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Project I have gone over to the Dark Side ... ZXR C2 Model Stealth Edition

Discussion in 'Your 250cc Projects' started by GreyImport, Feb 5, 2014.

  1. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    I get what you're going for. I think a larger diameter pipe is what is needed. Having seen a few ram air systems, a lot of them have the following features

    Smaller initial opening, expanding just after the inlet and then back down to original size

    As much air volume as practical in the design.

    An absence of 90 degree bends, instead with shallow curves

    Feeding directly to the air box and properly sealed.
     
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  2. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    As its a 'race' bike , changes/mods can be/are experimental ... I see it as half the fun

    I just made this up as I went along ... the straight parts are just painted PVC drain pipe :D

    Maybe a 'reducer' silicone bend to take a larger filter to suck in more air initially

    silicone_hose_4_inch_reducer.jpg



    SDC10019.JPG




    Factory intake




    SDC10018.JPG

    SDC10017.JPG


    What I need is a Hypercharger! :oops:

     
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  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Not trying to ruin anyone's fun but ram air? At 100 mph you get 0.17 psi of boost.

    Rough version is
    1/2 ρv^2
    where the density ρ of dry air at sea level is about 1.25 kg / m3, and v is the speed of the wind in metres per second. This will give the answer in pascals.
    If you want to do it accurately
    https://www.grc.nasa.gov/WWW/K-12/airplane/bern.html
    Or to put it another way, on a 250 it is a complete waste of time.
     
  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Or to put it another way , when not using the side fairing on a ZXR250 , you need to get airflow directed into the airbox.
     
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  5. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Cam cover gasket isnt plug and play .... needs the notches cut in to clear the cam caps and cam chain

    R/R relocated


    SDC10024.JPG

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    SDC10027.JPG
     
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  6. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Anyone know what the brown wire is and why the "double'' plug is there

    Going by the wiring diagram "brown" is positive feed to many things ... ?

    White plug /harness goes to/comes from the ignition

    brown wire plug.jpg
     
  7. kiffsta

    kiffsta Senior Member

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    The blue wire looks like an add-on, maybe some needed a 12v feed for something , just pull it out and connect brown to brown
     
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  8. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Actually that was partly why I was asking .... I have a voltmeter tacked on so was looking for somewhere to plug it in :D

    SDC10043.JPG
     
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  9. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Pulled the end off the old muffler , cleaned her up and just need to weld them together so it can be bolted on and off .... obligatory drag strip noise

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  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Problem #639

    New very fat silicone hose is squashed up against the throttle (under the harness)


    :headbang:

    IMG_3883.JPG
     
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  11. ShaneP

    ShaneP Well-Known Member Premium Member

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    More zippie ties!
     
  12. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Yep tried that already ..... theres just not enough room
    Ill look again today as after 3 hours of pissing about I gave up last night .... as if carbys arnt hard enough to get on
     
  13. ShaneP

    ShaneP Well-Known Member Premium Member

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    Yes, the carbies are rather painful on those things... Good luck
     
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  14. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    As is the airbox .... that hose also fouls the airbox , so over the shoulder it goes
    Its just too fat .... modding things is half the fun , but theres no solutions there

    :commando:

    Take note Mr @maelstrom

    new

    IMGP0019.JPG


    old
    IMGP0027.JPG

    You have to push forward with the air box for it to 'locate' onto the crankcase breather pipe with the old soft coolant hose , so theres no chance with this fat banana
    IMGP0026.JPG


    The rest are just fine

    IMGP0030.JPG
     
  15. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Yes, knew about that. I had 3D printed my fat bananas in hard plastic and sent them to one of the members to make sure we got a design that would clear the airbox, but we were never sure about clearing the carbs. I sort of gave up because I decided it was a lot easier if I had a ZXR250 here. Never seen one though.
     
  16. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Just a rough mock up

    IMG_3898.JPG

    IMGP0038.JPG

    IMGP0040.JPG
     
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    Last edited: Nov 13, 2021
  17. ShaneP

    ShaneP Well-Known Member Premium Member

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    Ok. What is that? Nos on tap?
     
  18. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Go faster seat :crazypilot:

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  19. Andych

    Andych Moderator Staff Member Premium Member Contributing Member

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  20. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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