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  1. #1

    Heat barrier - yamaha watercraft gains

    http://www.ebay.com/itm/HEAT-BARRIER...7060a2&vxp=mtr

    Has anyone had any experience with this HEAT BARRIER or this just another waste of money?


  2. #2
    LugNutLS1's Avatar
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    My opinion not worth it. Spend this toward cooling mods or anything else really and get a much greater benefit. Doubt the intake can get hot enough with everything in check to make a measureable difference on GPS to be honest. My 2 cents

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  4. #3
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    If you are trying to squeeze ever bit you can out of the motor, its worth about 2 hp...

  5. #4

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    if you have a NA motor maybe worth a few HP, but on a SC motor I say its a waste.
    if you really could get more HP from a cooler intake you would see it water jacketed.

  6. #5
    Works but no rpm gains

  7. #6
    Thanks everyone on to the next one lol

  8. #7
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    These products are comical. Plastic has a higher heat capacity than aluminum, that spacer will actually stay hotter longer than aluminum and cause heat soak. Biggest snake oil product since the 70s

  9. #8

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    you would be missing the point. The spacer is designed to be a thermal barrier. They are made up of materials that have high heat resistance so they do not transfer the heat from the very hot engine block/head to the intake manifold.

    In many automotive situations the spacers work great. Now in our situation where we have a constant source of cool water we have much better ways of keeping things cool. In a standard automobile when the vehicle is not moving forward it requires a fan to cool the engine, and heat soak sets in, but in the marine world (when not using a closed system) we always have the water coming in at its ambient temp to cool things. (Closed systems have a constant ambient water to transfer the heat to but not as efficient)

    You are right and aluminum does cool after but it also transmits heat much better so it absorbs the engine block/head heat and becomes heat soaked. A spacer limits the transfer of this heat to the intake manifolds aluminum. But in our case the gains are very minimal as our engines can have very good cooling thanks to the unlimited source of cool water.

  10. #9
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    Phenol-formaldehyde is not a thermal insulating material, nor does it have the ability to act as a heat sink. It warms up to the same temperature as the engine and transfers heat to the intake manifold as if it wasn't even there. So do the metal bolts attaching the parts together (quite well actually). It retains heat and will continue to heat up your intake manifold when you shut the engine off.

    It's right up there next to 104 octane booster on the list of crap people spend money on to get power that do nothing.

  11. #10

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    Since they do not specify what its made out of lets use Bakelite as its material. At 20C Aluminum's thermal conductivity is 204 W/mk and and bakelite is .232

    Tell me again how it is the same as aluminum? I actually have taken courses on Thermo Dynamics in college as I was double majoring in Computer Science and Aerospace.

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