MVVS / Evolution 58 tach Readings please.
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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
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RE: MVVS / Evolution 58 tach Readings please.
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franchi (02-20-2021)
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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
with a wood prop 24x8 and this muffler
idle is 1600 and full rpm is 6800
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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.
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.
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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 07:04 AM. Reason: add more info