Hi all, I need some suggestions, guesses even. I'm thinking about making a custom air filter for my car that I want to flow well, of course, but also have better filtering efficiency than some other filters on the market. I'd like to find a way to compare the airflow through each design, and also compare the amount of fine dirt trapped. Unfortunately I have no flow measuring equipment, no microscope to take good looks at the filters, and no artificial dust of known micron sizes. I refuse to throw handfuls of dust at my filters to simulate a year's worth of driving just to compare the trapped material. The best idea I've come up with so far is to somehow make an airtight connection betwen each filter design and my vacuum cleaner. Unfortunately I have no way to compare airflow or filter efficiency and I'd probably have to use fine, dusty dirt as my test dust. I can make crude comparisons of filter colors to judge dirt trapped, and look at what dust made it through the filter and into the vacuum cleaner's regular dust bag. Any suggestions??? Thanks.
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