Freestyle 155MM Setback Mag Pump with XS1015 Motor - where to pitch?

[Roo]

so i after much dreaming and staring at pics / threads about it, i want to try the Japanese pump approach... large pump, with appropriate pitched prop.

i have a line on a Skat 155MM Setback Yamaha pump I could pick up for a very reasonable cost.

as of right now, drivetrain is:

-XS1015CC motor (49MM Full Spec Carbs)
-PowerFactor Pipe w/PowerBox (waterbox)
-MSD Iginition

all going into a carbon hull around 55-60 LBS.

my question is - what would be a good starting point for a prop pitch wise?

one goal - bottom end power.


looking for any kind of feedback anyone has to offer.

-Andrew

 

[snowxr]

14-19 swirl c-75 skat.

 

[JetManiac]

14-19 swirl c-75 skat.

C-75 is a 144mm impeller and 14-19 seems tall but i have no experience with 155s.

 

[D-Roc]

e-75 prop and i am going to try a 9/15 swirl with 90mm exit nozzle.

 

[Lucaumpits]

13/18

 

[OCD Solutions]

I have a brand new 14/19 E75 I would love to unload to one of you 155mm freaks. It's the big thread one from the 2000+ SUV so it would need a big thread shaft or an adapter to reduce it down if that's even possible. $125 shipped if you think you can make it work.

 

[Roo]

C-75 is a 144mm impeller and 14-19 seems tall but i have no experience with 155s.

ya - my notes say this would be good for more of a 148mm pump (14/19).

e-75 prop and i am going to try a 9/15 swirl with 90mm exit nozzle.

in my mind this seems more like it - something pitched way lower. but aren't you running a smaller motor? (less then a 1000cc)

where did you come up with 9/15? what reduction nozzle are you running?

i have been following your thread and can't wait to hear your feedback.

13/18

that tall, eh?

i was running a 13/19 prop on the 145mm mag pump.

155mm mag with a 13/18 prop with the xs1000 spinning it - wouldn't be to much?

 

[D-Roc]

I will be running it with a771 dasa pv and eventually a powerfactor pipe. I have the 155 reduction nozzle but it needs to be modified and beefed up so I can use the skat exit rings to dial it in. Either that or I order the skat reduction nozzle without the trim system

 

[Roo]

I will be running it with a771 dasa pv and eventually a powerfactor pipe. I have the 155 reduction nozzle but it needs to be modified and beefed up so I can use the skat exit rings to dial it in. Either that or I order the skat reduction nozzle without the trim system

something like this:

http://www.skat-trak.com/watercraft.html ?

[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]Aluminum Yamaha GP 1200R Venturi Nozzle, Trim Ring and Steering Nozzle[/FONT]

 

[superwetbrett]

i would say 11/17. really i would go with a 148, i don't think the xs1000 makes the power to need the 155

 

[D-Roc]

Yeah that's the one I was thinking about getting.

 

[Roo]

i would say 11/17. really i would go with a 148, i don't think the xs1000 makes the power to need the 155

if pitched right for low end only, i don't see why it couldn't be made to work (perhaps).

i am also thinking of a bigger motor down the road as well.

while 148mm is on the mind, i'm not in the mood to buy one, just to sell and upgrade say only a few months / season down the road when i do a bigger motor as well.

 

[D-Roc]

Yamaha did this with the gp800r to gain hole shots. It will work. It's just not needed.

 

[superwetbrett]

if pitched right for low end only, i don't see why it couldn't be made to work (perhaps).

i am also thinking of a bigger motor down the road as well.

while 148mm is on the mind, i'm not in the mood to buy one, just to sell and upgrade say only a few months / season down the road when i do a bigger motor as well.

i hear you, give xscream a call i am pretty sure they have tried a 155 on the 1000.. they might not want to tell you what prop they used because of how small it was..

 

[Idok]

if pitched right for low end only, i don't see why it couldn't be made to work (perhaps).

i am also thinking of a bigger motor down the road as well.

while 148mm is on the mind, i'm not in the mood to buy one, just to sell and upgrade say only a few months / season down the road when i do a bigger motor as well.

if that was the case, josh would have had a 155 on his 1100

 

[snowxr]

Xscream has been using 159mm pumps with their new 1200. While I do think that bigger pumps have merit, they are more difficult to mount cleanly.

 

[only you]

did you get this pump & try any pitch?? any feedback

 

[Roo]

did you get this pump & try any pitch?? any feedback

I live in Michigan.

My lake is currently frozen over.