CB desert sled

Discussion in 'Some Assembly Required' started by Luke, Sep 6, 2012.

  1. jesusgatos

    jesusgatos fishing with dynamite

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    + a 20% off coupon and they're going to end up owing you money. haha.
  2. MortimerSickle

    MortimerSickle Semi-Adventurer

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    That would be cool, but they will take only one coupon per day- even if you are buying more than one item.
  3. LC Garage

    LC Garage On Any Sunday

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    Send the coupon, we will use it on our new press! Went to HF at lunch to look at the press and ended up buying 4 items! :lol3
  4. MortimerSickle

    MortimerSickle Semi-Adventurer

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    PM addy? :ear
  5. LC Garage

    LC Garage On Any Sunday

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    sent! :D
  6. oregoncoast

    oregoncoast Racing Like a Noob

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    That place is going to be like crack to a crackhead for you Rick. You better start leaving you're debit card at home :deal
  7. Loud Al

    Loud Al .

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    Right across the street from work, this could get expensive :rofl even at those prices :evil
  8. MortimerSickle

    MortimerSickle Semi-Adventurer

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    Just remember, if you don't need it today, never buy anything at HB that isn't on sale, because it will be within two weeks. :D
  9. Low594

    Low594 Adventuring Creep

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    And stay far away from the 4.5" cutoff saws with a switch, only use the ones with the DeadMan Paddle! I had an incident (read poor judgement) and one got away from me and ran down my leg! I'm just glad it only had the Brillo Pad head on it and not the cut-off wheel!
  10. Luke

    Luke GPoET&P

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    Rick did some brazing this evening. You know it's serious work when we're drinking beer again.

    [​IMG]



    [​IMG]

    The airbox is more of a manifold. There is one inlet that an air filter will be clamped to and 4 outlets that go to the individual carbs. Here's the progress so far:
    [​IMG]

    [​IMG]


    The inlet still needs to be brazed in and then the two parts brazed together. And yes, those tabs on the side will either be folded up or cut off.

    No pictures, but the little bender did a lot better on 22ga than 16ga. :lol3 Unfortunately it's still a bit wonky from yesterday's abuse.
  11. Mr. Fisherman

    Mr. Fisherman PROUD 2B Riff Raff!

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    Uhm, shouldn't the goesinta be equal or greater than the goesoutta? Cough Cough...
  12. Luke

    Luke GPoET&P

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    On the factory bikes I've seen some are, some aren't.

    Why?
  13. Mr. Fisherman

    Mr. Fisherman PROUD 2B Riff Raff!

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    Thinking I have seen lots of folks open up an air box and the exhaust to get better flow... If the filtered inlet is too small couldn't it choke those 4 carbs when you are stroking across the playa at WOT? Or maybe you could just use smaller diameter exhaust pipes :D

    It just looked like those 4 carbs might want to suck more air than can pass through that single smallish inlet at WOT. That said I am not an engineer nor do I play one on tv
    :lol3 :1drink
  14. MortimerSickle

    MortimerSickle Semi-Adventurer

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    On the other hand, only one carb is drawing air at any given time, no?
  15. Luke

    Luke GPoET&P

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    They're about 1" carbs, and the inlet is 2" pipe so the area is about the same.

    According to a couple of online things, the inlet should flow enough air for a bit under 240hp.


    Yup. 4 cylinters, 4 stroke. Unless I put in a really goofy camshaft. :D
  16. MortimerSickle

    MortimerSickle Semi-Adventurer

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    Cool, you are going to need a lot of tires. :D
  17. Luke

    Luke GPoET&P

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    And three or four more motors.
  18. Low594

    Low594 Adventuring Creep

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    Or that BIG turbo! :evil
  19. MortimerSickle

    MortimerSickle Semi-Adventurer

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    But then, once you get more air going in....

    <iframe width="420" height="315" src="http://www.youtube.com/embed/rgNkw_fNb-Q" frameborder="0" allowfullscreen></iframe>
  20. kellymac530

    kellymac530 motorcycle addict

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    :rofl:rofl:rofl


    2 things to think about on the inlet/outlet size is that a carburetor works off of flow of air...which is created by the vacum of the cylinder on INTAKE stroke. I believe that motor fires in 4 fires, not 2, so only one induction at a time. The inlet being 2" and each carb outlet being 1" means it never needs more than 1" of air at a time.

    The second thing, which kind of offsets that, is that you DO want a larger and unrestricted flow before the carb...think of a velocity stack. That is import at WOT where a smooth, high flow is key.

    So a balance of the 2 is important and that is calcuable.

    People need to remember that in cylindrycal shapes doubling the diameter is not just twice as much....Pi x r2

    I do not know the formula for his optimal inlet size, but he WELL MAY be just fine.