drpullockaran,
Thanks for providing wonderful link.Here my 2 cents.
It essentially describes the mechanism of air intake systems.Air intake system is designed with each vehicle taking into consideration many aspects like noise suppression,better optimised flow at major rpm range and so on.So basically its a calculated technical effort aiding to the better performance of vehicle.So in racing bikes if one uses another filter mechanism then it can dampen engine performance ar higher rpm.Thats their concern.
Link says we have resonator in air intake system.So we have in our cars.Whats basically it is? and how it really help our car.This air resonator basically works as a Helmholtz Resonator. Helmholtz Resonator - DiracDelta Science & Engineering Encyclopedia
Helmholtz resonator can be designed to reduce noise as well as improve torque.In most street cars we get benefits of both.It can be designed specifically to improve mid range drivability just like free flow exhaust.
This box also eliminates road dust and debris.
The design of resonator box is made in such a way to attenuate perticuler resonance frequency range during suction stroke at perticuler rpm range.It aids suppressing induction noise as well as smoothen out induction waves.So basically we get lesser induction noise at very high rpm. Acoustic Filter Elements - DiracDelta Science & Engineering Encyclopedia
Now our street car are optimized for street performance hence air resonator is designed accordingly.If we use free flow replacement filter of same shape & size as of OEM filter without even removing resonator box then we are increasing flow of air within such system.So we get optimized benefit of increased flow throuout rpm range for which this air intake system is designed.
If we remove resonator box and add another intake system like K & N cold air intake then intake charecteristic changes which is now more tuned towards higher rpm.We get induction noise(which many people likes) and better tuned inflow at certain rpm range and not necesaarily at entire rpm range.
In the same manner exhaust system is designed to reduce very loud exhaust sound waves through network of expansion chamber & muffler(silencer).
Abhik,
I really appriciate your eagerness to understand technicality behind every mod and discussion in a healthy manner.
Last edited by finetuning : 21st July 2008 at 14:55.
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