What does cut back impeller mean?

[JT_Freeride]

I recently bought a 5mm cut back impeller can someone tell me what this means and how it's beneficial.

Thank you

 

[gaby7mm]

i just buy the same skat trak 5mm cut back and its supossed to give more hook up.......

 

[JT_Freeride]

That's what I have. C75 swirl 13-17. Cut back. Would just like to know why it's better.

 

[gaby7mm]

reduced cavitation,maybe more brapppp! the cut back bring the prop closer to the vein section resulting better hook and less cavition

 

[TheBuzzard]

cut back means material has been removed from the back of the prop, allowing the trailing edge blade to sit closer to the pump veins.5mm cut back means it sits 5mm closer to the veins than an uncut prop. the less gap between the blades and the pump veins, means less slippage of the prop/better hook up.

 

[JT_Freeride]

cut back means material has been removed from the back of the prop, allowing the trailing edge blade to sit closer to the pump veins.5mm cut back means it sits 5mm closer to the veins than an uncut prop. the less gap between the blades and the pump veins, means less slippage of the prop/better hook up.

Thanks buzz

 

[RSKI]

Buzzard's explanation is spot on, I have also heard that smaller engines may work better with the edge of the blades being a bit further from the stator veins (non-cutback). The logic was the lower hp engine is allowed to more quickly rev to a higher rpm and get on the pipe sooner to make power quicker. Where in a high hp application you probably want the most hookup you can get (cutback).

I'm no expert, just what I've been told.

 

[227]

Obviously the "Thanks" button has been replaced by a "Like" button on the new format so I gave you a "Like" Buzzard, even though I meant Thanks. Personally, I liked the "Thanks" button better, its Facebook that's behind, not the X

 

[DAG]

How far are the trailing edges from the stator in a OEM 144 setup?

 

[TheBuzzard]

How far are the trailing edges from the stator in a OEM 144 setup?

the veins are angled on the stock pump, so it goes from less distance on the outside edge to more towards the center. the distance is also going to change depending on the pitch of the prop. the bigger the prop, the more the outside edge is tilted back towards the veins. mag pump veins are straight across, but the distance is still going to change with the props pitch.