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  1. #1
    Race, wreck, repeat delagem's Avatar
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    Anybody recommend an epoxy?

    I need to fill the crossover tube on an SXR intake manifold, as per recommendation of GroupK. Unsure what to use? It's a 1/2" dia passage about 5" long, between the 2 intakes. GroupK recommends filling them to improve carb signal.

    Any suggestions?

    From GroupK

    Inlet Manifold - The stock SXR inlet manifold has well designed passages that make it an excellent part for higher performance applications. Itís only drawback is the cast in crossover passage that exists between the two inlet runners. This passage is originally intended to offer smoother low speed response for the stock, lower rpm, configuration. The end result is that this crossover passage contaminates the clarity of inlet signal at high rpms. This contamination causes inlet signal to progressively weaken during a long full throttle run. This progressively weakening signal results in a progressive leaning out that can result in detonation damage to a piston. With the Sleeper and Hammer Kits, we block this passage with a high-grade epoxy, and then install the correct carb jetting for the true bored carbs and the blocked inlet manifold.


  2. #2
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    JB WELD is always good as are some of the other metal impreganated putties. With the putties you could force it into the passage completely or just seal about 1" on each end.

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I use Marine Tex (grey) for stuffing cases.

    http://www.marinetex.com/marinetexepoxyputty.html

  4. #4
    Race, wreck, repeat delagem's Avatar
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    Quote Originally Posted by xlint89 View Post
    I use Marine Tex (grey) for stuffing cases.

    http://www.marinetex.com/marinetexepoxyputty.html
    Hmm, interesting. Think the white would be ok? 'Cause I just happen to have a package of that hanging on the workbench from an ill fated 440 rear exhaust project.....

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    NO.......


    The white is for fiberglass and hull repairs.

    The gray is for engine repair.

  6. #6
    Connecticut CrazyA's Avatar
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    I've used the Devcon to fill cases and do mad repairs on stuff....

  7. #7
    Watcon's Avatar
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  8. #8
    bowsniper's Avatar
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    I like the west system epoxy with the "brownie mix" additive in it. it really sticks well and can be shaped into anything and stays put, but never have used it to make anything on an intake.Can be sanded,grinded,hoggeddown and not crack and wont flake away.

    Not sure if it can withstand gas n oil. but i'm guessing yes. They have many varieties to mix for various applications. You could email them and ask for sure.


    Both above posts look like great stuff to use!

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