Boost Bottle is or isn't?

Discussion in '2-Stroke Engines' started by geebt48cc, Aug 3, 2010.

  1. geebt48cc

    geebt48cc Member

    Well, got here today. Looking forward to seeing for myself if this boost bottle stuff is for real. I hear they don't work, and I hear they do.:cool2: So, I've yet to try it, but will in a few days?!!~

    ........Any advice putting it on this Skyhawk 48cc?

  2. GearNut

    GearNut Active Member

    It has no instructions?
  3. highplainsdrifter

    highplainsdrifter New Member

    Im very interested in these boost bottle kits. How is it working out for you? Did you get any increased power?
  4. Fabian

    Fabian Well-Known Member

    Don't waste your time with a boost bottle, for it won't give anything except lightening your wallet.

    If wishing to install a device that "will" give an improvement, order a reed valve intake from Rock Solid Engines.
  5. HeadSmess

    HeadSmess Well-Known Member

    boost bottles are best suited for piston ported engines, such as the HT.

    boost bottles are a resonant cavity, that nullifies the effect of a fixed length intake tube in conjunction with a fixed port timing.

    the size of the bottle itself is critical. the size of the connector is critical. length of connection tube. placement of the tapping point on the inlet manifold. and all that changes with air temp/pressure etc.

    basically, unless you spend some serious time calculating then fine tuning, the benefits just arent worth it.

    look into other areas that can be fixed with simple handtools first ;)
  6. highplainsdrifter

    highplainsdrifter New Member

    Thanks for your reply Fabian, Ive heard more bad than good on the boost bottle kits. I was going to fabricate one..... but sounds like its not really worth the time. Also I checked out Rock Solid Engines, and their products look nicely made! Have you used these reed valve intakes? How did it work out for ya?
  7. gothicguy64

    gothicguy64 Member

    my 48 cc rse doesn't need a reed setup mind u its mostly all billet lol

    piston was ceramic coated
    hed is billet
    barrel is fully ported etc
    clutch arm is billet so is the clutch cover
    and looky here I see a sbp expansion on my shelf an a sbp shiftkit hd 1 im yet to fit
    im tied of passing buses an cars at 65 kph on a 60 kph rd
    an besides I want more than 63 k per 1 lt of bp 98 oct fuel ...(in nz its over 99)
    I cant wait for jan 2014 and my new improved (GARM) ..that's my bikes name ...its really merida matts 20 in black an yucky green frame is a 20 inch ...
    im a goth for ****s sake
    sittin up on a bike rack is my axle driven rse bike I killed but motor has only 3500 k so into GARM goes the old rse 48cc an when I get around to it ill get 1 off jaguars cdi.s
    then no need for reed , boost ,,,maybe sum no2 on with the sbp exhaust that's been setup for my 48cc motor by me ..finally the sbp shifter with a 11 ..
  8. Fabian

    Fabian Well-Known Member

    :idea: You just need to correctly calibrate your speedo. That will reduce your top speed by around 20 kph
  9. Fabian

    Fabian Well-Known Member

    Do a Google search for "Rock Solid Engines - Reed Valve Installation for 2-stroke 50cc, 60cc, 66cc 70cc & 80cc Engines"

    and a Google search for "Walbro Style Carburettor for Rock Solid Engines Reed Valve Intake"
  10. jaguar

    jaguar Well-Known Member

    I agree with headsmess. they can work good if designed right. Most all the ones sold do not have enough passage flow area to work right. You need to make your own.
    Actually they are an improvization for engines without enough room for an intake extension which is the better of the two designs.
  11. grinningremlin

    grinningremlin Active Member

    This may be apples/oranges here, but I have an ADA juicebox (mini boost?) mounted to my Tanaka 40cc.I can't say it made any difference in speed, BUT IT DID make the power more consistent throughout throttle, the engine runs better in general, idles lower, and made the intake so much quieter.