How does a Boost Bottle work?

[greenevegiebeast]

asa newbe to motored bikes, would some one please tell me, how the boost bottle works. if it is not nox:???:
the only two cycle motors i have worked on before were detroit deisels with a turbo supercharger set up. thers a little difrance between the two.

 

[Phil_McCracken]

Boost bottles are funny things, some say they work, some don't, its job is apparently to stop fuel/air mix from passing the main jet twice.
When the motor is off pulse (more typical with a piston port timed motor than a reed motor) it will push some fuel back through the carb and cause a over rich condition accross the main jet.
Heaps of info on the net, do a google search, heres one link

http://www.eindiancompanies.com/images/resonator.htm

 

[misteright1_99]

Or here............
http://www.motoredbikes.com/showthread.php?t=6603&highlight=boost+bottle

Thanks for that link Phil. I bought my CDI for my last Yamaha Daytona from him. I lost the name and never did tell him how great it worked........

http://www.eindiancompanies.com/images/resonator.htm

 

[happycheapskate]

Has anybody used a Briggs and stratton butterfly valve carb or pull valve carb on a grubee kit? (like the 3.5 or 4.5 horse lawnmower carb esp with auto choke, or the 2.5 edger carb with slide choke)

 

[cabinfever1977]

The place that sells the boost bottle, boost you money from your pocket,just send me the money and i'll tell you that your bike is faster.

We all know that the gas/oil blow back will go out the intake threw the filter and not up a tiny hole on the top of intake into a boost bottle and out again.

 

[motorpsycho]

If there is such a thing in the m.b. world as snake oil...a boost bottle would be it.
reminds me of the guys in the old west with their travellin' medicine wagons.
"sure it works...trust me".

 

[give me vtec]

I bought one... let me say first hand. THEY DO NOT WORK!!!!

I tried for about a day in every possible configuration and couldnt get anything but less performance. It made my engine run like cr@p.

Save your money...

 

[happycheapskate]

I'm inclined to think that it can work and very well, depending on whether you tune the carb after installation, and whether there is enough vaccuum during engine operation to make the bottle resonate (draw in fluid).

If it made your engine "run like ****" I bet you either a. blocked or interfered with the intake very substantially (choking the engine all the time), or b. did not adjust the carb that was wasting a little gas, therefore flooding the engine after installation.

If you thread something or weld something deep into the intake tube, esp near the engine or the back of the carb (the stock tubes are short!), you will choke the life out of the engine.

If you just extended the "manifold" for the intake (maybe by a longer tube, or adding a rubber hose and a plastic/metal tube) by a few inches, it would probably make a huge difference, and by changing the length or the bend, you could probably nurture a "sweet spot" on the engine's RPM range.

I'm going to try making a boost bottle from a NOS energy drink bottle. I need a spare intake tube though.

 

[bganger43]

bob to forum

they do work if you have enough info to set up for them properly

 

[give me vtec]

I'm inclined to think that it can work and very well, depending on whether you tune the carb after installation, and whether there is enough vaccuum during engine operation to make the bottle resonate (draw in fluid).

If it made your engine "run like ****" I bet you either a. blocked or interfered with the intake very substantially (choking the engine all the time), or b. did not adjust the carb that was wasting a little gas, therefore flooding the engine after installation.

If you thread something or weld something deep into the intake tube, esp near the engine or the back of the carb (the stock tubes are short!), you will choke the life out of the engine.

If you just extended the "manifold" for the intake (maybe by a longer tube, or adding a rubber hose and a plastic/metal tube) by a few inches, it would probably make a huge difference, and by changing the length or the bend, you could probably nurture a "sweet spot" on the engine's RPM range.

I'm going to try making a boost bottle from a NOS energy drink bottle. I need a spare intake tube though.

Yeah right... "sweet spot" my foot. If a longer intake Mani makes all The difference, then why does boost bottle industries sell a pre threaded intake tube that is exactly the same as the stock tube? You would think they would know best on how to make their product work... And offer the so called "sweet spot" tube to people willing to pay for it. How did that nos drink boost bottle work out???

Bob... If you can make on of these things work, then prove it. Install one in working condition and post a vid. If not stop telling people "they work, you just need more info".... Because tO the best of my knowledge nobody reputable has made one work. This is the second thread you mention this within your first two posts, very strange for a noob to promo a specific failed product twice in their first two posts. They usually ask a question like "what engine should I get, or my clutch/carb doesn't work". Do you work for boost bottle industries or something?

For everybody else... IF you think you can make it work, i have one sitting in my garage right now, pay for shipping and it's yours. You can get more performance for less money by milling your head down with some files and sandpaper.