Ducting for Heat Exchangers
 

I'm working on ducting for the intercooler, oil cooler, ac condensor, and radiator and could use a quick once over/reality check. In otherwords: What are your thoughts on this ducting? I haven't put in the exhaust route for the intercooler (on the top) and the oil cooler (on the bottom). Looking for general critiques/improvements. My main concern is how I've divided the intake area to feed the different exchangers. Would it be better to divide the area vertical as opposed to horizontally?

https://lh3.googleusercontent.com/Pg...0-h640-no?.jpg
Looking towards the ass end from the front of the ducting.

https://lh3.googleusercontent.com/f_...0-h640-no?.jpg
Side on (duct on top is intercooler, middle radiator and AC condensor, bottom is Oil cooler)

https://lh3.googleusercontent.com/-I...0-h640-no?.jpg

https://lh3.googleusercontent.com/w0...0-h640-no?.jpg

Update: Don't do this arrangement. The dimensions of the opening reduce the hydraulic diameter to basically nill making it insufficient for cooling. The alternative is to keep about the same area but keep the entry cross-section a much more 'balanced' square/rectangle. This keeps the hydraulic diameter and the cross-sectional area in line with the rule of thumb of about a 1/4-1/3 the size of the heat exchanger.