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View Poll Results: What Are You Running?
K&N 14 42.42%
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  #46  
Old 05-03-2011, 07:55 PM
FireRanger FireRanger is offline
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Default Re: Cold Air Intakes...I wanna know...

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Originally Posted by Teg360 View Post
a cylinder is a place of zero pressure and the pressure that is outside of the cylinder is 14.69. so when on the intake stoke which makes air come into the cylinders cuz the air is bein sucked due to the pressure difference while the fuel is being sprayed in. so if you make the air flow bigger and force more air into the cylinders hints the name short RAM intake your air fuel ratio will be different.

And the "heat shield" is the plate right behind the air filter
Your understanding of how the air enters the engine and how the A/F mixture works is incorrect. Putting a bigger shiny tube on the intake will not make it just magically such more air in. The intake is not restrictive. Ford engineers are not stupid. It is already sized to accommodate the maximum amount of air that the engine needs. You could put a 3ft storm water pipe on there and it won't change a thing. A forced induction system is the only way you're going to force more air in that it wants and lots of other changes are needed to make use of that air.

The fuel mixture is regulated by the computer by monitoring the air flow, air temperature, and throttle position along with various exhaust and temperature sensors. Simply trying to ram air down its throat that it can't or won't use is not going to improve anything.

And that plate is shielding one of 6 sides of a box in a hot engine. I don't see how that is going to prevent it from sucking in hot, performance robbing air.
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How to: Aux light wiring, relays, & fuses
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Last edited by FireRanger; 05-03-2011 at 08:00 PM.
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  #47  
Old 05-03-2011, 07:59 PM
matt224 matt224 is offline
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Default Re: Cold Air Intakes...I wanna know...

CAI and ram air are pretty much interchangable as ram air does not exist. In fact, a ram air setup can usually provide colder air temps than a traditional CAI. my trans ams setup brings moving air directly to the intake, moving air has lower temps. The way the term ram air is used is wrong imo, ram air is generally taken to mean it will pressurize the incoming air/forcing more into the engine) which it does not do.
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  #48  
Old 05-03-2011, 08:00 PM
Teg360 Teg360 is offline
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Default Re: Cold Air Intakes...I wanna know...

i never said that it worked it is the theory behind it i know that the computer controls the air fuel with the sensors on the intake exhaust and other sensors. and the only way to really get it to work like they say it does is to get a tuner to adjust the things that control it then it will make a little bit of a difference
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  #49  
Old 05-03-2011, 08:09 PM
FireRanger FireRanger is offline
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Default Re: Cold Air Intakes...I wanna know...

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Originally Posted by matt224 View Post
CAI and ram air are pretty much interchangable as ram air does not exist. In fact, a ram air setup can usually provide colder air temps than a traditional CAI. my trans ams setup brings moving air directly to the intake, moving air has lower temps. The way the term ram air is used is wrong imo, ram air is generally taken to mean it will pressurize the incoming air/forcing more into the engine) which it does not do.
Moving air is not colder than still air. Wind chill factor only effects humans and other similarly designed animals. That's not a change in air temperature, thats just how it feels to use. Fresh air into the intake is fresh air into the intake regardless of how or where it enters and where it goes. You can not make it colder that ambient without some kind of obscene refrigeration system.

Dropping PRESSURE through a venturi (as inside the throat of a carb) will reduce the temperature through adiabatic cooling. This is not something the occurs in your intake.
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2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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  #50  
Old 05-03-2011, 09:33 PM
Blacked Out FX4 Blacked Out FX4 is offline
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Default Re: Cold Air Intakes...I wanna know...

I'm almost sorry that I posted this...turned out to be a bigger deal than expected.
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  #51  
Old 05-03-2011, 09:37 PM
FireRanger FireRanger is offline
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Default Re: Cold Air Intakes...I wanna know...

Don't be sorry you posted it. People post this question several times a month. They are very convincing flashy advertising campaigns to sell those things. If you don't really know how your engine operates now, you can't make an informed decision when buying parts for it. Relying on advertising won't help you so asking here is why this forum is here. Now you know its not so cut and dry as "buy intake, get power". You can decide whether you want to spend your money on it (imo, a waste) or save it for something else.

I suggest an xcal or similar tuner. Nearly the same amount of $$ and they make actual improvements.
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2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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  #52  
Old 05-03-2011, 09:50 PM
matt224 matt224 is offline
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Default Re: Cold Air Intakes...I wanna know...

Quote:
Originally Posted by FireRanger View Post
Moving air is not colder than still air. Wind chill factor only effects humans and other similarly designed animals. That's not a change in air temperature, thats just how it feels to use. Fresh air into the intake is fresh air into the intake regardless of how or where it enters and where it goes. You can not make it colder that ambient without some kind of obscene refrigeration system.

Dropping PRESSURE through a venturi (as inside the throat of a carb) will reduce the temperature through adiabatic cooling. This is not something the occurs in your intake.
You are right. I went back to an old thread on ls1tech, where I had originally came up with the idea of the moving air being colder. What I should said was that the outside air is much cooler than under the hood, and a ram air setup is the most ideal way to bring fresh, cold air in.
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