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  1. #1
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    Hydrostream vegas core vs. no core

    Hi everyone,

    I have a 1991 hydrostream vegas that i am restoring. The work on the core, floor and transom will be done at a boat manufacturer up here in Ontario, the only thing is i have a couple different options as to what way i would like it done. I originally wanted to have them do a balsa core and 3" transom but they are recommending two different options as well and all for a similar price.

    Option 1- thicker, stronger fiberglass layup and stringers rather than a "core" with the 3" transom

    Option 2- composite core with the 3" transom

    Option 3- balsa

    I read somewhere of another member here on a thread having a vegas with a stringer set up and no core, hopefully he can chime in. I am essentially looking for it not to be a race or top speed boat as i am out on the water approx. 25-35 hours per week through the boating season and where i boat is multiple lakes attached which does get choppy on weekends and there is a lot of traffic from larger boats throughout the summer as the lakes are on the trent severn. I am hoping to be in the mid to high 80 range if possible. I do have a rebuilt 2011 mercury 250 proXS that will be on the boat which is why i am opting for a 3" transom. I also read another post where they rebuilt their stream using composites and love it except it is very loud as you can hear the impact of waves.

    I am leaning towards option 1 but am unsure if there will be a substantial increase in weight. What would all of you experts recommend and is my speed goal realistic with a 28 or 30p drag 4 or promax prop?

    Thanks,

  2. #2
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    Can you link the thread about the loud composites? First Ive heard of it.

    As for the core vs non I too have pondered glassing only. My old boat had no core and it took on ZERO water and I mean ZERO. I left it in the drink for months on end and never took a drop. Glass was approx 1/4" thick and I have no idea how it was laid up I bought it that way.
    Hydrostream dreamin

  3. #3
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    Option 2

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  5. #4
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    Quote Originally Posted by LakeFever View Post
    Can you link the thread about the loud composites? First Ive heard of it.
    Hydrostreams were always noticeably louder than most other boats. This was most apparent when driving in rippled water. Kinda like driving a car down a pebble driveway. As the boats turned to mush they became much quieter. Several people have commented over the years how much louder the hull got after a recore.


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  7. #5
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    Right I see. I thought the comment was about composite recores being louder than balsa etc. That’s what had me scratching my head
    Hydrostream dreamin

  8. #6
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    I'd agree that a composite core can be louder than a balsa core. My brother has had a yellowfin, invincible and contender center consoles. The yellowfin was the only one that had balsa. It seems to have a sound deadening effect compared to the others. Seemed to ride softer than the others even though it was the smallest of the 3. Know other factors come into play but my impression was the wood core was more quiet. I believe yellowfin is still building with wood cores.
    Bullet CC w/ 225 Promax
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    STV Procomp with 280 (wife calls it the Ronald Mcdonald boat)
    Liberator 25 / twin 300XS

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  10. #7
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    You need a core, every time you double the thickness of the bottom you stiffen it by it’s cube. Also consider that in order to attain the same stiffness the amount of mass you would have to add would destroy any hopes of performance.
    Balsa done properly is better than composite.
    RIP RPM RACING
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  12. #8
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    Here we go, why is balsa better than composite?
    Hydrostream dreamin

  13. #9
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    Quote Originally Posted by LakeFever View Post
    Here we go, why is balsa better than composite?
    Name:  balsa.jpg
Views: 171
Size:  220.2 KB


    is gone


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  15. #10
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    Why certain builders never use anything but wood in transoms and stringers for I/O engine mounts

  16. #11
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    Strength? Thats the only balsa advantage? From what Ive read the negatives are lack of flex leading to cracks which streams are always cracked, i havent seen one original cored or not that wasn't cracked. The composite core materials have give to make them less prone to cracking and more forgiving means more durable. Plus the composites are not prone to water softening like balsa is. From what I've seen the major damage risks are the hull delaminating usually due to cracks and rotted cores. Or the hulls bust in half usually where too stiff meets too flexible.

    This is why i was leaning towards the composite core. Id give up some strength and gain in three other areas. Plus new mega pricey boats are all composite core so how bad can it be? Just my thinking and if Im off I like to be schooled back on track


    Plus boat builders dont want to sell boats that last 100 years, they want you to buy another in five or ten years. Even Howard himself said that was the intent with the streams was cheap throw away fun. Im sure if he was planning on building hulls to last 50+ years he would have taken a different tack
    Last edited by LakeFever; 01-16-2021 at 11:24 AM.
    Hydrostream dreamin

  17. #12
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    Typically lack of support range and acceleration of deflection leads to cracking.

    If you follow from the source of the shock waves on the hull with meters to map the spread and rebounding and convergence with fresh waves you be able to see the effects. Layup and backing go hand in hand. 50 year old light layups can't really be compared to the new hand in hand of layup and materials backing.
    That and everyone seems to be going far faster than the materials were built to handle. 60 mph in a 6inch chop is nothing to 90 mph in a lesser chop.
    All in all the streams are amazing that they don't splinter to bits.jmo
    Last edited by FMP; 01-16-2021 at 12:05 PM.

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  19. #13
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    Skaters are balsa. My brothers Charger is 32 years old, balsa, and tired. Would 30 years be enough life for you? My SS2000 is composite and should last 30 years. A cored boat is stiffer and lighter, RBT is right about thickness cubed. Core for sure, balsa or composite maybe depending what your guy is more comfortable with.

    Who is the builder? There are not many guys making boats in Ontario.
    Where on the Trent? We are on Cooch

  20. #14
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    Option 4 , more layup, stringers and balsa core with 3" birch ply transom
    Last edited by FMP; 01-16-2021 at 07:05 PM.

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  22. #15
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    OP's not even responding. I guess he figured it out for himself.

    83 V-King, Mercury 3.0 back on the transom
    Stop wearing the face bags people. Don't be a sheep!
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