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Author Topic: M94 hit n miss Flywheel weight  (Read 520 times)

Adirondack Jack

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Re: M94 hit n miss Flywheel weight
« Reply #30 on: November 13, 2020, 05:53:52 pm »
Hi Ben,...Yes, ...There's almost an addictive interest in trying to slow down the non-loaded rpm & hits per min but only so much can be achieved with flywheel/governor spring & weight mods & the stock firing hit "kick" indicates maybe too much stock compression exists..I ran some engine impulse power output to compression ratio flywheel inertia math numbers & it seems by significantly Reducing the Compression Ratio may be the Key modification to reach the ultimate Low rpm/hits per min goal..Since the sparkplug-cylinder head runs way to cold (even without water) anyway, I'm considering reducing the C/R by using 1/16--1/8" thickness rubber cyl head gasket spacer/thermal isolator to produce a hotter running cyl head cleaner combustion + slower running results...Happy motoring,...tom.
The head gasket spacer idea is a good thought.  My immediate concern however would be if one could achieve significant reduction with the stock cylinder head screws, (easy enough to use longer screws), and the existing exhaust valve pushrod?   One of our members shaved the piston I think .110”, and dished it out about another .040”, if memory serves. So you’re talking about an eighth inch spacer to achieve similar results?  Nevertheless, I like the idea, especially since it’s completely reversible if results aren’t to your liking.

Jim

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Re: M94 hit n miss Flywheel weight
« Reply #31 on: February 18, 2021, 05:15:51 pm »
How did these experiments end up?
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Cheers.
Jim

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Nick

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Re: M94 hit n miss Flywheel weight
« Reply #32 on: February 18, 2021, 05:22:50 pm »
How many holes did you end up with in the wall from flying magnets?

Fixed it for you Jim 😂
Nick

ShadetreeMotorcycle

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Re: M94 hit n miss Flywheel weight
« Reply #33 on: February 18, 2021, 05:53:19 pm »
Sorry guys!...when this engine showed up my shop had me working North of 65 hours a week plus close to 1 HR commute one way plus a bout with plantar fasciitis (foot arch pain) all this caused me to place this project on back burner. Now things have eased up at work but I was bite by a deadly "Steam bug"... Got a couple projects on the work bench then will circle back to hit n miss!

RedRyder

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Re: M94 hit n miss Flywheel weight
« Reply #34 on: February 18, 2021, 07:08:49 pm »
Plantar faschitis is truly painful. Sorry to hear this. I have been there.

 

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