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  1. #11
    Join Date
    Jan 2008
    Location
    Keuka Lake, NY
    Posts
    5,909

    Default

    Is the HDPE strong enough for the force of the water or will it break off, the OEM use Aluminun For a reason I assume.

    Great write up and mod BTW..
    A Day at the Lake...Priceless
    A Day in Powder...Endless


    Joe V
    2012 Möbius XLV~ Loaded & Exiled
    2007 Outback V ~ sold

  2. #12
    Join Date
    Jul 2013
    Location
    Cedar Falls, IA
    Posts
    403

    Default Trayson's DIY "Supra Surf System" (SSS) modeled after the NSS

    Looks like you've got a good design started. I have similar concerns with the hull strength, material and 1/4" hardware. I really don't know how much force these see... I guess the wakeplate or trim tabs don't take a whole lot of support. I'm tuned in, good luck!


    Sent from my iPhone using Tapatalk
    2013 Moomba Mojo 2.5
    Exile SXT9's, Xi12D, Javelin, 800.4, ZLD MKII

    2012 F150 Ecoboost

  3. #13
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    728

    Default

    Quote Originally Posted by motosno963 View Post
    the stern is flat from about the top of my swim platform down
    Then it's probably work well.

    Quote Originally Posted by sandm View Post
    dumb question, but are you sure the hull at the rear can support the forces that will be cast upon it from what this is going to be doing?

    surfgate puts a much different stress on the hull than the nautique nss, or moomba flow.
    We'll find out. In a lot of ways, the baseplates are actually going to function to strengthen the hull. adding reinforcement in my opinion.

    Quote Originally Posted by Cigars n scotch View Post
    Wow this type of ingenuity astonishes me! Good luck with the project and I am excited to see how it turns out for you. Since you drilled these holes into your hull I guess you could say you're invested in "making it work" one way or the other. I am interested like berg asked to know about your hypothesis regarding the added hull drag/force.
    I guess there's only 1 way to find out. The other guy that did it on his malibu is having it work just fine and he didn't even through bolt his...

    Quote Originally Posted by jmvotto View Post
    Is the HDPE strong enough for the force of the water or will it break off, the OEM use Aluminun For a reason I assume.

    Great write up and mod BTW..
    The guy on the Malibu forums is using 3/8" HDPE for his blades and it's working just fine. I'm using 1/2" so mine is thicker. At least 2 of my bolts are on the swim platform backing plate. 2 are where there's extra hull material for the swim platform and the rest are near the corners where things would naturally be stronger.

    We shall see...

    Quote Originally Posted by uniwarking View Post
    Looks like you've got a good design started. I have similar concerns with the hull strength, material and 1/4" hardware. I really don't know how much force these see... I guess the wakeplate or trim tabs don't take a whole lot of support. I'm tuned in, good luck!


    Sent from my iPhone using Tapatalk
    Someone has to be the innovator and risk taker. I'm sure you all feel better knowing I'm doing it to my boat while you know yours are all safe and unmodified. Bottom line is that I am willing to push the envelope and I feel pretty optimistic about how it's going to pan out...
    2008 Moomba Mobius XLV. Monster Cargo Bimini, and more mods to come...

    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.


    Tow Rig: 2009 Honda Ridgeline RTL (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2000 Jeep Wrangler rock crawler), 1999 Audi A6 Avant, 2005 Kawasaki ZX-6R 636.

  4. #14
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    728

    Default

    So, as Washington tends to do in the spring, it rained tonight off and on. And there were times where it was coming down heavy so I had to figure out something to allow me to work on my boat. So I moved my offset patio umbrella and it worked PERFECT.



    Picking up where I left off last night, I took the blade that had the holes cut into it and made the lines for the channels. (the top actually needed another channel, but I fixed that later).


    So I mounted everything up and sealed it all with 3m 4200 fast cure. That stuff is sticky but after my experience with the 5200 on my transom lights, I learned to be careful with it. Here's a pic of the inside of my hull. I made 10 new holes. some of them have the bolts going from the outside in, and some of them are going from the inside out.
    2008 Moomba Mobius XLV. Monster Cargo Bimini, and more mods to come...

    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.


    Tow Rig: 2009 Honda Ridgeline RTL (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2000 Jeep Wrangler rock crawler), 1999 Audi A6 Avant, 2005 Kawasaki ZX-6R 636.

