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  1. #91
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    Quote Originally Posted by AZMIDLYF View Post
    So nobody has played with tuners on a dyno? Or is the amount of gain just not worth the effort?
    sure they have but in a typical v outboard the chest is where I guess its lost as thats not the optimal design when you look at other multi cyl 2 strokes
    The Late Dr Blair did lots of study trying to measure the pressure waves in an engine Do you have his books?
    One shows a photo of about 50 pressure sensors in a row along the exhaust.
    Add that to a high speed datalogger and more pressure sensors in the engine and you get some info on what is happening
    Last edited by powerabout; 12-15-2017 at 01:38 AM.

  2. #92
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    Quote Originally Posted by AZMIDLYF View Post
    So nobody has played with tuners on a dyno? Or is the amount of gain just not worth the effort?
    I can't think of anyone with more to gain or money to spend than Mother Mercury herself . The 280 tuner is at the top of the heap and if you follow Dr. Blair's numbers , you will see that from the center cylinders exhaust port sleeve to the transition (adapter plate ) from rectangle to oval is the correct length for a header pipe . And the cone follows taper and length for a proper sized diffuser .
    Like I said , Fonzi era mentality , where you are forced to pick the center two holes as a bull's-eye and let the top and bottom be your "fliers" .
    I have always been more of a Jennings fan than Blair , only for the simple reason that Jennings is more practical , while Blair is more computational ...

    http://www.dragonfly75.com/motorbike/2StrokeDesign.pdf

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  4. #93
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    Thanks for the PDF Chaz.

    Theory to Practice...both have their place. You are the lucky one that gets to do both.
    The best way to predict the future is to invent it...

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  6. #94
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  8. #95
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    I'm gonna go eat breakfast ......... It's something I understand.
    Wriggleys gum makes me think of boating, "Double your engines, Double your fun"



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  10. #96
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    Now I understand why my old Bridgeport ate so much fuel and spit so much out. THE TUNER!

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  12. #97
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    Quote Originally Posted by FMP View Post
    Paul Dawson, one of my mentors from OMC Australia

  13. #98
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    Quote Originally Posted by Chaz View Post
    I can't think of anyone with more to gain or money to spend than Mother Mercury herself . The 280 tuner is at the top of the heap and if you follow Dr. Blair's numbers , you will see that from the center cylinders exhaust port sleeve to the transition (adapter plate ) from rectangle to oval is the correct length for a header pipe . And the cone follows taper and length for a proper sized diffuser .
    Like I said , Fonzi era mentality , where you are forced to pick the center two holes as a bull's-eye and let the top and bottom be your "fliers" .
    I have always been more of a Jennings fan than Blair , only for the simple reason that Jennings is more practical , while Blair is more computational ...
    I wonder what is lost doing the transitions from the chest to rectangular then back to oval like the port?

  14. #99
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    Quote Originally Posted by NICE PAIR View Post
    I'm gonna go eat breakfast ......... It's something I understand.
    Actually that fits right in to the subject .... since ya hafta break some egg's to make an omelet ...

    AZ sez :
    Theory to Practice...both have their place.
    Theory is good to keep from repeating the same mistakes over and over again . It can also be a guide down a bumpy road . However way to many get stuck in this phase (tech-lock) and never accomplish anything of their own .

    The difference between theory and reality ....

    A young boy asks his father what the difference is between the two .
    The father says I'm glad you asked , follow me and listen .

    The man ask's his wife , honey , would you sleep with Brad Pitt for 10 million dollars ?
    The wife responds , well honey , we could use the money ... so , yes I would .

    Next he asks his daughter the same thing , she quickly answers , Ohh yes , in a heartbeat .

    Then he asks his eldest son the same question .. the older boy says , that's a lot of money , yes I would .

    The father turn , looks at his youngest and says ... you see son ......
    In theory , we are multi millionaires .
    In reality , we live with two hoe's a *** ... see the difference ..

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  16. #100
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    Chaz ( my son ) also invented the internet. Not Al Gore

    Life Begins At 100 MPH

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  18. #101
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    Good morning dad ....

    I'd love to take credit for that , but if family history serves me correctly .........>
    It was my Uncle B_ _ who was instrumental in that development ..

    Chaz = been ta two company Christmas parties this weekend .
    Expensive catering , and not one *^%&% canoli' in sight ....

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  20. #102
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    Name:  worlds-largest-cannoli.jpeg
Views: 123
Size:  26.1 KB

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  22. #103
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    Now that's the place to be for a party size canoli' ....

    Chaz = thinking I'm always @ the airport when my ship comes in ...

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  24. #104
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    Quote Originally Posted by Chaz View Post
    Good morning dad ....

    I'd love to take credit for that , but if family history serves me correctly .........>
    It was my Uncle B_ _ who was instrumental in that development ..

    Chaz = been ta two company Christmas parties this weekend .
    Expensive catering , and not one *^%&% canoli' in sight ....
    Now now. Donít be modest! Uncle B__ may have helped you a little bit.

    Life Begins At 100 MPH

  25. #105
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    Quote Originally Posted by mercace View Post
    Now now. Donít be modest! Uncle B__ may have helped you a little bit.
    Then Uncle _ _ _ must have helped himself to my royalty checks as well ...

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