Custom/Hybrid 155 pump?

[1579]

So the question I have is... Is the stock 155mm pump better than a 144mm pump with a Solas mag stator? Thinking about trying to squeeze one into an F1 Pro hull with an 850cc. Already have a nice Sato trim, new wear ring, and a 144mm aluminum shoe, but still have to spend $750 on the mag stator/prop. I can get an entire 155mm pump assembly with trim for around $200.

I am lucky enough to say I have rode both Droc's ski (155mm with tbm) and BoostedBseries (144mm solas mag) skis. Both have properly dialed in motors and nicely 'tuned' pumps. I don't know that there is any significant advantage of the 155 pump with tbm or the 144mm mag from what I could tell. I think as long as whatever you have is set up properly they are both much better then the OEM 144.

 

[masterblaster]

the 155 would be better with a much bigger motor..prolly not much diff in a smaller motor

 

['kotajoe]

Im running an 1100 triple so its either grind at the tunnel a little bit and change out the pump shoe to run the 155, or get a tall impeller for the 144

 

[D-Roc]

It makes a difference.
I run my trim locked to one position, it's adjustable but does not move when locked in. I think I have a reduction nozzle that does not use a trim ring or it at least had the bosses to tap. It's pretty small exit diameter IMO and I think you can only bore it out to 87-88mm if you like it paper thin.

 

[Sharky]

well here is what a pump duct for a 155 looks in one of my new FP! hulls, you will see it does hang a little lower on the bottom of the ski and we had to modify the duct a bit to make it suit , but it is not unachievable , testing in a week or two with just a stock 760 wav blaster motor with head and pipe , stock 6 vein pump
We had to reposition the inserts hence the grind makes which still need to be sanded and buffed but not to bad if i say so

 

[Sharky]

forgot to mention the top of the pump needs to be ground off so the ride plat fits , also not sure but we actually fitted the fire wall when doing the pump so ours is aligned perfect with the motor , not sure how it will work with a stock superset but i can say i can now fit a 155 in my ski,s , weather i offer this option no idea yet LOL

 

[D-Roc]

Looks grate mate. I really like my 155 pump. What prop & pitch are you going to try?

 

[ChadGnarly]

Here is what i ended up doing to get mine to fit. Cut out the shole pump mounting area and glassed in a new mounting plate. Still have to finish and paint but it worked out pretty good.

 

[#ZERO]

Here is what i ended up doing to get mine to fit. Cut out the shole pump mounting area and glassed in a new mounting plate. Still have to finish and paint but it worked out pretty good.

Did you use the stock 144mm plastic pump shoe or the 155mm Blaster-II pump shoe?

Jet-Dynamic's also makes a 155mm aluminum pump shoe part number: JD155

 

[#ZERO]

Does anyone have a standard reduction and trim nozzle for the 155? I dont feel like running a trim tube through my hull this year and just want to keep the setup simple

You can use the Yamaha 65R reduction nozzle from a 1999-2004/XL700 or 1998-1999/XL760 or 1997-1998/WV700-WV760 if you want a 155mm size nozzle without the trim setup which is part number: 65R-R1318-00-00.

 

[ChadGnarly]

My pump is an sxr style so i just ground out the stock pump shoe area until it was big enough.

 

[scotts2t]

You can use the Yamaha 65R reduction nozzle from a 1999-2004/XL700 or 1998-1999/XL760 or 1997-1998/WV700-WV760 if you want a 155mm size nozzle without the trim setup which is part number: 65R-R1318-00-00.

Note this part has a slight upsweep on nozzle, around 5* I would say.

 

[davidescu_radu]

wave blaster 2 155 pumpshue copy is the best solution to all sj155 pump swaps