Rideplates
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Rideplates

  1. #1
    Senior Member 71kona's Avatar
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    Default Rideplates

    i need some schooling on this, what do they do, performance and ride wise, where do you get them?
    this boat will be the death of me

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    Senior Member Brendellajet's Avatar
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    A ride plate is arguably a necessary performance bolt on for jet boaters that want to go faster. When used in conjunction with a shoe they help provide lift, improve time to plane are very helpful in tuning the boats attitude for best speed & safety. There are other benefits I'm sure...

    A proper rideplate needs a shoe to bolt to, which requires the pump intake be removed for machining to allow fitting of the shoe.

    You can buy the parts separately and fit yourself if you are a competent machinist, or one of the high performance pump builders can handle the install for you in several stages of completion. If you are in So Cal I suggest MPD. Jacks shoe kit is a work of art and is second to none.

  4. #3
    Cas
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    Quote Originally Posted by Brendellajet View Post
    A ride plate is arguably a necessary performance bolt on for jet boaters that want to go faster. When used in conjunction with a shoe they help provide lift, improve time to plane are very helpful in tuning the boats attitude for best speed & safety.
    providing the engine has the power to overcome the harder loading. I know of someone that just recently added a shoe and ride plate to his set-up wanting to get into the high 80's. His boat was running 81 before the additions and 70 after the install. Granted, he his some set-up to do but to gain back all 11 mph, he'll be doing some motor work.

    As said many many times in the past, most of these add ons come with no guarantee they'll work nor do they work on every boat.

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    Senior Member Brendellajet's Avatar
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    Would like to hear who did the work on that one...As with anything on jetboats its not just a plug n play deal...

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    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by Cas View Post
    providing the engine has the power to overcome the harder loading. I know of someone that just recently added a shoe and ride plate to his set-up wanting to get into the high 80's. His boat was running 81 before the additions and 70 after the install. Granted, he his some set-up to do but to gain back all 11 mph, he'll be doing some motor work.
    Steve, could you be more vague? Was this boat consistently running 81 or was that the typical one time deal? At least identify the make and style of hull as well as tell if it is a stock motor. What else was changed? I find it hard to believe that someone lost 11mph from the shoe/rideplate install, unless something was not done correctly(intake incorrectly installed, too much shoe, rideplate angle set way too low, etc.)

  8. #6
    jetboataholic HawaiianJet's Avatar
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    Some junk to weed through, but there is also lots of good information here.

    http://www.performanceboats.com//showthread.php?t=5788
    HJ

    ***FOR SALE*** 1978 19' Full Stringer Hawaiian Molokai Jet Boat w/ Berkeley 12JC-AB and Chevy 440 Tall Deck ***FOR SALE***

    Quote Originally Posted by mako shark mark View Post
    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

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    Cas
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    Quote Originally Posted by Oldsquirt View Post
    Steve, could you be more vague? Was this boat consistently running 81 or was that the typical one time deal? At least identify the make and style of hull as well as tell if it is a stock motor. What else was changed? I find it hard to believe that someone lost 11mph from the shoe/rideplate install, unless something was not done correctly(intake incorrectly installed, too much shoe, rideplate angle set way too low, etc.)
    Craig,
    I was hoping the owner would post up the info himself about it. It's a 70's Tahiti Tiger with a built up 455 Olds, to what extent, I don't know. I do know it ran a consistent 80-81 mph until the ride plate and shoe were added. As I said, there's TnT and set-up to be done as the boat has only been out once or twice since the change.
    edit- a custom stuffer was also installed.
    My step son had a 18' Southwind cruiser that he bought with a ride plate/shoe combo and as far as I could tell, a fairly stock BBC. The boat was running about 54 mph, rock grate and jetovator. He got the pump rebuilt and at his request, he had a stuffer installed, a loader and a Legend B. The boat lost 5 mph.....it's apparent that in both cases, the engine HP could not overcome the additional load.
    Last edited by Cas; 05-17-2008 at 07:27 PM.

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    Cas
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    Quote Originally Posted by Brendellajet View Post
    Would like to hear who did the work on that one...As with anything on jetboats its not just a plug n play deal...
    sorry Brendella but I won't name names as it seems every time a name is mentioned, it's construed as bashing. At that point 25 people come on to defend and 25 people come on to bash.

