Freestyle Will I be under propped?

[slinden]

Building a new motor for my Gen2 BOB (hybrid-Kawi motor Yami pump) and I am wondering if my old prop will be to short.

Specs:
SXR base motor
82mm pistions
Freestyle porting by Wade Chapin
190 psi
FP wet pipe w/ Xmetal waterbox
Dual Buckshot 46's
Vforce 2's

Yami Pump
Solos Mag
9/15 Hooker
Xmetal trim
85mm nozzle

What do you think, will I need to go to a 10/16?

 

[JetManiac]

Depends how good this setup hits off the bottom. Also for flat where you posted or surf?

 

[slinden]

All flat water

 

[kevbo]

Building a new motor for my Gen2 BOB (hybrid-Kawi motor Yami pump) and I am wondering if my old prop will be to short.

Specs:
SXR base motor
82mm pistions
Freestyle porting by Wade Chapin
190 psi
FP wet pipe w/ Xmetal waterbox
Dual Buckshot 46's
Vforce 2's

Yami Pump
Solos Mag
9/15 Hooker
Xmetal trim
85mm nozzle

What do you think, will I need to go to a 10/16?

It depends on your exhaust port height. If it is down near 180 open then you may be able to pull a 10/16. If it is 190+ then leave the 9/15.

 

[slinden]

It is spinning the prop bad. Anyone want to trade for a pretty new 9/15 for 10/16?

 

[Crab]

Try stock bore nozzle first

 

[subhard]

I have a 11/17 coming with my 760 and I'm worried about it being too much prop, but I've never ridden a ski that's over or under propped. What exactly do you mean by "spinning out"

 

[Crab]

Feels like cavitation, air leak will also cause it