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      07-29-2012, 09:50 PM   #35
NYCX3
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Drives: 2013 BMW X3 28i
Join Date: Jul 2012
Location: Staten Island, NY

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Quote:
Originally Posted by kmarei View Post
Most people "sense" an improvement with after market air filters
But most dynos don't show any HP gain
On the contrary, some of those filters actually lose power
So what we perceive, and what is fact, don't always match up

If you are saying there are noticeable differences
How come no scientific test has ever measured this ?
I've searched a lot for any measurements done on new speakers, and those same speakers after this so called break in
Never found any that showed a difference that was outside the margin of error for the tests
0.2db is small enough that it could be measuring error
And I doubt any ear here can detect 0.2db
The average wear can't detect changes less than 3db

Certainly, Placebo effect has been documented very well also, whereas, the mind can be fooled to manifest an effect or perception that is real to the person. I do not doubt there is some element of placebo effect involved with these type of things, but neither do I deny physical changes to the moving parts, it's the nature of all atoms and matter... to wear out or break away, now whether the sound is changed at obvious level of perception, is up to scientific proof and individual perception. So until then, we are just throwing opinions around.
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