  11. #9
    Razor Wire Militia 髯岙喢殮作's Avatar
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    Quote Originally Posted by Cas View Post
    providing the engine has the power to overcome the harder loading. I know of someone that just recently added a shoe and ride plate to his set-up wanting to get into the high 80's. His boat was running 81 before the additions and 70 after the install. Granted, he his some set-up to do but to gain back all 11 mph, he'll be doing some motor work.

    As said many many times in the past, most of these add ons come with no guarantee they'll work nor do they work on every boat.
    Steve do you know if the intake * was checked before and was reset to the same specs? IMO thats a big loss with just adding a shoe and ride plate .. yes the setup has changed but again IMO 11 MPH thats alot

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    Cas
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    Quote Originally Posted by 髯岙喢殮作 View Post
    Steve do you know if the intake * was checked before and was reset to the same specs? IMO thats a big loss with just adding a shoe and ride plate .. yes the setup has changed but again IMO 11 MPH thats alot
    knowing the person that did the work, I'm sure all the work was done correctly.

  13. #11
    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by Cas View Post
    Craig,
    I was hoping the owner would post up the info himself about it. It's a 70's Tahiti Tiger with a built up 455 Olds, to what extent, I don't know. I do know it ran a consistent 80-81 mph until the ride plate and shoe were added. As I said, there's TnT and set-up to be done as the boat has only been out once or twice since the change.
    edit- a custom stuffer was also installed..
    I'll bet that there is something more than "some TnT and set up" that needs to be done.
    Either he added way too much loader along with the shoe and rideplate or the install has some major flaws.


    Quote Originally Posted by Cas View Post
    My step son had a 18' Southwind cruiser that he bought with a ride plate/shoe combo and as far as I could tell, a fairly stock BBC. The boat was running about 54 mph, rock grate and jetovator. He got the pump rebuilt and at his request, he had a stuffer installed, a loader and a Legend B. The boat lost 5 mph.....it's apparent that in both cases, the engine HP could not overcome the additional load.

    Again, I'll bet the loader is the problem. At 54 mph with a stock motor, there's no call for a loader. As for losing MPH, who's to say the pump work isn't suspect?

    More than one change at a time makes it impossible to accurately evaluate the gain/loss from any one of the individual changes.

  14. #12
    Cas
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    Quote Originally Posted by Oldsquirt View Post
    I'll bet that there is something more than "some TnT and set up" that needs to be done.
    more than likely

    Quote Originally Posted by Oldsquirt View Post
    Either he added way too much loader along with the shoe and rideplate or the install has some major flaws.
    I'm also guessing too much loader and too deep on the shoe.

    Quote Originally Posted by Oldsquirt View Post
    Again, I'll bet the loader is the problem. At 54 mph with a stock motor, there's no call for a loader. As for losing MPH, who's to say the pump work isn't suspect?
    again, no argument there but I'd rule out the pump work, he also lost about 500 r's along with the mph. My stepson told the pump builder he was going to be adding HP thus the reason why he requested all the changes. Since he sold the boat before adding HP or doing any TnT, he never gave any of it a chance.
    BTW Shawn, the 18' SW I'm referring to is the blue/white one on your website. It used to be Pat's.

    Quote Originally Posted by Oldsquirt View Post
    More than one change at a time makes it impossible to accurately evaluate the gain/loss from any one of the individual changes.
    exactly! I think the bigger point to all this is people should realize there's a lot more to performance than just adding parts. There's test and tuning to do to make the set-up right for each individual boat. If a person is thinking by just bolting something on will be a sure fire gain, they may be disappointed.

  15. #13
    Razor Wire Militia 髯岙喢殮作's Avatar
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    Quote Originally Posted by Cas View Post
    BTW Shawn, the 18' SW I'm referring to is the blue/white one on your website. It used to be Pat's.
    I do know there was a big blower motor in that thing before he sold it to your son.it ran well for a stock pump.. I would be suspect that the pump was setup for big HP when your son had it done and he didnt have the HP to push it. but if the person that did it is who I think it is then that says a lot
    give me a call sometime Steve..



    Shawn

  16. #14
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    Here's the rideplate/shoe I'm just about done fabricating. Still got to drill some more holes into the intake to secure, and then blend the shoe part.... I'm thinking a radius shoe, any thoughts?



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