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  1. #1

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    mvvs 49 with tuned muffler

    Today I tached my 49 running 5% nitro 15% synth oil and APC 12-4. All leaned out it produced 14200 rpm which is 200 more than last time I tached it, I guess it is fully broke in now after about 3 gallons. I`m very impressed with this number and it actually passes my tuned ASP 52 XLS, if only barely

  2. #2
    Razor-RCU's Avatar
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    RE: mvvs 49 with tuned muffler

    The MVVS-49 is a monster, especially in the torque category- That is a REAL good number for 5%

    I gotta try one of those...
    Revver #5

  3. #3

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    RE: mvvs 49 with tuned muffler

    I just broke my MVVS 49 with Genesis Throttle Pipe in this weekend. The prop is an APC 12.25x3.75 and whilst I didn't get any figures the spool up was quite sluggish (to be expected I s'pose!) Fuel is ProSynth 5% but it's only had 1/4 gallon through so far.

    Has anyone got any tacho numbers on this prop?

  4. #4

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    RE: mvvs 49 with tuned muffler

    Hi, I get 13600 rpm at peak on that prop on my 49. The slow spool up on that heavy prop is the reason why I went to the APC 12-4 instead as it spools up much quicker.
    Also make sure you have leaned out the low end needle enough, otherwise the transition will be very sluggish no matter what

  5. #5

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    RE: mvvs 49 with tuned muffler

    Great stuff, thanks Asmund

  6. #6

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    RE: mvvs 49 with tuned muffler

    Your engine will develop more rpm`s and power after it has been running for a couple of gallons. Mine has become stronger and stronger the more I run it.
    By the way, it would be really interesting to hear what rpm`s you get on the 12.25-3.75 using that Genesis throttle pipe, when and if you have some tach readings


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