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Thread: the clean two-stroke thread

  1. #481
    Join Date
    1st May 2016 - 13:54
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    Vintage 2T
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    Brisbane
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    Interesting presentation by Stihl on use of E-fuels in IC small engines. (DI2S - Session 1.4)

    A battery leaf blower produces more CO2 emissions PRIOR to use, than the IC/E-fuel version throughout it's entire use/lifecycle.

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    E-Fuels are the non-fossil fuels: Alcohols, Bi-diesels, synthetic gasoline, etc.

  2. #482
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    4th December 2011 - 22:52
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    Yamaha XJ750 1982
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    If you are on LinkedInn:

    https://www.linkedin.com/groups/4395138/

  3. #483
    Join Date
    18th March 2012 - 08:35
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    Homebuilt chassi, Kawasaki 212cc
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    Sweden
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    660
    A high performance injected project running on e85 and castorbased oil:

    Teaserclip of build series:
    Just released part II yesterday.


  4. #484
    Join Date
    22nd November 2013 - 16:32
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    STRIKE trike & KTM300 EXC TPI
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    Perth, Western Australia
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    878
    FREE to good (or bad) home.

    In the process of tidying up, I have this Piaggio 50 cc DI cylinder head. It features a compressor which drew in carb'd or EFI'd fuel mix.

    Lots of info, here's just one for example: https://modernvespa.com/forum/topic87835

    Message me if interested. You pay freight of course.

    Hate to see it scrapped.


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    "Success is the ability to go from one failure to another with no loss of enthusiasm.”

  5. #485
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    4th September 2017 - 10:39
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    Daelim besbi 2008
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    Quote Originally Posted by ken seeber View Post
    FREE to good (or bad) home.

    In the process of tidying up, I have this Piaggio 50 cc DI cylinder head. It features a compressor which drew in carb'd or EFI'd fuel mix.

    Lots of info, here's just one for example: https://modernvespa.com/forum/topic87835

    Message me if interested. You pay freight of course.

    Hate to see it scrapped.


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    It's like a mechanical DITECH.
    And how does it get from Italy to Orvital in Australia?

  6. #486
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    22nd November 2013 - 16:32
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    Quote Originally Posted by ceci View Post
    It's like a mechanical DITECH.
    And how does it get from Italy to Orvital in Australia?
    Ceci, I think it came to Orbital when we were doing the DiTech application work for Piaggio. The guy who came up with this was Dr Marco Nuti of Piaggio. In this case the compressor was fuelled with an EFI injector.

    I personally loved the concept and in fact made up a unit, using an inverted OS model plane engine, 1:1 chain driven from the crank, using a simple spray bar carb. On reflection, this was 20+ years ago.

    As usual, I didn't have a dyno to prove it on, but it certainly could be made to idle very smoothly.

    Just don't know why Fletto hasn't tried this: he just loves an engine with a small crank and piston on top of the main cylinder.

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    "Success is the ability to go from one failure to another with no loss of enthusiasm.”

  7. #487
    Join Date
    18th March 2004 - 17:38
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    1971 suzuki T350R,1980 suzuki GSX1100
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    Quote Originally Posted by ken seeber View Post
    Ceci, I think it came to Orbital when we were doing the DiTech application work for Piaggio. The guy who came up with this was Dr Marco Nuti of Piaggio. In this case the compressor was fuelled with an EFI injector.

    I personally loved the concept and in fact made up a unit, using an inverted OS model plane engine, 1:1 chain driven from the crank, using a simple spray bar carb. On reflection, this was 20+ years ago.

    As usual, I didn't have a dyno to prove it on, but it certainly could be made to idle very smoothly.

    Just don't know why Fletto hasn't tried this: he just loves an engine with a small crank and piston on top of the main cylinder.

    Click image for larger version. 

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    I love it, I was told a number of times when I was a young fella a IC engine was just a fuel/air pump and here you are using that model plane engine as a pump!
    Compare Pornography now to 50 years ago.
    Then extrapolate 50 years into the future.
    . . . That shit's Nasty.

  8. #488
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    12th March 2010 - 16:56
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    TT500 F9 Kawasaki EFI
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    Hamilton New Zealand
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    This will be going on the AG soon
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  9. #489
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    4th September 2017 - 10:39
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    Quote Originally Posted by ken seeber View Post
    Ceci, I think it came to Orbital when we were doing the DiTech application work for Piaggio. The guy who came up with this was Dr Marco Nuti of Piaggio. In this case the compressor was fuelled with an EFI injector.

    I personally loved the concept and in fact made up a unit, using an inverted OS model plane engine, 1:1 chain driven from the crank, using a simple spray bar carb. On reflection, this was 20+ years ago.

    Click image for larger version. 

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    Thank you very much for clarifying my doubt, Dr. Marco Nuti from Piaggio you have good publications in which you discover Piaggio's attempts to obtain a clean 2S engine (a vespa 200 with mechanical injection, another with the IAPAC system "by Pierre Duret") .
    And the derbi TSI system also uses a compressor (in this case parallel to the cylinder) you have something
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  10. #490
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    7th October 2015 - 07:49
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    Lithuania
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    Methanol fueled two stroke ship engines testing.

    https://www.man-es.com/discover/methanol-fueled-ships

  11. #491
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    18th March 2012 - 08:35
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    Homebuilt chassi, Kawasaki 212cc
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    Just putting this here as a teaser of upcoming video, keep an eye out =)

    https://youtube.com/shorts/NwVbYRizx...UzVHtFz7utnIC4

  12. #492
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    8th November 2015 - 17:28
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    1991 MZ 301
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    Denmark
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    Better Moped and Lawn Mower two stroke engine in comparison sizewise

    Velosolexes were good for 500 liter of fuel so not much money saved by using 35% less,but much cleaner exhaust

    https://imgur.com/a/6xj5esC

    There was a picture of an austrian proposal for a clean,lean,wet sump,sidevalved two-stroke twin on the web once.
    https://proxy.imagearchive.com/934/9...4ebae1156a.png

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