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Nuthead

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Berkley Pump Question
« 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
  • Boat #1: 1992 Cole 20.5
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GT Jets

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Re: Berkley Pump Question
« Reply #1 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?

Sent from my SCH-I545 using SoCal Jet Boats mobile app

  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Nuthead

  • Karma: +0/-0
Re: Berkley Pump Question
« Reply #2 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.
  • Boat #1: 1992 Cole 20.5
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Nuthead

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Re: Berkley Pump Question
« Reply #3 on: March 07, 2016, 11:18:35 AM »
Also when floored I top out at 4700 rpm.
  • Boat #1: 1992 Cole 20.5
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Re: Berkley Pump Question
« Reply #4 on: March 07, 2016, 11:22:52 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

Sent from my SCH-I545 using SoCal Jet Boats mobile app

  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Nuthead

  • Karma: +0/-0
Re: Berkley Pump Question
« Reply #5 on: March 07, 2016, 11:27:45 AM »
Thank you for advise.  :beer:

I will just use it as it is & have fun!
  • Boat #1: 1992 Cole 20.5
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