SoCal Jet Boats

Tech Talk => Jet Pumps => Topic started by: Cbecks93 on September 15, 2015, 09:49:42 AM

Title: Impeller size
Post by: Cbecks93 on September 15, 2015, 09:49:42 AM

I currently have an 18' v hull jet boat with a fresh 460 turning 401 hp and 492 ft/lbs of torque at 4800rpm and a Berkeley jg pump. This winter I will be rebuilding the pump and wanted to know what is the best impeller for me to put in with the engine I have.

Title: Re: Impeller size
Post by: mash on it on September 15, 2015, 10:13:54 AM

What RPM are you at now?

What Impeller is in it now?

Sounds like an 'A' will be your best bet.

Dan'l

Title: Re: Impeller size
Post by: brian777 on September 15, 2015, 12:14:24 PM

Here is a chart


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Title: Re: Impeller size
Post by: jyeager on September 15, 2015, 12:15:50 PM

An A sounds like a good choice. 👍👍👍


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Title: Re: Impeller size
Post by: Cbecks93 on September 16, 2015, 08:17:17 AM

Thanks for your opinions


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Title: Re: Impeller size
Post by: MPKardell on September 16, 2015, 09:42:38 AM

I'd go with the A-A.  Looks like a perfect fit, as long as your engine's torque curve will allow you to pull through the lower RPM's to get to 4800 RPM.  It should, since it sounds like it's not too radical in the camshaft department.

My 2 cts....

Title: Re: Impeller size
Post by: Cbecks93 on September 17, 2015, 04:14:55 AM

Would it make a difference in impeller size if I were to add a loader?


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Title: Re: Impeller size
Post by: mash on it on September 17, 2015, 09:11:41 AM

Quote from: Cbecks93 on September 17, 2015, 04:14:55 AM

Would it make a difference in impeller size if I were to add a loader?


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Not really, a loader might pull ~200 rpm off any impeller size, maybe more- maybe less


Dan'l

Title: Re: Impeller size
Post by: Cbecks93 on October 19, 2015, 08:43:41 AM

Currently there is an A aluminum impeller in the pump. What would the advantages and dis advantages be to using a stainless impeller


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Title: Re: Impeller size
Post by: jimpen on October 19, 2015, 08:57:16 AM

Quote from: Cbecks93 on October 19, 2015, 08:43:41 AM

Currently there is an A aluminum impeller in the pump. What would the advantages and dis advantages be to using a stainless impeller


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. It is used for engines above 500 hp power.


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