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Thread: ESE's works engine tuner

  1. #33061
    Join Date
    18th May 2007 - 20:23
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    Quote Originally Posted by mr bucketracer View Post
    Quote Originally Posted by Frits Overmars View Post
    Attachment 343593
    Trying to shake that transponder to pieces?
    and up side down
    So it is, good spotting ...... our bad, again.

    Yes, I was surprised that the Two stroke measured louder on the sound meter than some four strokes but sounded much quieter than all of them.


  2. #33062
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    7th September 2009 - 09:47
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    Yo momma
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    Quote Originally Posted by TZ350 View Post


    Attachment 343588
    The only two stroke in the race.
    ]
    That's fucking sad!!!
    ..................

  3. #33063
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    12th February 2004 - 10:29
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    I kind of agree but there are a couple of very cool 4-strokes that nearly make up for it.

  4. #33064
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    25th March 2004 - 17:22
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    RZ496/Street Triple R/GasGas/ etc etc
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    It's the sad fact of so little base stock to build bikes from
    . The MB100 in your Avatar is from 1978. That's 41 years old.

    But I still have some crankcases just in case.
    I've been told. Dreaming`s free.
    Think I'll go, back to sleep.
    Everybody listen, voices in my head
    Everybody listen, do yours say, what mine says?

  5. #33065
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    3rd May 2017 - 04:03
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    1997 Yamaha rd 350
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    CreuzCopf

    Quote Originally Posted by ceci View Post
    In the Ryger the pumping volume reduction is 58cc, 50%.
    As in this other engine
    https://www.youtube.com/watch?v=TB9PGPnSEtA
    I use a bit other design. 50hp classical piston engine clone of 503cc Rotax was modified. I got 64hp at 6700 rpm without any additional modifications. 72 bore 61 stroke.

  6. #33066
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    12th March 2010 - 16:56
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    this is running?
    Significant

  7. #33067
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    4th September 2017 - 10:39
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    Quote Originally Posted by jbiplane View Post
    I use a bit other design. 50hp classical piston engine clone of 503cc Rotax was modified. I got 64hp at 6700 rpm without any additional modifications. 72 bore 61 stroke.

    Congratulations on your success
    It is evident that in his design, the loss of pumping volume is less.
    The increase in power, what mystery is it due to?

  8. #33068
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    8th February 2007 - 20:42
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    Praise the Lord - we have someone posting on here something of significance in two stroke performance advancement.
    Congratulations JB on the effort , and as the quoted improvement is totally believable I feel no need whatsoever to ask to see the dyno printout.
    Now , if like some other Sin Binned member , JB had posted only an outside view and said it made 100Hp at 20,000 rpm some on here might end up getting nasty
    after 2 years of asking , and waiting , and waiting.
    Hell no, not me.
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  9. #33069
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    12th March 2010 - 16:56
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    I wonder, is piston friction that significant, in a normal engine? 14 HP worth.
    Ill bet the bugger vibrated somewhat��.

  10. #33070
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    12th February 2004 - 10:29
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    Quite possibly piston friction is significant given the documented evidence of increased horsepower when oil is added to the mixture

  11. #33071
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    3rd May 2017 - 04:03
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    creuzcopf

    Quote Originally Posted by Flettner View Post
    this is running?
    Significant
    Runned previous version. Had to remake on CNC with better precision. Finally want to rework again for longevility. Have clear vision how. My current dyno is limited to 35 hp, so I use propeller (moulinette) to estimate power and got only one HP point, not complete graph. Dont sure if stock muffler is optinal for this engine. This experimental engine made for customer who will going to order me 2-stroke star for amateur aircraft use.

    For vibration. the masses connected to connecting rod together add 37 grammes compare piston. May be in next design I'll be able decrease this difference.

    Quote Originally Posted by ceci View Post
    Congratulations on your success
    It is evident that in his design, the loss of pumping volume is less.
    The increase in power, what mystery is it due to?
    Frankly speaking I observe power increase in natural test but cannot clearly understand reasons.

  12. #33072
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    Quote Originally Posted by ceci View Post
    In the Ryger the pumping volume reduction is 58cc, 50%.
    As in this other engine

    Click image for larger version. 

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ID:	343607

    https://www.youtube.com/watch?v=TB9PGPnSEtA
    Quote Originally Posted by jbiplane View Post
    I use a bit other design. 50hp classical piston engine clone of 503cc Rotax was modified. I got 64hp at 6700 rpm without any additional modifications. 72 bore 61 stroke. Click image for larger version. 

Name:	CreizCopf.jpg 
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ID:	343606
    Great to see these experimental engines.


  13. #33073
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    20th January 2010 - 14:41
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    Quote Originally Posted by ceci View Post
    In the Ryger the pumping volume reduction is 58cc, 50%.
    As in this other engine

    https://www.youtube.com/watch?v=TB9PGPnSEtA
    Pretty sure that is actually Katinas engine.............

  14. #33074
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    4th September 2017 - 10:39
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    Quote Originally Posted by wobbly View Post
    Praise the Lord - we have someone posting on here something of significance in two stroke performance advancement.
    Congratulations JB on the effort , and as the quoted improvement is totally believable I feel no need whatsoever to ask to see the dyno printout.
    bore 72 stroke 60, the powers are from 25CV of gasgas pampera to 37CV of bultaco pursang (without exhaust valve and classic distribution). Your data is within this logic

  15. #33075
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    3rd May 2017 - 04:03
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    creuzcopf

    Quote Originally Posted by ceci View Post
    bore 72 stroke 60, the powers are from 25CV of gasgas pampera to 37CV of bultaco pursang (without exhaust valve and classic distribution). Your data is within this logic
    All experimental engines which I made were preordered by customers.
    Now customer happy with initial results and will continue experiments by himself using my "creuzcopf kits" = piston + rod + spacer.
    I will modify this kits making it cheaper and more reliable in each iteration. One day I hope to make more radical design.

    Here gas forces from one cylinder compensated by opposite one. This engine can be statically balanced to 0.

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