Comparing Flowbench Results

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Comparing Flowbench Results

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Product Information

Trying to compare flowbench numbers from various sources is a lot like comparing OEM horsepower ratings.  The method of testing has changed over the decades, and the individual tests use different calibrations and corrections.  Being able to test with the same operator and equipment for thousands of tests has been the ideal method to keep variables low for research, but we needed to verify our results with proven flow plates known as Pass Around Plates to know if our calibration was equal to what the well known companies are seeing.  Because of this, we absolutely have to share the results for anyone who wants to use our numbers for their own research. 

Our posted intake numbers from 2006-March 2017 are within tolerance for the equipment, and are within the range seen by the other individuals and companies.  Our exhaust numbers were inflated 7.5-10% across the board.

After finding out these results and examining the test procedure, the reason is obvious.  Each plate has a specific hole size, as well as a 45 degree back cut to a sharp edge, which creates a known turbulance.  The plate is flipped to face the flow, which our calibration tube was not designed for.  Flipping the tube around does not do any good, as it was not designed with this in mind.  Therefore, we are now using the 100CFM plate to calibration for exhaust.  The results are pictured, and are excellent. 

We will continue to use the original calibration tube for intakes, so all our numbers for intake will remain consistent.  All exhaust numbers from April 2017 on will be accurate. 



Product Code ArticleFlowResults
Manufacturer WOT-Tech
Condition New

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