04-06-2008, 09:17 PM
Join Date: Aug 2007
Location: Southern Indiana
Total Cats: -1
Opinions on 21.5x5.5x2.5 core IC
So, im looking at this
intercooler on ebay. Its only 2.5" thick but following these calculations that braineack that posted up, it should support around 300hp. That more than i would ever run and even if i did, i would have WI. My main concerns are to keep air temps low and be able to keep my A/C drier. I just want to make sure i have all my "ducks in a row" before i make a purchase.
Originally Posted by Braineack
Corky did a lot of testing. and he's determined that a core of 18-20 has done it's job fully. where a 21", 22", even 30" long intercooler will not cool the charge any more significant amount.
then keep in mind increasing core thickness does not proportionally increase heat transfer capability. Each increment of core thickness will receive hotter cooling air. 3" in itself is plenty thick. Then you get into drag, and and it makes it harder for air to pass, and especially harder for the radiator to do it's job.
It's all compromise, but Corky will say that you want 6-7 square inches of internal flow for every 100HP.
internal flow area =
length of runner x height of runner x # of runners
11 x .125 x 16 = 22 inē
22/.06 = 366BHP
18 x .125 x 16 = 36 inē
36/.06 = 600BHP
Any suggestions/comments are greatly appreciated.