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cb750 aftermarket airbox

This is a discussion on cb750 aftermarket airbox within the General forums, part of the Caferacer.net Forums category; Anybody have any experience with these? Air Boxes Thinking about one in the future and wanting to get some input from those in the know....

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  1. #1
    Senior Member s10hornet's Avatar
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    cb750 aftermarket airbox

    Anybody have any experience with these?
    Air Boxes

    Thinking about one in the future and wanting to get some input from those in the know.

  2. #2
    Senior Member jaguar's Avatar
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    Basically a copy of the old school chopper airboxes.

    Should work better then pods.
    I am Derby\'s Bitch


    Some times things come around that are so singularly inept it gives you a whole new appreciation for the ept

  3. #3
    Senior Member CaTacL1sm's Avatar
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    Quote Originally Posted by jaguar View Post
    Basically a copy of the old school chopper airboxes.
    Quote Originally Posted by jaguar View Post

    Should work better then pods.
    If you were to take this and cover up all the openings except for a say, 4" diameter hole in the top, would it work better?
    Quote Originally Posted by alwhite00 View Post
    Fuck all of you guys. Get into your little circle jerk and have fun. Thought this may be a pretty cool message board but damn, you guys are assholes.

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  5. #4
    Senior Member jaguar's Avatar
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    Unsure what you mean.
    I am Derby\'s Bitch


    Some times things come around that are so singularly inept it gives you a whole new appreciation for the ept

  6. #5
    Senior Member Jruff5585's Avatar
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    it would work better if you could adapt the factory velocity stacks to it that are in your stock air box, if you are using CV carbs
    Last edited by Jruff5585; 07-21-2015 at 01:18 PM.

  7. #6
    Senior Member CaTacL1sm's Avatar
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    Quote Originally Posted by jaguar View Post
    Unsure what you mean.

    basically closing up the box to better replicate the stock airbox and creating a stable atmopshere within. the way this breadbox air filter is now, don't all the holes create uneven air flow into the carburetors?
    Quote Originally Posted by alwhite00 View Post
    Fuck all of you guys. Get into your little circle jerk and have fun. Thought this may be a pretty cool message board but damn, you guys are assholes.

  8. #7
    Senior Member jaguar's Avatar
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    Interesting point.
    I am Derby\'s Bitch


    Some times things come around that are so singularly inept it gives you a whole new appreciation for the ept

  9. #8
    Senior Member YucA's Avatar
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    Quote Originally Posted by CaTacL1sm View Post
    basically closing up the box to better replicate the stock airbox and creating a stable atmopshere within. the way this breadbox air filter is now, don't all the holes create uneven air flow into the carburetors?
    I think you would need to do a little math on the volumetric flow of each carb, and then see what size plenum they would need with a corresponding sized opening for it to be really worthwhile. The nice thing about that box having mesh along its entire circumference is that it should keep the air pressure relatively equal between bellmouths, have little to no restriction, as well as "dead" air so there is minimal disruption of the air flowing through the stacks.

    Then you have to deal with details like how much space should there be between the bellmouth of the stack and the front of the airbox. That has a huge effect to airflow as well...

    On a side note, I don't get how these guys sell their individual stacks with the mesh filter on the inside. Way to reverse the effect a velocity stack is supposed to create in the first place! Talk about selling hipster bullshit.

  10. #9
    Banned Witworth's Avatar
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    Fit K&N pods or a stock airbox.

    The steal dragging ones look far too small in volume to work very well. They only built them for looks, period.

    If old chopper airboxes worked better than pods fossil superbike racers would be using them on race tracks now. They ain't.

    Danger, is my business."

  11. #10
    Senior Member Cyorg's Avatar
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    The first generation SOHC CB750 carbs are just as fussy when it comes to velocity stacks. Whether or not this setup would work very well is partly dependant upon how well those velocity stacks replicate the stock ones. If they are much different, then (as already mentioned) you would be better off swapping the stock stacks into this air box assuming they will fit and there is sufficient clearance between the mouth of the stack and the back of the air box. It might look better, but you are most likely better off sticking with the stock box.
    Last edited by Cyorg; 07-21-2015 at 05:15 PM.
    "Non urinat in ventum"

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