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Originally Posted by Myxalplyx
Check this link out-->
http://www.autospeed.com/cms/article.html?&A=0629
It is an Autospeed article titled, "Eliminating Negative Boost". Perhaps a manometer like the one that is used in the article can be used to measure the effectiveness of replacing the stock air filter with an STi one. |
The article is written in a style befitting the anticipated readership, is typical of many magazines. The prospect of accurately measuring, a pulsating airflow moving at speed, through a tube at relatively low pressure, via small protruding orifice, mounted at right angles to the flow is mind boggling.
Briefly consider the principal of an atomizer, wave shape of the airflow, variations across the conducting cross section and the affect of RPM, all in relation to the figures published.
The exercise requires expertise obviously beyond the ability of the author.
