I can guarantee you that he will agree with my assessment of them installed on a basic China Girl motor motorised bicycle...Yamaha originally designed the first one back in 1980 for their full fledged motorcycle designed engines...DAMIEN
Building A Boost Bottle From A Gatorade Bottle And 4$ At The Hardware Store
- Thread starter CrispyLeaves98
- Start date
Street Ryderz
Well-Known Member
Boost bottles are a joke, Just like the power bands and muffler bearings Wrench has shown that vendors will gladly sell to any unknowing just trying to make a buck!
Boost bottles when the whole system is volumetrically correct, meaning that the bottle, line and fittings and also the total length are matched to the displacement of the engine and then tuned still add no power gain all they do is take the reversion of the intake pulse and give it somewhere to go rather than be spit back out the carb keeping the air filter cleaner longer, then on the next intake pulse it pulls from the bottle any charge (a/f mixture) that hasn't neutralized with it, this is helping very little and only applies to the lowest rpm usually just off idle since it's a resonant system and as rpm increase it becomes too slow or miss timed to do anything!
Yamaha tried this system with a tuned airbox and found it was unnecessary with little to no gains and scrapped the idea, again if this were a viable system all the manufactures would use it, they spend millions of dollars doing R and D with decades of engineering behind them, they know what works and doesn't and most importantly WHY !
A properly tuned carb and setup engine will give you all it has to give every time and be predictable in doing so, it's far better to have a reliable engine than one that works well only in certain areas and stumbles in others, and if you want to add mods do one thing at a time so that you can go back easily and know what just failed.
Boost bottles when the whole system is volumetrically correct, meaning that the bottle, line and fittings and also the total length are matched to the displacement of the engine and then tuned still add no power gain all they do is take the reversion of the intake pulse and give it somewhere to go rather than be spit back out the carb keeping the air filter cleaner longer, then on the next intake pulse it pulls from the bottle any charge (a/f mixture) that hasn't neutralized with it, this is helping very little and only applies to the lowest rpm usually just off idle since it's a resonant system and as rpm increase it becomes too slow or miss timed to do anything!
Yamaha tried this system with a tuned airbox and found it was unnecessary with little to no gains and scrapped the idea, again if this were a viable system all the manufactures would use it, they spend millions of dollars doing R and D with decades of engineering behind them, they know what works and doesn't and most importantly WHY !
A properly tuned carb and setup engine will give you all it has to give every time and be predictable in doing so, it's far better to have a reliable engine than one that works well only in certain areas and stumbles in others, and if you want to add mods do one thing at a time so that you can go back easily and know what just failed.
Karl Snarl
Well-Known Member
it's to big. won't work right. It has to be tuned to your engine. You need to do some math to get the right size chamber and the tubing plays a big role too. Small tubing is a higher freq than fat tubing. Different lengths etc, do different things to the tuning. They are used mainly( in my experience, and built right into the intake design) to gain in the low end where it stumbles on the transition. You can tune them to different rpms though. Think of your engine as a musical wind instrument. That's what it is. It is called tuning.
CrispyLeaves98
Well-Known Member
Too confusing. I really do appreciate the help but this is just a fun stupid thingy Im doing
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