a/a intercooler sizeing

[vortecfiero]

I've read maximum Boosts chapter on sizing but he leaves out one step and it isn't quit clear on actual length and width sizeing

I found this which is a lot easier but I'd like to see how you arrive at the final core sizing

http://www.turboneticsinc.com/air.html

(I make spreadsheets for this stuff to try different stuff)

does anyone have any links or comments (constructive) to share ?