Quote:
Originally Posted by Dimman
Thanks. Reason for the question is how FT86Speedfactory says air is deposited in the middle and equal amounts hit both horns. I realize he's not the tech guy, but it sounds like the testing is backwards.
It sounds like you are virtually blowing air through the manifold and making sure each runner gets the same amount. What you should be doing is blocking off 3 runners where they would meet the head and then suck air through the one you are testing and measure the flow. Then repeat for the other three and compare. This is how physical static flow testing is done, CFD should probably be done the same way.
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We did this as well. We found a few neat things from doing it that way as well as flowing into both runners simultaneously. But both tests are inaccurate as is any static test. Flow within the engine is never static, but very dynamic in nature.