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Originally Posted by WAR-20B
Not a very wise idea.
Ever heard of Helmholt resonance...?
AVOIDING this resonance is the reason why manufacturers use the resonator box.
When you remove it, you hear more induction noise. This is due to a coarser air flow into the AFM. The resonator smooths this air flow allowing more air down the pipe for its given diameter.
They are very common on NA cars especially in F1 where air speed along a pipe is critical.
Here is a web site to explain the technicalities of "that little box" > Here <
If you shorten the intake tract with (say) a pod filter, then you shift the resonant frequency up beyond the rev range so its not an issue.
However, if you keep the longer intake tract (standard pipe work) then the resonant frequency of that intake tract is lower & (usually) within the RPM range of the engine. Thus the need of the Helmholtz resonator to overcome it.
REgards |
Proven additional mile an hour at the track - which is a good indication of an increase in power.
Crack it open and hav a look at it, its NOT going to smooth out the airflow in a pink fit. no way known. It is a massive restriction. Don't believe me? shove it on a flow bench.
Yes it makes your intake more noisey. By removing it you are making the intake tract shorter. considerably shorter.
Smooth air flow is also *impossible* to achieve on our standard pipe work. Beyond the airbox, it goes through a corigated pipe.
Stripping resonators out of cars for cheap/free power has been done for ages, and is a proven way to gain a bit of extra throttle response and maybe a small hit of power.
I have removed the resonator, and am making more power. Be that because the pipe work is shorter, more direct and less turbulent, or because the pipework is shorter and thus the air doesn't have as much time to heat up, or a combination of both, its definantly given a noticable gain.