SoCal Jet Boats

Tech Talk => Jet Pumps => Topic started by: Nuthead on March 07, 2016, 11:01:53 AM

Title: Berkley Pump Question
Post by: Nuthead on March 07, 2016, 11:01:53 AM

I'm new to Performance Jet boat stuff so learning & researching. I was told by a buddy I need to change to a C Bowl & add a droop snoot to my boat. To make it run more efficient & higher top speed. Its a 18ft Kona with a mild 454 BBC was told 425hp. It GPSed at 69.8 mph as it is right now. Is it worth messing with? Opinions?
Thanks Chad

Title: Re: Berkley Pump Question
Post by: GT Jets on March 07, 2016, 11:07:47 AM

I would leave it alone,  and you would need what is called a G bowl.

How does the hull ride now? Where does the water break from the sides?

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Title: Re: Berkley Pump Question
Post by: Nuthead on March 07, 2016, 11:14:42 AM

Sorry yeah meant change to a G bowl. I just bought it acouple weeks ago only had it out once & it rode good. Not sure yet were it rides in water next time I will get the wife to take a pic. He was saying doing those up grades would possibly get me to 74 mph.

Title: Re: Berkley Pump Question
Post by: Nuthead on March 07, 2016, 11:18:35 AM

Also when floored I top out at 4700 rpm.

Title: Re: Berkley Pump Question
Post by: GT Jets on March 07, 2016, 11:22:52 AM

Quote from: Nuthead on March 07, 2016, 11:14:42 AM

Sorry yeah meant change to a G bowl. I just bought it acouple weeks ago only had it out once & it rode good. Not sure yet were it rides in water next time I will get the wife to take a pic. He was saying doing those up grades would possibly get me to 74 mph.

I doubt seriously a droop would be worth nearly 5 mph. 2 maybe. It could effect the ride of that hull with a JE pump. Besides that,  it's quite a lot of work for 2mph, not to mention the cost.  All depends on how much dollars per hour you want to go I guess.

Looking at your set up you're  going to need to make new hydro lines,  the droop, the bowl,  steering extension among other incidentals, rough math,  you'll be in it just a touch under $1000.

I don't see it.  If you lose the ride quality,  you made a big step backwards.

If you had 600 hp estimated,  I'd say go for it. But with slightly more than a stock 454, I don't feel you can muster the Wheaties to make the droop work to its full potential.

I could be totally wrong,  but will stick my neck out to call BS on the 5mph.

GT

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Title: Re: Berkley Pump Question
Post by: Nuthead on March 07, 2016, 11:27:45 AM

Thank you for advise.  :beer:

I will just use it as it is & have fun!