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Fast_as_a_shark

  • Karma: +0/-0
porpoising
« on: December 04, 2019, 08:36:16 PM »
I’m looking for some advise or knowledge on  porpoising hoping whatever you wanna call it it sucks. I have a southwind 19’ with BBF Berkeley pump droop snoot etc. No matter what rpm and where the diverter is angled it starts hopping really bad. Any help on this or a solution would be greatly appreciated


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jamiemwedmore1234

  • Karma: +10/-0
Re: porpoising
« Reply #1 on: December 04, 2019, 08:54:30 PM »
Need more info.   You have a ride plate ‘ setback pump ‘ what kind of droop ? Wedge’ has it always done it. 


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Fast_as_a_shark

  • Karma: +0/-0
Re: porpoising
« Reply #2 on: December 04, 2019, 09:00:17 PM »
I’ve tried it with and without the ride plate it is a place diverter ride plate mounted to the droop snoot, jg bowl not setback , I tried to wedge the droop snoot with 3* down


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jamiemwedmore1234

  • Karma: +10/-0
Re: porpoising
« Reply #3 on: December 04, 2019, 09:14:25 PM »
What’s the ride plate angle    And did it always porpoise or start after you changed something


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Fast_as_a_shark

  • Karma: +0/-0
Re: porpoising
« Reply #4 on: December 05, 2019, 05:58:15 AM »
3* , it’s always done it


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JordanDangerfield

  • Karma: +41/-0
Re: porpoising
« Reply #5 on: December 05, 2019, 07:38:04 AM »
Those hulls have a porpoising issue. I believe the problem is being exacerbated by the droop. Pull the droop off in favor of a stock nozzle adapter and run it. You may still porpoise at certain speeds, but it should get better.

Some boats are prone to it. Adding trim (diverter) or changing the trust angle (droop) can make the problem worse. My Advantage would porpoise at certain mid-range speeds if it wasn't trimmed right and the weight distribution was off.

Good luck on getting your pump and hull setup!!

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« Last Edit: December 05, 2019, 11:57:05 AM by JordanDangerfield »
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Bigblockchevy1691

  • Karma: +6/-0
Re: porpoising
« Reply #6 on: December 05, 2019, 08:03:57 PM »
What he said


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