SoCal Jet Boats
Tech Talk => Projects => Topic started by: Nick on September 17, 2020, 12:58:05 PM
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Long time no post, still looks like a busy place with some familiar names but many new ones too.
Picked up a Hallett Miniday last year to better accommodate the family scene. Love the boat so far, it's got a bone stock 460, probably original motor and never been messed with but runs great so i'll leave it (for now).
I did do a few things to bring the pump up to current, I added a split bowl w/ double drill, Place mini snoot, hydraulic diverter and fresh powder coat.
Seems like there are a handful of other minidays around here now, so I'm hoping we can trade some good knowledge...do you guys have a pad porpoising issue around 3000-3300 RPMs? If yes, is your intake in the stock location? Who's added a ride-plate? That that help? Did you keep the intake in the stock location or set it back?
Looking forward to some good feedback!
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More detailed pic of pump
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Beautiful boat Nick, congratulations.
Is the transom cover dragging in the water?
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Beautiful boat Nick, congratulations.
Is the transom cover dragging in the water?
Thanks Joe, I hope all is well with you.
Not totally sure I'm tracking on your question but I think it might be coming from the fact that my previous picture wasn't quite clear enough, here's a better one.
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Yeah, it was an optical delusion from camera angle combined with the two-tone of the gel coat.
It looks like you have the right setup. Do you have a loader?
Could you get some pictures of the intake opening, where the fiberglass transitions into the aluminum intake?
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That’s a good looking boat. Congrats.
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Love the looks of the Hallett Mini day Cruiser. Very nice looking boat. Look forward to future updates.
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I had a mini day and I couldn't make it porpoise. It was solid at all speeds. It had a stock 460 in it.
I bet the HPH is giving it too much lift. Try a stock nozzle adapter and see if it helps.
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Here’s a better pic of the intake. Turns out it actually has some kind of loader already.
Interesting thought about taking the HPH housing off.
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Your last picture looks like a standard Hallett setting to me. I don't see any glaring issues.
The HPH would have been my choice also. The HPH doesn't lower the thrust point nearly that of a full droop. I feel the best feature is the internal shape.
Did you drive it much before changing the bowl, droop, and diverter? Basically, is this a new issue that has manifested itself since your upgrades?
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Your last picture looks like a standard Hallett setting to me. I don't see any glaring issues.
The HPH would have been my choice also. The HPH doesn't lower the thrust point nearly that of a full droop. I feel the best feature is the internal shape.
Did you drive it much before changing the bowl, droop, and diverter? Basically, is this a new issue that has manifested itself since your upgrades?
Good feedback on intake, I had guessed it was likely the stock location and likely setting as well, probably never touched since it was first built in ‘78.
Unfortunately, I did not drive it before the HPH and diverter were added so I can’t say whether or not this condition derived from those changes.
What are your thoughts on the loader? Could swapping that out provide any change for my porpoise issue?
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Good feedback on intake, I had guessed it was likely the stock location and likely setting as well, probably never touched since it was first built in ‘78.
Unfortunately, I did not drive it before the HPH and diverter were added so I can’t say whether or not this condition derived from those changes.
What are your thoughts on the loader? Could swapping that out provide any change for my porpoise issue?
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I guarantee it's not your loader. Try it with a stock nozzle adapter. Not all boats need a droop or HPH (mini droop).
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Can anyone offer any first hand info on the benefits setting the pump back and adding a shoe and ride plate to a Hallett mini day?
I see that blue and white one on here, not sure who the guy is but maybe someone could tag him in this thread.
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Hey Nick, I have the blue and white one I think your speaking of. Yes mine does the same thing as yours around 3000 rpm. 4000 rpm rides real nice! My set up is stock other than a new place diverter.
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Hey Nick, I have the blue and white one I think your speaking of. Yes mine does the same thing as yours around 3000 rpm. 4000 rpm rides real nice! My set up is stock other than a new place diverter.
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Thanks for the reply, sounds like we’re in the same “boat” on this topic. I’ve noticed as soon as I get the RPMs up over 3500 my boat also takes a nice set and stops porpoising.
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