Beginner highbanker question about pump selection

[Brehmdig]

I recently got this highbanker without a pump on a craigslist deal and was wondering if I could get this pump
http://www.redlionproducts.com/engine-drive/5rlag-2-aluminum-water-transfer-pump/
To work for it... Pump rating is 150 GPM so it seemed a little high to me.

Is there anyway to tone down the pump/ divert some water flow.

Also the pump outlet is 2" and the highbanker has a .5" input to it... What kind of contraption would I need to make to make this all come together?
Here is a pic of the highbanker. It's roughly 6" wide.

 

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[Goldwasher]

Ha ha Sacramento Craigslist? it was on there for a while. 150 gpm is the full throttle rating with no head pressure. It would allow you to run at an idle or slightly above. One tank of gas would run for a long time. You would have the option of running a bigger box later. I actually want a bigger pump for that reason. My highbanker is bigger than yours and I'm running around 45gpm. My pump has to be throttled up though. I would prefer to run 55 gpm on a pump that was running at half throttle or lees if possible. I don't know what gpm your sluice will need achieve optimum recovery.

 

[Brehmdig]

Ha ha Sacramento Craigslist? it was on there for a while. 150 gpm is the full throttle rating with no head pressure. It would allow you to run at an idle or slightly above. One tank of gas would run for a long time. You would have the option of running a bigger box later. I actually want a bigger pump for that reason. My highbanker is bigger than yours and I'm running around 45gpm. My pump has to be throttled up though. I would prefer to run 55 gpm on a pump that was running at half throttle or lees if possible. I don't know what gpm your sluice will need achieve optimum recovery.

Haha yea, I had a homemade highbanker that did decent so I figured I would grab a better looking one.
If you're going out anytime soon let me know! I'm always looking for tips/tricks.

So trying out with the current setup is the way to go huh?
Any suggestions on the 2"-.5" input would be greatly appreciated... I played with the Legos(PVC) in lowes tonight but couldn't get anything that seemed like it would workout.

 

[Goldwasher]

Ha ha Sacramento Craigslist? it was on there for a while. 150 gpm is the full throttle rating with no head pressure. It would allow you to run at an idle or slightly above. One tank of gas would run for a long time. You would have the option of running a bigger box later. I actually want a bigger pump for that reason. My highbanker is bigger than yours and I'm running around 45gpm. My pump has to be throttled up though. I would prefer to run 55 gpm on a pump that was running at half throttle or lees if possible. I don't know what gpm your sluice will need achieve optimum recovery. You would probably be fine with a pump around 80 gpm you could throttle down . Most likely gonna be in the 1.5 inch range as far as output. There are neat little Hondas that run 90 gpm but they are pricey.

 

[Goldwasher]

Got your P.M....I have no Idea why that double posted. Busy weekend I will be in touch.