  5. #15
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    728

    Default

    So, I've got the Port side mostly done. I wanted to "learn" on that side since the goofy wake isn't that important to me. I have to trim down my hardware as they stick out about 1/2" past the nylock nuts. I guess better too long than too short. I used 1.5" fender washers on the bolts that form the posts for the channels of the blade. As you can see, I cut the top channel longer so it has more support.

    Here is a pic of the blade retracted.


    Retracted side view. I am not liking those bolts sticking out. But it's late and my neighbors would HATE me if I fired up the compressor and busted out the air grinder!!!


    Deployed. As you can see, the blade is sliding on the hardware, not directly on the baseplate. I'll add the knob later.


    Fully deployed from the front. Also, keep in mind that I designed it for 3" of full lateral excursion. I don't HAVE to use that much, it's fully adjustable. The excursion on the bottom is around 3/4".


    So, I moved on to the Starboard side. I have the lower baseplate cut out, and also the upper baseplate. I've got the back side of the blade cut out (where it goes around the swim platform bracket). I'll start drilling holes for the starboard side tomorrow...



    Stay tuned...
    2008 Moomba Mobius XLV. Monster Cargo Bimini, and more mods to come...

    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.


    Tow Rig: 2009 Honda Ridgeline RTL (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2000 Jeep Wrangler rock crawler), 1999 Audi A6 Avant, 2005 Kawasaki ZX-6R 636.

  6. #16
    Join Date
    Jul 2013
    Location
    North Mississippi
    Posts
    171

    Default

    Excited to see the progress. Thanks for the updates and looking forward to more!
    2008 Mobius LSV
    1100#er's in the lockers
    ski locker sac
    IBS
    Johnson reversibles
    3 vent heater (which my family loves)

  7. #17
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    728

    Default

    Cleaned up the port side today. I took some length off the bolt that were sticking out and installed the knob. I also trimmed a little off the bottom of the blade and baseplates because they were sticking beneath the hull even with the blade retracted. It was because of the angle of the stern transom. easily remedied. I also added marks to easily tell each inch of lateral excursion on the blade.

    Here's a revised Port side blade with the inch measurements:


    I continued on the Starboard side and it certainly came out nicer. As planned, I learned from doing the one side and was able to make the more important side better. I relocated the channels a bit and just generally improved on all my mounting points.




    2008 Moomba Mobius XLV. Monster Cargo Bimini, and more mods to come...

    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.


    Tow Rig: 2009 Honda Ridgeline RTL (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2000 Jeep Wrangler rock crawler), 1999 Audi A6 Avant, 2005 Kawasaki ZX-6R 636.

  8. #18
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    728

    Default

    Here is a pic that shows that the blade extends about 3/4" to 1" below the bottom of the hull. this was modeled after the NSS that does the same thing.

    (this pic is before we cleaned up the edges and smoothed everything out)


    Also, I added lines to the Starboard side too. This one extends 3" out laterally. In this pic, the edges were cleaned up nicely and it's in it's finished configuration. Next step is to water test.
    2008 Moomba Mobius XLV. Monster Cargo Bimini, and more mods to come...

    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.


    Tow Rig: 2009 Honda Ridgeline RTL (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2000 Jeep Wrangler rock crawler), 1999 Audi A6 Avant, 2005 Kawasaki ZX-6R 636.

  9. #19
    Join Date
    Mar 2010
    Location
    Irondequoit Bay, NY
    Posts
    1,298

    Default

    i hope you do some water testing tomorrow
    2004 Outback Blue/white w/5.7 indmar 350, Direct Drive
    Rockford fasgate cabins
    Rockford fasgate 500w amp (cabin) and a kenwood HU (kmr700u)
    Exile XM7's
    Exile Harpoon
    Exile ZLD
    Polk 10in sub (2)
    Polk P330 amp (subs)

  10. #20
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    728

    Default

    Quote Originally Posted by motosno963 View Post
    i hope you do some water testing tomorrow
    I had hoped to get out on the water Sunday for Father's Day, but it rained. And again it's raining today. Stupid Pacific NW.

    Hopefully I'll get out on the water on Wed or Thurs.
    2008 Moomba Mobius XLV. Monster Cargo Bimini, and more mods to come...

    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.


    Tow Rig: 2009 Honda Ridgeline RTL (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2000 Jeep Wrangler rock crawler), 1999 Audi A6 Avant, 2005 Kawasaki ZX-6R 636.

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