Fresh air Headlight cover
05-23-02, 09:29 AM
#1
Fresh air Headlight cover
Has anyone used a fresh-air headlight cover? Does it work? Are there others out there besides the KSP one? ie cheaper ones. I've seen a lot of people making elaborate boxes and ducting - money aside, would one of these light covers be easier / better? Any experiences would help.
Nick
Nick
05-23-02, 10:38 AM
#2
Rotary Enthusiast
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the fresh air headlight cover pretty much just looks cool, i got the one from rx7.com, looks very cool, i guess you could hook up some sort of ram air to it, but it looks like most of the air would go down onto the headlight.
05-23-02, 10:45 AM
#3
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They do look aggressive, but they are poorly located in a low pressure area. If someone has that diagram of the second gens pressure areas you will see that the location of the scoop is not ideal. It probably does get some air in there, but for the money, you could find something better to buy.
05-23-02, 01:05 PM
#4
Haven't we ALL heard this
Oh dear....hear we go about this low pressure area thing again.
You have an airplane. The car is just like an airplane wing. You have air flowing over the top of the car and under the car. The air has farther to travel over the top of the car. The air under the car has go less distance. The air that parts at the front bumper must meet up with the air at the back of the car.
Just like a wing on an aircraft. This causes a low pressure area ontop of the wing (or car). This is how lift is produced and how airplanes fly. There is PLENTY of airflow going into the scoop and there should be PLENTY of air going into a duct on the head light.
This low pressure area has nothing to do with flow.
James
You have an airplane. The car is just like an airplane wing. You have air flowing over the top of the car and under the car. The air has farther to travel over the top of the car. The air under the car has go less distance. The air that parts at the front bumper must meet up with the air at the back of the car.
Just like a wing on an aircraft. This causes a low pressure area ontop of the wing (or car). This is how lift is produced and how airplanes fly. There is PLENTY of airflow going into the scoop and there should be PLENTY of air going into a duct on the head light.
This low pressure area has nothing to do with flow.
James
05-23-02, 03:55 PM
#5
I'm a boost creep...
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Originally posted by Wankel7
Just like a wing on an aircraft. This causes a low pressure area ontop of the wing (or car). This is how lift is produced and how airplanes fly. There is PLENTY of airflow going into the scoop and there should be PLENTY of air going into a duct on the head light.
This low pressure area has nothing to do with flow.
Just like a wing on an aircraft. This causes a low pressure area ontop of the wing (or car). This is how lift is produced and how airplanes fly. There is PLENTY of airflow going into the scoop and there should be PLENTY of air going into a duct on the head light.
This low pressure area has nothing to do with flow.
I still think those headlight scoops belong in the "looks" department, not performance.
05-23-02, 04:07 PM
#6
knowledge junkie
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05-23-02, 11:34 PM
#11
I'll have a Coke!
Originally posted by Samps
They do look aggressive, but they are poorly located in a low pressure area. If someone has that diagram of the second gens pressure areas you will see that the location of the scoop is not ideal. It probably does get some air in there, but for the money, you could find something better to buy.
They do look aggressive, but they are poorly located in a low pressure area. If someone has that diagram of the second gens pressure areas you will see that the location of the scoop is not ideal. It probably does get some air in there, but for the money, you could find something better to buy.
05-24-02, 09:35 AM
#12
I got my Fresh Air Headlight Cover from Rotary Performance.
With my cold air box, I thought It would Ideal to have both. RP claims not only It's aggressive but functional aswell.
I Installed It but It did not look right. The hard rubber flap from the bottom of the hood, which goes horizontally, which meets the body when you close the hood that prevents water from seeping In actually restricts passage of the Headlight cover. So that area around the flap was cut out to prevent restriction. Pretty neat observation that allows maximum utility of the HL cover.
Although, when I am washing my car I try to work around the HL cover. Eitherwise you will quickly end up with a water box Instead of a cold air box!
With my cold air box, I thought It would Ideal to have both. RP claims not only It's aggressive but functional aswell.
I Installed It but It did not look right. The hard rubber flap from the bottom of the hood, which goes horizontally, which meets the body when you close the hood that prevents water from seeping In actually restricts passage of the Headlight cover. So that area around the flap was cut out to prevent restriction. Pretty neat observation that allows maximum utility of the HL cover.
Although, when I am washing my car I try to work around the HL cover. Eitherwise you will quickly end up with a water box Instead of a cold air box!
05-24-02, 11:59 AM
#13
QC Motorsports
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The cooler intake temps sounds about right. So does the wing concept. I was going to use that one. Look at the headlight cover. You see how its not just a scoop over the fixture itself? There is a reason for this. You have air going over the car like an airplane wing. If you have a scoop that sticks up the you will get mega turbulance at the leading edge of the scoop preventing air into it. Now if you see that the scoop is as vaughnc put it "stamped" Then you will get what I'm about to say. In order to have max air flow through something you want a vacuum created by minor turbulence at the leading edge. This is done by "stamping" the headlight. By having it lower than the air going over it the presure is slighly lower. The lower presure rises creating a vacuum. This vacuum sucks air into the hole and will, if you duct it, creat a ram air system. Kudos to Wankle7 for the wing thing, and Kudos to vaughnc for the stamp.
The inlet is on a great spot of the car for higher speeds. thats what most performance parts like that are made for so most of the time unless you are going real fast you wont even feel that much of a difference.
Charles
The inlet is on a great spot of the car for higher speeds. thats what most performance parts like that are made for so most of the time unless you are going real fast you wont even feel that much of a difference.
Charles
