Boost bottles

**Norman** · #11 (**permalink**) 04-24-2008, 06:32 PM

I've been down the boost bootle trail myself. Did a lot of testing, and all in all its a waste of money you want to run one go ahead I'm not. I don't need them my bike is fast enough actually faster without one and it will ilde great. The guys on another forum think they are great I think they suck. My 2-cents.`

quarkdude · #12 (**permalink**) 04-24-2008, 06:50 PM

Hello Norman,
Sorry the boost bottle's didn't work on your setup. You are the first bike motorist that I have heard that said it didn't work, interesting. What altitude are you at? Is your jetting set right? Do you have a free flow air cleaner, modified exhaust. These things do contribute to the level of performance gain using a boost bottle. Do you have a picture of your setup? I'd like to check it out.
.......Thanks, quarkdude

**Norman** · #13 (**permalink**) 04-24-2008, 07:01 PM

I think we banged heads on a different forum. you can read my posts here and on the other forum for all the info you want about it and my feeling on these boost bottles.
Quarkdude for all of your questions look on this forum I have pictures of the bikes and pictures of the bottles. I live at 3200 ft. I built an adjustable boost bottle and I also cc'd the fixed ones I put alot of work into them and now I'm done with them I don't need one on my bike. I'm glad they work for you. The problems I found they DO cause are not worth the slight low end extra you talk about.

**Bikeguy Joe** · #14 (**permalink**) 04-24-2008, 07:36 PM

Yeah, but if the charge has nowhere to go and wants to "back up" then where is the air that's in the boost bottle, and what is it doing? Does the boost bottle have a one way physics defeating checkvalve or something?

**Bikeguy Joe** · #15 (**permalink**) 04-24-2008, 07:39 PM

Quote:

Originally Posted by quarkdude

Hello Norman,
Sorry the boost bottle's didn't work on your setup. You are the first bike motorist that I have heard that said it didn't work, interesting. What altitude are you at? Is your jetting set right? Do you have a free flow air cleaner, modified exhaust. These things do contribute to the level of performance gain using a boost bottle. Do you have a picture of your setup? I'd like to check it out.
.......Thanks, quarkdude

Now I'm starting to get it...you optimize your carb and spark, air cleaner, and exhaust and that's where the boost bottle gets it's performance from...

**Bikeguy Joe** · #16 (**permalink**) 04-24-2008, 07:40 PM

Are there verifiable, real world dyno figures to prove that a boost bottle ALONE will show horsepower or torque improvements?

If they work so well, why do no manufacturer's use them?

hotrodseanxx · #17 (**permalink**) 04-24-2008, 11:27 PM

just from reading everything the idea of the boost bottle could work...BUT it would need two hoses and in and out... because it is saying it takes the air in and then when more are is pushed out the air already in is forced into the engine, but if there is the same amount of air going in as out wouldn't it cancle each other out. Basically is sounds like the idea of a turbo (not a supercharger since s/c is belt driven) where it take the air pushed out from the exhaust and force it back into the intake.... idk sounds plausible but i think it would need dual tubes....

**Bikeguy Joe** · #18 (**permalink**) 04-25-2008, 07:03 AM

Not to mention air isn't going to make a 90 degree turn and go into a closed end bottle when it would just go straight and out the open carb mouth!

Autocycler · #19 (**permalink**) 04-25-2008, 09:35 AM

Quote:

Originally Posted by Bikeguy Joe

Are there verifiable, real world dyno figures to prove that a boost bottle ALONE will show horsepower or torque improvements?

If they work so well, why do no manufacturer's use them?

Actually, boost bottles have been/are used by some manufacturers on motocross bikes. I'm not sure if new Motocross bikes have them, but they were factory equipped on Yamahas, and two of my KTMs from the mid 90's had them.

The dyno testing idea is a good one...certainly would provide some solid evidence one way or the other. Does anyone on the forum have acces to a dyno? Test the same bike(s) with and without their boost bottles in place.

deacon · #20 (**permalink**) 04-25-2008, 10:19 AM

God it's good to be old and infirmed lol... My need for speed has been gone for at least ten years.