Freestyle What prop to spin in a 148MM set-back pump? 701 B-Pipe and 35cc ADA head.

[BrightE's]

I am slowly but surely building up my platform to go into an AM hull this winter. I currently have a 701, non-ported, B-piped with ADA 35cc domes.

What prop pitch would be ideal for me to spin in a 148 set-back pump for freestyle?

 

[Blue]

It will need to be small.. I ran a 10-16 in a ported 850. I believe Jetmaniac ran a 8-16 in his 148 pump with one of our BB 781 motors. Both motors were in carbon Superfreaks. May need to have a custom pitch until you get a bigger motor. Maybe 6-16 if there is such a pitch. Hope this helps..

 

[badvinny]

Get 33cc domes also if you want to stay pump gas.

 

[BrightE's]

Would a 8/13 be decent?

Sent from my VS980 4G using Tapatalk 2

 

[BrightE's]

Get 33cc domes also if you want to stay pump gas.

Badvinny - Is this because without I simply wouldn't stand the chance of having enough power to get the thing spinning anygood?

 

[BrightE's]

Any other insight floating around? Has anyone spun a 148 pump with a bolton 701?

 

[jetx]

I think steve-uk ran a 148 in a rev with a 701 a few years ago...may want to pm him and see what he says

 

[BrightE's]

Thanks Jetx, I'll reach out to him and see what he's got to say about it.

 

[badvinny]

Badvinny - Is this because without I simply wouldn't stand the chance of having enough power to get the thing spinning anygood?

33 should get you to 180/185psi, you probably only have 150ish, it will help, sorry, no idea what prop you need.

 

[BrightE's]

I've got about 170 right now with the 35cc's

 

[badvinny]

I've got about 170 right now with the 35cc's

35cc is close to stock, but 170 is okay, you should be okay to 190 on good pump gas even for cruising.

 

[BrightE's]

Bump for anyone who has used a 148 pump with a 701 driveline.

 

[steve-uk]

I think steve-uk ran a 148 in a rev with a 701 a few years ago...may want to pm him and see what he says

8-15.5 is what i ran

 

[stagesrt4]

im running a big hub 9/15

ran it with both my modded 701 and now with my modded BB781

has worked well with both setups


144mm pump tho

 

[Captain PegLeg]

148mm is a big pump and a big prop for a small bore engine... go with a really low pitch prop.

 

[swapmeet]

148mm is a big pump and a big prop for a small bore engine... go with a really low pitch prop.

Kinda what I was thinking. I mean you're ahead of the game for when you get a big motor later, but i'm not its the right size pump for a 701.

I'm assuming its a Stock SJ hull? Having a lighter hull will make a difference.

 

[BrightE's]

Kinda what I was thinking. I mean you're ahead of the game for when you get a big motor later, but i'm not its the right size pump for a 701.

I'm assuming its a Stock SJ hull? Having a lighter hull will make a difference.

The goal is to pick up a carbon AM hull this winter to drop everything into. The RN hull is sold and gone, and at this point... I'm boatless.

 

[swapmeet]

Ah... Right on! Yeah that should work, as long as a custom pitch prop doesn't eat you alive lol..

 

[KTM434]

Why not start with a bigger engine and get the pump later?

 

[Fast Elements]

We've had good luck with a 7/12 on some of the smaller motors in a 148 pump. You might need to go even lower then that without any port work or compression.