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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Spearco Intercoolers has some pretty neat design info: http://www.turboneticsinc.com/sites/default/files/AllAboutIntercooling.pdf

Included is some notes like-- pressure loss in intercooler manfolds (end tanks) can vary wildly and can be in the .1 to .3 psi per side; a mandrel bent longer 90 might create a pressure drop of .1 to .3 psi and that a cast tight elbow might cost .3 to .4 psi.

The more pressure loss from the core, turns, end tank design etc the more the turbo has to work to overcome. The higher the boost the turbo much see, the more pressure in the exhaust system...

Just using this info on a 964 factory intercooler it might only see .1 per each end tank or about .2 or so pressure loss.

An end to end might have say .1 for the S up in to the end tank, .2 for each fabricated end tank. .2 for the 90 out of the tank, and .2 for the 90 to the throttle body for about .7 psi or so pressure loss. That is maybe .2 v .7 psi loss.

To this we add the pressure drop of the core itself.

Just a data point, not a major conclusion.

Last edited by 911st; 02-11-2010 at 09:05 AM..
Old 02-11-2010, 09:03 AM
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