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Thread: 277 exsaust plans, +

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    277 exsaust plans, +

    I have the 277rotax on my UL producing a meager 22-26 hp., yes it works but not well. knowing/believing I can bump that closer to 40hp with some work on ports and a tuned pipe would like to ask if anyone here has plans for the tuned pipe, I'm on a non existant budget and would rather not have to re-invent the wheel so to say by having to do all the engineering from scratch. I have all of the tools to fabricate the pipe, just need a set of plans for same, can anyone help?
    Also any suggestions on how to increase dependability(siezing on throttling down) on this old engine would be appreciated.

    Thank you
    David

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    Re: 277 exsaust plans, +

    You might be able to squeeze 40HP out of a 277 but then how long do you think it will last?

    Dana
    Starduster SA-100 (waiting to be flown home)
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    Re: 277 exsaust plans, +

    Quote Originally Posted by Dana View Post
    You might be able to squeeze 40HP out of a 277 but then how long do you think it will last?

    Dana
    About 17,330sec

    Would like to up the hp a bit, don't know that a full 40 is nessasary, yet the 22-26 is a bit sluggish ? looking for a quicker response in tight situations
    I'm very open to reality checks

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    Re: 277 exsaust plans, +

    I'd personally be happy with plans to build an expansion chamber (exhaust system) for a 277 Rotax not so much to increase HP, but instead to have something lighter than the boat anchor that Rotax calls a muffler. I cut an old, cobbled-up Rotax muffler apart a few years ago and certainly didn't see anything like I expected. I expected to see a straight section of pipe inside the muffler followed by a reverse cone, ala typical "expansion chamber" construction, but all I found was a open-ended pipe and a maze to quiet the exhaust on it's way to the outlet.

    Lynn

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    Re: 277 exsaust plans, +

    Another good reason to look at different exhaust systems, been looking through here for a post on mods to the 277, I ran across awhile ago, still looking.
    Yet that post didn't give any Plans/demensions for exhaust

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