Ram Air Hood Question
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FTE Chapter Leader
Joined: May 2001
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From: Rhode Island
Ram Air Hood Question
I Have a question about ram air style hoods..... I was thinking on putting a ram air hood on my pickup... But I always wondered what would happen if I say parked my truck on an hill... or was driving in the rain... where would the water go? I have never owned anything with a ram air hood... so in lies my question!
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From: Magrath
Do you plan on putting Ram Air into your truck? If you are just looking for the look, Lund makes a stick on piece that looks sharp. I am pretty sure you can get them for under $100.
As for the whole hood, I think most the aftermarket hoods do not have the wholes cut and are just looks.
As for the whole hood, I think most the aftermarket hoods do not have the wholes cut and are just looks.
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Joined: Jan 2004
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From: Lubbock or Houston
Originally Posted by CowboyBilly9Mile
Be aware that ones with functional openings located at the front of the hood result in a diminish in horsepower at higher vehicle speeds. Physics is in action.
Can you explain this to me since I'm actaully looking into getting a funcinal ram air hood.
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From: Quispamsis, N.B, Canada
It would totally work man. I've thought it out. Same as the dodge ram. Physics? pfft not truck goes fast enough for that too happen. Maybe that bankspower diesel that went like 200 mph. That was sick.
More Turbo
Joined: Feb 2004
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From: Westfield, North Carolina
Well something like a Z28 Cowl shouldnt be a problem , since the opening is to the back, unless you spray water back into it, plus the factory "cowl" usually catches all the water when it rains anyways.
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From: Eastern WA
Originally Posted by subliminaldanger
Can you explain this to me since I'm actaully looking into getting a funcinal ram air hood.
In the early 70's, Pontiac was using a ram air setup with the scoops located at the front of the hood on TransAm's. What they discovered during testing was that there was a reduction in air pressure in the front (intake) scoop area on the front of the hood due to aerodynamics. This drop in pressure was reducing the available air for engine intake due to the lower pressure. It's the change of speed in the air as it moves from the grill area over the front of the hood that's the problem. Easy fix was to relocate the position of the air intake.
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Post Fiend
Joined: Nov 2001
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From: Topsfield, MA
I don't know if I agree with those statements....but I don't wish to get involved over it...
My ram air hood is functional, has ducts in the front, and I love it. It has drains built into it so any water would run out and not into the air intake, but if you stuck a garden hose in there it would make it to the intake.
I've had mine for 3 years.
I don't like the lund stick on things, fake...and stupid.
My ram air hood is functional, has ducts in the front, and I love it. It has drains built into it so any water would run out and not into the air intake, but if you stuck a garden hose in there it would make it to the intake.
I've had mine for 3 years.
I don't like the lund stick on things, fake...and stupid.
Post Fiend
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From: Eastern WA
Originally Posted by subliminaldanger
So basically you're saying the farther back the air intake, less of a problem this will be?
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FTE Chapter Leader
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From: Rhode Island
yeah I dont like the lund sitckems .... they scream " Im too cheap to buy a real hood!"
Im not really the type to hop on the highway and blast up to 150mph, Im really just intrested in the hood for looks and a little gain in hp... if its low end... im fine with that...
Im not really the type to hop on the highway and blast up to 150mph, Im really just intrested in the hood for looks and a little gain in hp... if its low end... im fine with that...
Posting Guru
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From: Destin/Ft. Walton Beach,
The Ram Air IV Firebird had scoops facing the front, and made more horsepower then the non ram air version. Pro Stock Drag cars have HUGE scoops facing forward, and they go over 300 miles per hour. Sorry Cowboy, but you need to brush up on your Physics. More air in ='s more air out ='s more horsepower. There's also Ram Air Mustangs with a functional ram intake, and lot's of ram air Road Runners with a pop up ram air scoop facing forward that help them make power. Then we can discuss all the ram style cold air intakes that are on thousands of vehicles, that also help them make more power. It's all in the shape of the hood scoop that dictates the aerodynamics and functionality of the scoop, and what principles govern the physics involved. 
Senior User
Joined: May 2002
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From: Bayonne NJ
Originally Posted by CowboyBilly9Mile
Well, when the speed of air increases the pressure drops. The opposite is also true. This is what causes the wings on an airplane to have lift. It's called Bernoulli's principle.
In the early 70's, Pontiac was using a ram air setup with the scoops located at the front of the hood on TransAm's. What they discovered during testing was that there was a reduction in air pressure in the front (intake) scoop area on the front of the hood due to aerodynamics. This drop in pressure was reducing the available air for engine intake due to the lower pressure. It's the change of speed in the air as it moves from the grill area over the front of the hood that's the problem. Easy fix was to relocate the position of the air intake.
In the early 70's, Pontiac was using a ram air setup with the scoops located at the front of the hood on TransAm's. What they discovered during testing was that there was a reduction in air pressure in the front (intake) scoop area on the front of the hood due to aerodynamics. This drop in pressure was reducing the available air for engine intake due to the lower pressure. It's the change of speed in the air as it moves from the grill area over the front of the hood that's the problem. Easy fix was to relocate the position of the air intake.
Post Fiend
Joined: Feb 2003
Posts: 6,940
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From: Eastern WA
20+ years as a Mechanical Engineer with two degrees; I won't further waste my time. Do what ya think is right and be happy. I aced Physics at the university I attended and don't forget, but oh well. Smile and be happy.
Last edited by CowboyBilly9Mile; Feb 11, 2005 at 11:09 PM.