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Old 12-30-2009, 04:47 PM   #5 (permalink)
aerohead
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Mopar parallel heat-exchangers

Quote:
Originally Posted by MetroMPG View Post
As far as individual modifications go, adding a properly designed aerodynamic cap will yield the biggest drag reduction: 20%

You might want to peruse the data in the index of links on this page: http://ecomodder.com/forum/showthrea...ists-7118.html



Diverting excess air flow that isn't needed for cooling improves drag because the path through the dirty engine bay and eventually underneath the truck is worse than sending it around the outside of the vehicle. The flat front doesn't matter so much, provided the transition to the sides and top have enough of a curve (which your truck does).

If you're going to block the grille, do it progressively, and monitor temperature like a hawk. Also, you have to pay attention to the intercooler if you have one. Some of the other diesel drivers may pipe up.

Big Dave swears by his. There is data in the link provided to support their effectiveness. As for looks, well that's your call!

[quote>Will probly block off fog light holes and spaces in front bumper.
Coudn't hurt.

If you can do it without compromising safety, go for it. Rare are the mods that reduce both Cd and A.[/QUOTE]

Be extra carefull blocking your Dodge.I believe the heat-exchangers are parallel ( side-by-side ) instead of serial as in most vehicles.
Dr. Korff would say that your inlet,while only 1/6 the height of your exchangers,would still have to be full-width,and the duct would have to be as "deep" as the full height of the cores.And completely air-tight.
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