Glen-L.com

Since I geep getting knocked off trying to send a private message to Terry Mc. let's go public..................man I am not a fast typer......

Terry you said a 550 pump can only get 340 lbs of thrust.
How much does a 650 get, And how does not HP. enter into the equasion?

A kawasaki add for a 800sxr 80 HP. puts out 628lbs of thrust.

I have been told that to increase lowend put in a 13'18 multipitch impeller and a scoup intake grate, and a 180psi compression head.
and for topend a biger carb and different exhaust.

No one can say how much increase I will get just changing out the pump.

I already have the 650x2 hull with the pump which has the trim adj. built in. All I have to do is cut out the old 550 part out of the TNT and graft in the 650 part, this winter.............

_________________
THE FRAUD WILL NOT GO AWAY..9-11 WAS AN INSIDE JOB...
http://www.youtube.com/watch?v=hZEvA8BCoBw

http://s147.photobucket.com/albums/r302 ... rd_photos/

Steve,

Sorry, but I can't help on the 650 thrust - the only way I know the 550 data is because it's in my manual, which is 550 specific. Given that the 550 enigne puts out about 37 HP, and an 80 HP puts out about double the thrust, I'd guess that the thust is about linear with HP, and that would put a 650 in the 420 lb range.

The pump thrust is a function of only impeller pitch and rotational speed (RPM), exactly the same as a prop on a boat. A higher HP engine will allow you to maintain a given RPM at a higher load, i.e. accelerate faster, but once you reach max rpm, that's all the thrust you can get. If you have more power, a higher pitched impeller will give you more speed (I don't know for sure, but I'll bet that the difference between a 550 and 650 pump is a different - higher pitched - impeller).

Please take a look at my post on my "first time out" problems, and see Caber's reply on a key in the drive shaft/pump conection. Do you have this arrangement? I thought I just had a splined shaft.

Peace,

TRM

(Quote)
I don't know for sure, but I'll bet that the difference between a 550 and 650 pump is a different - higher pitched - impeller).

........................................................................................................

The difference between the pumps is the 650 is about 1'' bigger dia.
An impeller from a 750 will fit a 650 pump. Side by side they look much
larger.

My shaft is just a splined shaft connection. Couldn't find the post you were
refering to.

_________________
THE FRAUD WILL NOT GO AWAY..9-11 WAS AN INSIDE JOB...
http://www.youtube.com/watch?v=hZEvA8BCoBw

http://s147.photobucket.com/albums/r302 ... rd_photos/

Here are some pics. of a js550 pump(which they stoped making in 1990)
and a 650 pump out of an x2(a strange looking 2 person ski).



The pump is much bigger, couple that with an upgrade in impeller it should have more top end.
The 650 is on the left and has a trim nozel.


The top drive shaft is a js550 , the bottom one is a 1987 650 x2. The shaft dia is smaller and the splines are different. The splines fit the 1990's on 550sx ,1990 is when kawasaki stoped making the js. But the rubber coupler that connects to the motor fits a full range of motors ,for manny years, and is the same on both.

_________________
THE FRAUD WILL NOT GO AWAY..9-11 WAS AN INSIDE JOB...
http://www.youtube.com/watch?v=hZEvA8BCoBw

http://s147.photobucket.com/albums/r302 ... rd_photos/

Steve,

Thanks, good info...

TRM

Im interested in this as well. But I'm not using kawi pump and motor. goin sea doo. My question is what size is the kawi pumps in mm? I have 2 options for the sea doo pumps a 144mm pump and the 155mm pump that comes on the 99+ sea doo xp limited and most of the 96+ 3 seaters with the 951cc engine. I plan on putting a 951 in a dynojet and want to get the most out of my boat. I like the smaller pump one because I have 2 of them, the other reason is because their all aluminum. Not the plastic pumps found on the newer ski's. Im doing my research before I start building, i just don't want to be limited by my pump. My other option is the new sea doo 4 tec pump, from their 3 cylinder 4 stroke pushing 265 hp. There are 2 versions of this pump a plastic one and Im prety sure a stainless or aluminum version. These pumps also have 9 or 10 stator veins stock. Only drawback is the high $$$ for anything off these newer ski's.

found this out today while looking for pump info.
this is the pump I used to run in my 750sxi race stand up. My motor was bored to 800cc. Had dual carbs, aftermarket cylinders and aftermarket head with an aftermarket tuned pipe made by factroy pipe. Stand up ski went 71mph on flat water. I ran the 155mm 12 vein magnum pump.

Our Ultra 150 Magnum Pumps are designed with either a 148mm or 155mm inside diameter, eliminating the water starvation problem caused by the stock mixed-flow pump. For maximum acceration and performance, our Ultra 150 Magnum Pump package includes: an aluminum Scoop Grate; aluminum Intake Shoe; aluminum Mounting Plate; 6, 8, 12, or 14 Vane stainless steel Stator Section; stainless steel Wear Ring; stainless steel Impeller of your choice; impeller shaft; sealed ball bearings; seals; a billet aluminum Tail Cone; aluminum Venturi Nozzle with 2 stainless steel interchangeable Nozzle Rings; stainless steel Variable Trim Ring; and an aluminum Steering Nozzle with 2 stainless interchangeable Nozzle Rings.

found here:
http://images.google.com/imgres?imgurl= ... tart%3D126