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Old 06-26-2010, 11:36 PM   #1
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Air Scoops !

OK, I am a little confused with this

Intruction say to install the scoop with the opening facing the windshield.

"For maximum air flow, the scoop should be mounted facing the windshield"

I am no aerodynamics major but how is it possible get more air facing the windshield as opposed to mounting it facing forward

It also looks kool facing forward to boot....

The one I have is mopar...similar to this

15002 - Cowl Vent Air Scoop in Textured Black, 1998-09 Jeep Wranglers | ShopJeepParts.Com


Anyone care to chime in?


Alfy

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Old 06-26-2010, 11:47 PM   #2
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Because of the disturbance in the airflow around the Jeep while moving forward it will catch more air when facing the windshield. Same reason a ton of air comes in the sliding back glass of a pickup truck. You do not want to face it forward because it will apparently catch a lot of water and debris. At least that's what I've read here. I personally don't have a scoop at all.

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Old 06-26-2010, 11:48 PM   #3
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Originally Posted by Ageless Stranger View Post
it will apparently catch a lot of water and debris......
That does make sense


Alfy
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Old 06-26-2010, 11:53 PM   #4
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Here is another recent thread. Linky.

And another
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Old 06-27-2010, 12:03 AM   #5
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Thanks for those links, those answer alot

I actually did a search for hood scoops and came up with nothing..I did not want to repeat a thread that was already asked

Thank You
Alfy
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Old 06-27-2010, 12:18 AM   #6
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Quote:
Originally Posted by Ride_My_Jeep View Post
Thanks for those links, those answer alot

I actually did a search for hood scoops and came up with nothing..I did not want to repeat a thread that was already asked

Thank You
Alfy
No worries.
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Old 06-28-2010, 01:37 AM   #7
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didn't look at the links, but back in th early seventies, camaro and firebird had scoops facing windshield.
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Old 06-28-2010, 09:17 AM   #8
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Heh Heh, yea the Camero --Z28, Dodge "Shaker hood", Plymouth "Bee's" all had various hoods, designed for racing, some reverse based on windshield "dead zone" at the base of the windshield!!

All the scoop's had to be over 1.5" above the hood surface, because of the air flow, "Boundry Layer"--

These were aerodynamic FAST cars-with various degrees of windshield flow angle, yet NONE of the scoops worked below 80 mph

Now take the Jeep (brick), put a reverse scoop on it, with a (brick) windshield !!

Better to just face it forward, you might feel a LITTLE difference in vent flow at your feet, maybe not

Good luck

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Old 06-28-2010, 10:21 AM   #9
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Better to just face it forward, you might feel a LITTLE difference in vent flow at your feet, maybe not

Good luck

JIMBO
I already mounted it.. One thing that stuck out in my head was the excess water that would enter the scoop..I went with the norm and mounted it facing the windshield

Thanks for the help folks
Alfy
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Old 06-28-2010, 10:40 AM   #10
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What is wrong with this thread? I don't see any pictures. We love pictures. Lets see that install!
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Old 06-28-2010, 09:09 PM   #11
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chevy called it cawl induction, they even had trap door built in that opened up at wot.
there is a high pressure spot at the base of the windshield that would be even higher on a Jeep because the flat almost verticle windshield will force a large amount of air toward the bottom.
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Old 06-28-2010, 09:11 PM   #12
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What is wrong with this thread? I don't see any pictures. We love pictures. Lets see that install!
I kinda figured the install has been beaten like a dead horse around here .. But, I dont mind showing off pics of my jeep installs..

I'll do ya one better... I post pics of the air scoop, gast tank filler, rear panel guards and the air deflector.. everything I got with my mopar bucks in the next few days


Alfy
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Old 06-28-2010, 09:15 PM   #13
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I had one, I turned it away from the windshield. It did increase airflow and helped the A/C but I took it off because I didnt care for it anymore. But snow and debris did get in there during the winter months.
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Old 06-28-2010, 11:43 PM   #14
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I'm not too sure if facing outwards is going to increase air flow. Keep in mind you need laminar flow in order to make sure that the boundry layer is as close to the hood as possible, otherwise you won't have air mixing. Even though the boundry layer is only parts of inches thick, the lower to the hood, the better it is. The velocity profile increases as you go from laminar to turbulent.

Actually it's a rather interesting aerodynamics problem. I'm gonna try to model it and let you know what results I guess. Lets put my degree to good use

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