Max IV 18hp mild build help needed.

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Thread: Max IV 18hp mild build help needed.

  1. 05-03-2016 06:48 PM #11
    Nubs
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  2. 05-03-2016 10:14 PM #12
    01argo
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    Quote Originally Posted by gotmuddy View Post
    did a little exhaust modding last night. made a huge difference.

    I just did the same mod on my Vangaurd 18 hp.Have not fired it up yet.
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  3. 05-04-2016 01:27 PM #13
    gotmuddy
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    it sure revs up better(after adjusting the carb some)
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  4. 05-04-2016 06:14 PM #14
    01argo
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    Quote Originally Posted by gotmuddy View Post
    it sure revs up better(after adjusting the carb some)
    That sounds good to hear.You mentioned possibly running thinner head gaskets.Any info if you can still run 87 octane or will you have to move up to 89 or 91?
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  5. 05-04-2016 10:15 PM #15
    gotmuddy
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    I don't think the compression bump will be enough that it's required.
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  6. 05-04-2016 10:40 PM #16
    01argo
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    Quote Originally Posted by gotmuddy View Post
    I don't think the compression bump will be enough that it's required.
    That sounds good.Any change in the exhaust tone with the exhaust restrictors out?
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  7. 05-05-2016 10:20 AM #17
    gotmuddy
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    not noticeable. If I have time before memorial day I am going to build a new exhaust
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