Aftermarket Impelloer Bull S*&(

[frankcottnj]

I have looked at dozens of posts on impellers. The Solaris, the Skat TRak the gobbidy gooos what a bunch of nonesense. I have come across the fact that most of the people who have changed their impellers haven't posted back that their ski runs better. I have a 97 gtx, 98 GTXL and a Polaris 780 SL and I ride in chop in the Bay. I ran a solaris concord and it did nothing on the 97 GTX but it did help slightly with hookup.
The reason I am posting this is what kills the enjoyment of a jet ski (or motorcycle) is the hype and nonesene,. So, who out there has seen an improvement with these impellers?
Don't ruin this recreation by causing others to spend money they don't have to because it shrinks our community. Be truthful.

Frank

 

[KK40384]

Here's the thing with impellers. In order to benefit from a impeller with more pitch, you have to have the horsepower to spin it. If you don't do your research and put a impeller with too much pitch on a stock ski you're gonna hurt performance by a lot. Do it properly and there's a nice gain. Obviously the more powerful the ski the more gain you'll have. By upping the pitch on your GTX you're not going to see the same gain as upping the pitch one a new supercharged GTX. That said replaced my stock impeller on my RXT and picked up 4mph on GPS over my damaged stock one.

 

[Coastiejoe]

Many gain out of the hole and acceleration performance and either lose or remain the same on their top end.

This is the norm if you do not modify the engine in some way.

 

[red2blue]

Frank....

Air intake....fuel inj...boost....prop.....nozzle. They all affect the transfer of power. Change one without compensating elsewhere in the equation and an increase in performance will go under utilized or will flat out suffer.

Like has been said...those who think adding a taller prop without adding the extra hp to spin it properly will notice a drop in performance. You can't just listen to the dumbazz down the beach...or the slick talkin bllshtter of a service manager/salesman at your local marina.

Do your homework. Learn this sht for yourself.

Honest enough?

 

[RFoster130]

Where have you been reading this alleged nonsense. Very few people here push the idea of a different impeller. Its pretty much a given it helps bottom end slightly with the give up of a few MPH...not worth it in my book.

 

[red2blue]

RFoster.....

I think you need to qualify your last statement.

 

[mattydipps]

The reason I am posting this is what kills the enjoyment of a jet ski (or motorcycle) is the hype and nonesene,. So, who out there has seen an improvement with these impellers?
Don't ruin this recreation by causing others to spend money they don't have to because it shrinks our community. Be truthful.

Frank

i think if you let the "nonsense" get to you then you ruined the experience for your self.. if your expecting to listen to someone elses experiences and let that dictate how you tune your machine only to be let down by minimal gains... then you picked the wrong hobby..

if your pushing quite a few more rpms out of your motor then stock your going to have no choice but to help that power come out in a manageable way that wont have your ski bouncing off the limiter.. (impeller upgrade)

if your close to the stock rpms.. you will not see any gains worth a happier thread.

ive never looked at an impeller as a performance upgrade.. and i never will.

 

[KK40384]

Its pretty much a given it helps bottom end slightly with the give up of a few MPH...not worth it in my book.

Now there's some nonsense.

 

[Dr Honda]

none of this is nonsense.


Frank: Here's the deal.

some people buy a "performance enhancer" and expect a certain level of change for the $$$$. The problem is... in a boat/PWC... it takes a HUGE change to make a marked improvement. When, in reality... an impeller is only a tuning device.


With something like an impeller... there are WAY too many variables to know what's going to happen. If your pump, and impeller are perfect, and new... changing the impeller may not make much of a change. Also... on newer skis... they have spent their time to make better OEM impellers, and in the proper pitch. AND... in many cases... Skat-Trak, or Solas make the OEM impellers.

On the older skis... they would just put in an impeller, and not really focus on total performance. OR... the manufacture would focus on "Target Market" for data. So... if you have a mid 90's 3 seater... they are under pitched, to give you the ability to pull more weight, or a tube.


And finally... on the very old skis... they use to come with an aluminum impeller. They had a fat hub, and fat blades. Putting in a well constructed stainless impeller would make a night-N-day difference.



So... if you put a new impeller in your ski... and were expecting to have a 10 MPH jump... well... then you never actually read any post made here.


At the most... assuming you have a mid 90's ski... and the engine is in good shape (making full HP) then using a thin hub impeller (like a concord) with a little more pitch... then best you can expect is about 3 mph. But, if the engine is tired... then the added volume, and pitch may just bog the engine, and you won't gain anything.

Personally, I like Skat-Track "Swirl" impellers. They have more overlap, and fight cavitation better than any other impeller. In turn... they give great "out of the hole" performance... but they are known to scrub 1~2 mph off your top speed. But here again... if you pump is beat, you have a leaking shoe, a leaking D-shaft seal, and the engine is down on power... then you will have ZERO gain.


As a final word... since you only have 18 posts under your belt... don't come here, and complain about a performance part in general. If you want to make a complaint... then give EXACTS. (part numbers, compression readings, etc)


Oh... just an FYI... that polaris SL would have come from the factory with a Swirl.



That's my story... and I'm sticking to it !!

 

[frankcottnj]

Friends I used the Sola impeller for standard engines. My 97 GTX has good compression and I ddid a comparison with the stock and the Solas. I appreciated the feedback but I did not run a higher pitched prop.
Anyway I may just go with a skat trak because they hook up well in the chop. Thanks for the feedback.

 

[frankcottnj]

Thanks, that is what I have learned as well.
Frank

 

[frankcottnj]

I get what your saying. I think in my case I have to get a prop/grate that helps my GTX hook up in the 2 foot swells in the Bay. I own a 1999 Excelsior Henderson and I posted hundreds of post because I was one of the few people that honestly upgraded these bikes. I have a seen situations where people hype things up and cause folks to spend alot of money and then get disgusted. I designed an oil cooler for the Super X and I was competing with 3 other shops in the U.S. and I saw the other guys lie, hype up their products and even install my products wrong then blame me when their customers bent a valve blaming it on my oil coolers but not blaming it on themselves for selling the customer a stainless aftermarket valve that the customer didn't need. 18 post here but years and many post elsewhere and about the same thing.
So here is my question, on the 97 787 and 98 951 GTX's what should I do to help the hookup and keep the pump loaded in the choppy bay. I know about the tradeoff but want efficent pump thrust.
thanks
Frank