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Boost Bottle
How does a Boost Bottle improve performance? Air rushes thru the carb on the intake cycle. Ignition accelerates the piston down, forcing the reeds to snap shut. The momentum (inertia) of the air has to go someplace. It goes back thru the carb causing a double rich mixture. The result can be rough idle or hesitation.
Due to the high velocity of the fuel air mixture through the carb boot, we need to take advantage of this momentum/inertia energy. The Boost Bottle and tube provide storage for the fuel air mixture between carb boots. The energy (pulse) forces the pre-atomized mixture in the tube from the previous cycle into the adjoining carb boot where the reeds are just opening and ready to receive the fuel air mixture. The boost bottle and tube provide a "boost" supercharge effect to each cycle.
The boost bottle is most effective at lower and mid-range rpm, and, when you are on & off the throttle. It assists in filling the cylinder (shorter distance) for a fraction of a second until the carburetor venturi gets enough velocity to fully atomize the fuel. The advantage is that it brings up the torque and horsepower in the bottom of the rpm range, up to where the pipe(s) starts to work. There is a small benefit at high rpm's.
What Size? Singles = usually the CC of one cylinder or larger. 700cc Twins = 300cc boost bottle. 700cc Triples = 225cc.
Variables: Engine CC's, Carb Size, RPM below pipe, Number of cylinders. Large carbs like larger bottles/tubes. Triples like smaller due to less time between pulses.
I use the TSR computer software to calculate the Boost Bottle for a specific set up.
Yes they work, when the size is right, the inertia of the air is stored like a spring in the boost bottle to help charge the next cycle. Try tuning a Yamaha Phazer without it's boost bottle!
Power valve engines may not have similar performance gains because the valves will keep the bottom end crisp. Testing w/ powervalves will probably show gains off idle and low bottom end. Is it worth it?? That depends on what you are willing to pay for some torque and a couple of horses!
促进瓶
怎么做助力瓶改进表现? 空气通过carb在进水闸周期冲。 燃烧加速活塞下来,强迫芦苇攫取关闭。 动量(惯性)的空气必须去在某处。 它审阅导致一个双重富有的混合物的carb。 结果可以是概略的懒惰或犹豫。
由于高速燃料空气混合物通过carb起动,我们需要利用这动量或惯性能量。 助力瓶和管提供燃料空气混合物的存贮在carb起动之间。 能量(脉冲)在管强迫前被雾化的混合物从早先周期入毗邻carb起动,芦苇是正义开头并且准备接受燃料空气混合物。 助力瓶和管提供一个“助力”充填强化药柱作用给每个周期。
当您是在&节流孔时,助力瓶是最有效的在更低和中等长度范围rpm,和。 它协助填装圆筒(更短的距离)为一转眼工夫,直到气化器文丘里管得到足够的速度充分地雾化燃料。 好处是它提出扭矩,并且马力在rpm底部排列,由决定管子起动运转的地方。 有一个小好处在高rpm's。
什么大小? 选拔=通常CC一个圆筒或大。 700cc孪生= 300cc助力瓶。 700cc成三倍= 225cc。
可变物: 引擎CC'S, Carb大小, RPM在管子之下,圆筒的数字。 大carbs喜欢更大的瓶或管。 三倍喜欢更小由于脉冲之间的较少时间。
我使用TSR计算机软件计算助力瓶为一个具体设定。
是他们运作,当大小是不错时,空气的惯性被存放象春天在助力瓶帮助充电下个周期。 调整Yamaha Phazer的尝试没有它是助力瓶!
因为阀门将保持底端酥脆,力量阀门引擎可能不有相似的表现获取。 试验与powervalves大概将证明获取无所事事和低底端。 它相当它价值? ? 那依靠什么您是愿意支付一些扭矩和两三匹马!
[ 本帖最後由 179283820 於 2008年8月8日 11:29 AM 編輯 ] |
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