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Old 02-26-2008, 10:26 PM   #1
iRick.
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Default open pathway for air?

we've all seen it before. and for people like me, i get "what the...does that do?" going in my head

i'm talking about the cut out hole in the headlight...i'm assuming to run air to the intake

what benefits do you get from doing this?

aka why is it done?

thanks
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Old 02-27-2008, 12:22 AM   #2
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On a track car, it would be to get the freshest, coolest air available into the engine with the least restriction.

Simple.
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Old 02-27-2008, 01:23 AM   #3
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It's for the "ram air" effect. It will actually raise the atmospheric pressure of the air in the intake and engine. Kind of a supercharger in a way.
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Old 02-27-2008, 02:24 AM   #4
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so is it plausible for a street car?

i assume no correct?

i'm basically trying to find the cheapest routes for some gains
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Old 02-27-2008, 04:17 AM   #5
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Quote:
Originally Posted by jibtastic View Post
so is it plausible for a street car?

i assume no correct?

i'm basically trying to find the cheapest routes for some gains

Umm.. The term "street car" to me means that you want to have both headlights.
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Old 02-27-2008, 10:55 AM   #6
iRick.
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yes. thats why i said it prob isn't likely.

couldn't you just remove the right high beam though?
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Old 02-27-2008, 11:01 AM   #7
Subyroo2.5
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Quote:
Originally Posted by jibtastic View Post
yes. thats why i said it prob isn't likely.

couldn't you just remove the right high beam though?
And cut a hole in the headlight housing to let the air through?
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Old 02-27-2008, 11:28 AM   #8
EdHilario
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lmao wouldn't make sense.
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Old 02-27-2008, 11:42 AM   #9
Bluefoton
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Not worth it, you wouldnt have any noticeable ram air effect even at highway speeds...
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Old 02-27-2008, 03:24 PM   #10
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^word to that
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Old 02-27-2008, 03:31 PM   #11
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for sure. thanks for the help. just a pondering thought in my head..nothing more
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Old 02-27-2008, 03:57 PM   #12
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Yeah... the ram air effect is not worth the effort at daily driver speeds. Mostly the engine is sucking in the air so just make sure it has access to cool and fresh
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Old 02-27-2008, 04:03 PM   #13
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are there other cheap ways to get some more cool air to the stock intake?
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Old 02-27-2008, 05:05 PM   #14
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Turbinator!
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Old 02-27-2008, 05:13 PM   #15
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Pipe it to the fenderwell and call it a day.

If youre extra anal, heat wrap the intake pipes so heat from the engine bay won't somehow penetrate the intake piping
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Old 02-28-2008, 12:46 AM   #16
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Buy a NACA scoop from an aircraft parts catalog and cut a hole in your hood and mount the scoop. it will provide some positive pressure @ highway speeds. 80 mph on my CP301 (airplane) blows a lot of outside air into the cabin, enough to make loose paper fly around. kind of like having a window open in your car on the highway. now that would be a lot of work for not a lot of gain. oh yeah, put a airfilter in there somewhere.
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Old 02-28-2008, 10:17 AM   #17
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Quote:
RAM AIR. THEORETICAL POWER GAINS

Atmospheric pressure is about 14.7 psi at sea level.

At sea level, the pressure from ram air at 60 mph is about 0.08 psi. This is about 0.5% of atmospheric pressure. On a 200 horsepower engine, a 0.08 psi pressure increase will add about 1 horsepower.

At 85 mph, the pressure from ram air is about 0.16 psi. or about 1% of atmospheric pressure (at sea level). On a 200 horsepower engine, this will add about 2 horsepower.

At 100 mph, the pressure from ram air would be about 0.22 psi, or about 1.5% of atmospheric pressure. On a 200 horsepower engine, this will add about 3 hp.

COLD AIR. THEORETICAL POWER GAINS

Cold air intakes are very important for maximum performance and fuel economy. It is generally accepted that for every 10F temperature drop of intake air, an engine will gain 1% more power. Under hood temperatures can be over 100F higher than outside temperatures, so cold air can be good for a 10% power gain compared to air filters which get hot air from the engine compartment. On a 200 horsepower engine, a 100 F temperature reduction can be good for 20 horsepower.

Cold air provides significantly more power gains than ram air.
-----
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Old 02-29-2008, 03:25 AM   #18
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if you dont have factory foglights put a factory foglight housing with no light(ONLY ON RIGHT SIDE) that would work right? They sell them individually at genuinesubaruparts.com

that would give a unique look to the front end as well.
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Old 02-29-2008, 03:29 AM   #19
iRick.
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yeah i've seen it done. anyone have any comments on this?
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Old 02-29-2008, 03:51 AM   #20
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Do think you would get better gas mileage taking both fog light covers off and have them act as intakes. Or, are you better off with the aero-dynamicy?

Last edited by littlebhatia; 03-01-2008 at 02:38 AM.
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