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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Found this here:ARE Cooling (Aluminium Radiators & Engineering P/L)

Most importantly is that the square edged tanks hurt air flow & increase "static" pressure drop. The intake charge does not want to make a sharp turn with the majority of the air taking a radiused path around the edge, causing some of the air to eddy back around through an elongated 360 degree tumble. This causes friction with both the wall surface & the following air, really hurting flow figures.


...Asking charge air to open out at 360 degrees, as in a 50mm pipe into the middle of a 90mm flat rectangular tank, causes a big pressure drop...

Lots of good info for those interested.

Last edited by 911st; 02-11-2010 at 02:20 PM..
Old 02-11-2010, 02:04 PM
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