What Pump and prop should I buy? - engine specs

[Jayski]

About to purchase a new pump & prop for a 20KG flatwater Freestyle Hull, id like some advice in which direction to go.

Engine specs: Lamely Powervalve 81mm bore freestyle ported cylinder, 10mm stroker (rad billet crank) (810cc), 210psi race gas, ported cases, Vf2 reeds with reed spacer, Twin 48 lamely carbs, match Ported bpipe (wz PV spacer), no waterbox, front exit pipe, MSD total loss.

I think that covers everything, What pump would people suggest i go for??

 

[Matt_E]

What does the engine builder recommend?



My own opinion: Some type of magnum pump, surely.

 

[Jayski]

About to purchase a new pump & prop for a 20KG flatwater Freestyle Hull, id like some advice in which direction to go.

Engine specs: Lamely Powervalve 81mm bore freestyle ported cylinder, 10mm stroker (rad billet crank) (810cc), 210psi race gas, ported cases, Vf2 reeds with reed spacer, Twin 48 lamely carbs, match Ported bpipe (wz PV spacer), no waterbox, front exit pipe, MSD total loss.

I think that covers everything, What pump would people suggest i go for??

Might add, I have a thrust ezpull Trim with riva +20mm 92mm OB turn nozzle, reduction nozzle is currently standard.

 

[Jayski]

What does the engine builder recommend?

My own opinion: Some type of magnum pump, surely.

Yeh i figured that much... I suppose i thought the people here might be able to assist, engine was purchased S/H and rebuilt

 

[JetManiac]

Sounds like a 148mm MAG

 

[Jayski]

Sounds like a 148mm MAG

maxxx setback? what pitch impeller...

 

[Aircraftsalz]

I would say 148 Mag pump, either Skat or Maxx... Prop I would say 10/16 with the 148 pump would be a good start

 

[Jayski]

I would say 148 Mag pump, either Skat or Maxx... Prop I would say 10/16 with the 148 pump would be a good start

thanks for the help- what do i do about nozzles, currently have a stock reduction nozzle. ezy-pull trim ring, and a 92mm Riva +20mm turn nozzle, will this combo work with a 48mag? and max or skat? they are the same right...

 

[Idok]

thanks for the help- what do i do about nozzles, currently have a stock reduction nozzle. ezy-pull trim ring, and a 92mm Riva +20mm turn nozzle, will this combo work with a 48mag? and max or skat? they are the same right...

youre going to need a bigger red. nozzle....aircraftsalz might be able to help you there, but THAT is one of the things that will be tested/tuned specifically to your ski......

 

[Lucaumpits]

it could be completly different size of props,depending if your boat weight 100lbs or if weight 55lbs, we need more info there bud

 

[tor*p*do]

About to purchase a new pump & prop for a 20KG flatwater Freestyle Hull, id like some advice in which direction to go.

Engine specs: Lamely Powervalve 81mm bore freestyle ported cylinder, 10mm stroker (rad billet crank) (810cc), 210psi race gas, ported cases, Vf2 reeds with reed spacer, Twin 48 lamely carbs, match Ported bpipe (wz PV spacer), no waterbox, front exit pipe, MSD total loss.

I think that covers everything, What pump would people suggest i go for??

it could be completly different size of props,depending if your boat weight 100lbs or if weight 55lbs, we need more info there bud

20 KG = 44 pounds, FYI

 

[Lucaumpits]

10/15

 

[JetManiac]

thanks for the help- what do i do about nozzles, currently have a stock reduction nozzle. ezy-pull trim ring, and a 92mm Riva +20mm turn nozzle, will this combo work with a 48mag? and max or skat? they are the same right...

Yes, you use the same nozzles and trim.

 

[Jayski]

looks like a 10/15 or 10/16 with a maxxx 148- should i bore my reduction nozzle or does someone sell aftermarket items?

 

[Aircraftsalz]

Bore reduction to 85 or 86... Then we normally like to see +5 mm on the steering so 91-92 will be okay...

Pump cone will be the finally tweak to your puzzle.. I think your going to be right there with that setup

 

[lerott]

Maxxx pump cone is the small, I think it's better to have the medium, especially with bored nozzle

 

[Jayski]

Bore reduction to 85 or 86... Then we normally like to see +5 mm on the steering so 91-92 will be okay...

Pump cone will be the finally tweak to your puzzle.. I think your going to be right there with that setup

there isnt after market reduction nozzle that are able to be bored 86-89mm is there? i hear 85.5 is safe max bore for OEM..

Maxxx pump cone is the small, I think it's better to have the medium, especially with bored nozzle

yeh forgot about cones....

does anyone know when pumps will be available through maxxx again?

 

[Jayski]

Am i best putting a type 9 dry pipe on this motor rather than the B-pipe? will get give me better overall power?

 

[Jayski]

Or maybe a type 4, as a 9 might not clear the PV's?