Originally Posted by Jano_OddKidd
Ok i make it a little clearer.
The core on a GRS and other types, go accross the front towards each end cap. As soon as the air exits the core it is smoothly turned towards the pipework.
The core on a Pro Alloy type, go up and down. Which means that as soon as the air exits the core it hits a wall as such, then has to do a 90 degree turn with no aid of curvature from the design.
Im not trying to downgrade any item as im not an intercooler manufactor or know indepth information regarding designs etc.. Maybe someone who does know 100% all the differences and reasnons will help more. Im just adding my opinion as when tested different intercoolers on cars that i have done conversions on etc. I get to see how different items work and what gives the best results.
Hth.
I understand you now.
I would have thought that the restriction of the Proalloy end tanks would be negligable compared to the pressure drop caused by a twin pass cooler.