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Thread: air horns for my 75 stinger

  1. #11
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    Did you use rich plugs?
    Why would anybody want a Yamaha when there's an E-Tec?

  2. #12
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    Quote Originally Posted by Tim Kurcz View Post
    Jim Kinsler designed velocity stacks installed on 1BBL OMC's eliminated reversion and smoothed transitions for my 45SS, 49.9 and 56.6's. Jetting did not change.
    confirmed for UIM SE. Slotting the cowling left and right of the carbs (not legal) and jetting up after milling the head makes power.

  3. #13
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    Default Rich plugs?

    Quote Originally Posted by mayflyIII View Post
    Did you use rich plugs?
    If you're talking spark plugs, there was no change. Either BR9HS or QL77JC4.

  4. #14
    Team Member Danny Pigott's Avatar
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    Default Carb

    Mayfly, ask your dad he, knows about as much as anyone about this motor. I don't think they will help at all. If anything i would make them as short as possible just enough so you round the front of the carb. This is just my 2 cent. I have some info. about your boat i will post later i remember it when it was brand new.

  5. #15
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    Quote Originally Posted by Danny Pigott View Post
    Mayfly, ask your dad he, knows about as much as anyone about this motor. I don't think they will help at all. If anything i would make them as short as possible just enough so you round the front of the carb. This is just my 2 cent. I have some info. about your boat i will post later i remember it when it was brand new.
    he isnt to sure either
    Why would anybody want a Yamaha when there's an E-Tec?

  6. #16
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    Has anyone looked at making them 3 different lengths to compensate for the 3 different lengths of the exhaust?
    Merc 300 drag comes to mind

  7. #17
    Team Member LakeRacer99's Avatar
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    anyone selling these for 1bbl?
    Jason
    Outboard Junkie

  8. #18
    Team Member sheuninck's Avatar
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    Default made these from an air box

    wanted to round the intake opening, got 1/2 mph ... no jet change
    Attached Images Attached Images  

  9. #19
    modifiedoutboard OUTBOARDER's Avatar
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    Default Tsr software

    Quote Originally Posted by Tim Kurcz View Post
    Jim Kinsler designed velocity stacks installed on 1BBL OMC's eliminated reversion and smoothed transitions for my 45SS, 49.9 and 56.6's. Jetting did not change.
    TSR SELLS TUNED LENGTH PROGRAM.
    TUNED LENGTH IS CALCULATED FROM TIP OF REED TO END OF CARB.
    THE PROGRAM SHOWS EFFECTIVE AND PEAK RPM.
    GETTING TO CLOSE TO COWL OR SPRAY SHEILD CREATES A PROBLEM WITH REVERSION AT CERTAIN RPMS AND ALSO ALLOWS CARBS TO CROSS PULSE EACHOTHER. ON THE 45 WITH PIPE WENT UP 2 JET SIZES AND IMPROVED ACCELERATION EXITING TURNS.
    THERE ARE SOME GUYS RUNNING 6 SEC QUATERS WITH KAWI 750 TRIPLE MOTOR BIKE AND THEY SWEAR BY TUNNING FOR 2ND PULSE ON THE INTAKE.

    Also have seen same stacks keep hydro from getting on plane because of reversion and cross pulsing intake.
    ANTHONY McCULLOCH
    modifiedoutboard@hotmail.com

    Some things never change!

    They Want it cheap..............

  10. #20
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    Default Velocity stacks

    Quote Originally Posted by LakeRacer99 View Post
    anyone selling these for 1bbl?
    Yes, I sell Kinsler designed turned aluminum velocity stacks $55 each includes fasteners plus shipping. They eliminate flat spots and spitback. PM if interested.

    Tim
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