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  1. #1
    DiscoWings's Avatar
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    MVVS / Evolution 58 tach Readings please.

    Post your mvvs/evo 58 tach readings
    thanks

  2. #2

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    RE: MVVS / Evolution 58 tach Readings please.

    Is this the engine that has an "attachment" to count rpms electronically? I don' t own the engine but it seems that the technology should be there since the ignition system is "counting" how many times the sensor passes the magnet anyway. Maybe I am not expressing this correctly but hopefully, you know what I mean. Seems natural all electronically fired engines should have that capability sooner, rather than later.

    Larry
    Larry

  3. #3
    AQA's Avatar
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    RE: MVVS / Evolution 58 tach Readings please.

    www.modelarji.com

  4. #4
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    RE: MVVS / Evolution 58 tach Readings please.

    I've started mine yesteday for the first time (evo58gx2)
    with a wood prop 24x8 and this muffler

    idle is 1600 and full rpm is 6800

  5. #5
    BaldEagel's Avatar
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    RE: MVVS / Evolution 58 tach Readings please.

    MVVS58Pro with a MTW 75K cannister exhaust, 22x10 three blade Mejzlik, 7650rpm. two tanks of fuel through.

    Mike
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  6. #6

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    RE: MVVS / Evolution 58 tach Readings please.

    MVVS 58 w/early Vlach ignition. BCM wraparound w/ rolled tips removed. 6200 on a XOAR 24-8
    Z

  7. #7

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    RE: MVVS / Evolution 58 tach Readings please.

    58cc engine at sea level, ~60% humidity:
    Test with MTW test reso pipe: rpm, header length cm, header dia mm; remarks
    Mej 22x10, TDreso;7700;25;28; slight hunting (unstable top rpm 7600 - 7800)
    Mej 24x10;TDreso;6500;25;28; slight hunting
    Mej24x10;TDreso;6800;40;28; slight hunting
    No hunting at richer carb settings

    Tests with KS 50 reso pipe:
    mej 22x10, KS50reso; 7600; 25;28; steady rpm

    Tests with final (available) 4-chamber MTW tuned pipe as soon as I can manage.
    Pe, (www.mvvs.nl), MVVS, MOKImotor, RCexl, MTW, Xoar, Mejzlik.
    Blessing in ignorance? There is sanctuary in analysis.

  8. #8

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    RE: MVVS / Evolution 58 tach Readings please.

    evolution 58gx2
    header dia. 28mm
    length 12"or 30cm
    ES Composite pipe
    Beila 24-8 carbon prop
    rpms 7500
    900 ft. ASL

  9. #9

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    Quote Originally Posted by duber3 View Post
    I've started mine yesteday for the first time (evo58gx2)
    with a wood prop 24x8 and this muffler

    idle is 1600 and full rpm is 6800
    Same muffler 3% kendall GT1 menz 23x8 idle 1400rpm max 6940rpm
    Xoar 24x10 6000rpm
    Last edited by särpet; 04-11-2014 at 11:10 PM.

  10. #10
    earlwb's Avatar
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    I was getting around 5750 RPMs using big wide Top Flite 24x10 prop. I had converted the engine to use the CH-Ignitions system versus the old Valach ignition system. CH-Ignitions has a really nice CNC machined amuminum sensor carrier. Plus the sensor only works with the one magnet, ignoring the second magnet, if you have the oder two magnet Valach system.

    Last edited by earlwb; 04-07-2014 at 09:04 AM. Reason: add more info
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