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  1. #1
    Join Date
    Oct 2011
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    Picture Butte, Alberta
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    464

    Default 2 use a boost bottle, or not?

    I have been looking into the actual advantages, and/or disadvantages of running with a boost bottle?

    Some of the info, and discussions I found on this subject weren't very helpful.

    From what I have gathered a boost bottle can help throttle response into the powerband, and can be a bandaid for poor jetting?

    Of course a lot people said that the engine looses topend with the boost bottle, and remove them.

    So I have to wonder? If the boost bottle is a good bandaid for jetting issues, and you ride on trails with some extreme altitude changes would it not be better to run it, and not have to stop, and change you jets every 20 minutes??

    So in retrospective, I'm looking for some feedback.. What do others think of boost bottles?

  2. #2
    Join Date
    Apr 2005
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    Default

    you should not have to change your jetting with an altitude change unless it is very drastic and you will be riding each altitude for many many hours. get it jetted right and you will be fine. boost bottle = waste of money and less hp $.02


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  3. #3
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    Nov 2007
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    RENO_NOT*CAL
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    Default

    there a waste, don't even bother with a boost bottle

  4. #4

    Default

    IMO they are just another place for a leak to start, i dont even use the manifolds with the boost bottle inlet, i get rid of all of that, no leaks for me
    Hotwheels Killer!!!




  5. #5
    Join Date
    Sep 2008
    Location
    Auburn WA
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    1,751

    Default

    Ah man I really wanted one LOL.

    Can't see him but there is a guy on a banshee under all that roost.

  6. #6
    Join Date
    May 2005
    Location
    Jersey
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    Default

    I agree its a gimmick, i bought a the boss intake that eliminates the need for the crossover tube or boost bottle... the cross over is built in... i think the boost bottle in theory was supposed to increase volume but i dont think there have been any studies proving it. You should only need to change your jetting if your altitude changes drasticaly like 2000ft or more would require a change. remember towards sea level and your need to go rich, increase in elevation you need to lean
    Hieneken= Happieness
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  7. #7
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    Apr 2005
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    Default

    Quote Originally Posted by Derick View Post
    Ah man I really wanted one LOL.
    no you didn't!




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  8. #8
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    Quote Originally Posted by Derick View Post
    Ah man I really wanted one LOL.
    hahahah i have one ill give ya, throw some rj stickers on it and its garanteed for 15 hp gain
    Hieneken= Happieness
    kidney stones blow

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  9. #9
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    Apr 2005
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    Default

    Quote Originally Posted by Morph0906 View Post
    I agree its a gimmick, i bought a the boss intake that eliminates the need for the crossover tube or boost bottle... the cross over is built in... i think the boost bottle in theory was supposed to increase volume but i dont think there have been any studies proving it. You should only need to change your jetting if your altitude changes drasticaly like 2000ft or more would require a change. remember towards sea level and your need to go rich, increase in elevation you need to lean
    it does increase the volume. but if you think about it how much will that help? the only time there is "dwell" so to speak is at a very low rpm, maybe not even then. and when you gas it, it can get a quick burst of air without having to be sucked through the filters. after that split second it is useless. whats it going to do then but cause intake turbulence and a loss of hp IMO.

    junk!


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  10. #10
    Join Date
    Oct 2011
    Location
    Picture Butte, Alberta
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    Default

    Quote Originally Posted by StrokedTater View Post
    you should not have to change your jetting with an altitude change unless it is very drastic and you will be riding each altitude for many many hours. get it jetted right and you will be fine. boost bottle = waste of money and less hp $.02
    That's good to know. Where I ride you can go up, and down within a 1000ft altitude change. I never thought about having to change my jets, but we go out for 4 hours a trip.. I have always wondered about leaning it out, and running to hot? But it makes sense to me that if you get back into the altitude your jetted for right away, it should have no ill affects..

    Quote Originally Posted by RJATV View Post
    IMO they are just another place for a leak to start, i dont even use the manifolds with the boost bottle inlet, i get rid of all of that, no leaks for me
    Well the motor that I'm speaking of is a 83' Yamaha 490. It has a stock boost bottle, and seals well. I don't even know if there's an intake for the older 490's, that doesn't have the provision for the hose??

    I'm not even really sure I understand what the boost bottle does? I know it sucks up unburnt fuel (spitback), and it gets sucked back into the mixture under heavy throttle.
    I don't understand where you loose power in this?