

 

[tomski]

The "pump tunnel" is longer on an 08-later SJ.

Sorry but this is incorrect information. The pump tunnel is actually shorter by approximately 2".

 

[john zigler]

Sorry but this is incorrect information. The pump tunnel is actually shorter by approximately 2".

You are correct, I meant to say it is mount back further in the hull, as compared to earlier SJ's (don't really know what I was thinking.)

 

[skisinker]

Some interesting information here, thanks all. I wasn't aware keeping the existing stock prop would be an option, so if this can be done and doesn't minimise the Solas Mag's performance it would definitely be something I'd consider before throwing a few hundred bucks at a new prop.

 

[skisinker]

So after fitting the Solas Mag and keeping the stock 2010 SJ Prop to see how it performed, it seems the stock prop isn't going to be any good. From mid-range up to top speed there is a quite a lot of cavitation, and the top speed seems somewhat reduced. There are endless threads on here about optimal props, and of course no real definitive answer, but I am leaning towards a Hooker 10/16 or a Solas Concord 10/16. People have told me 9/15 is very bottom-end oriented, and I would like as much of an all-rounder as possible. Any opinions on this or people's experiences would be gratefully received. To recap, I am running a fresh 62t 701, ported and B-pipe. Someone has even offered me a Skat 12/20 for free if I want to try it, but I have no idea how that would be as have no experience with impellers/impeller selection.

 

[JetManiac]

Sounds like you have it figured out, Hooker 10/16 for what you want.

 

[skisinker]

Thanks JetManiac, seems like that's the one to go for.

 

[Half flip95]

bare with me because I'm not an expert on this stuff... but your story is not adding up.


1) You said - "It's currently perfectly set up for mid-range to top speed flat water...I currently have a stock 08+ prop, which I have been very happy with for the riding I do"

2) The only change you have made to the ski since being perfect was add a solas mag stator section?

3) Thrust (and many others) said - "Solas mag will be putting the engine under more load than the OEM"


running perfect + additional load on pump = cavitation?

I would double check your installation.

 

[skisinker]

Yes, the only change is as you describe. Thrust said I would need a new prop at the same time as fitting a Solas as the additional load on the engine would require a different pitch to the prop I have on currently (a 2010 stock SJ prop). However, I thought I'd keep that prop on and just see how it went as a few people said it might be worth doing that. However, while it rips bottom end now following the Solas install, it has lost some top end and it feels like the ski is not hooking up properly at the higher speeds.

Some local ski builders have suggested much different pitches for the set up I have- one suggested 15/20, and another suggested 13/18 or 14/19. Plus there are other suggestions in this thread for pitch too!