I was wondering if anyone had come up with ideal sizes needed for a range of horsepower.

What would be the most optimal size with the least amount of pressure drop and cooling efficiency for say 400+, and then 500+, and 600+. Reason I ask is I see that some companys make theirs tall, others make them long.

Check out Precision's Website : http://www.precisionturbo.net they rate their intercoolers by hp.