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Old 05-30-2003, 10:55 PM   #1
Zerolapse
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Question Gains From Ram Air??

Hey everybody, I did a search and didn't see much about ram air, so I'm wondering what kind of performance gains do you think I would get if I built some sort of system? I'm thinking about building scoops, probably 2 perhaps where my currently unused fog light cutouts are (I've got a brighton) they're low which would help prevent water from getting into the engine, not to mention look cool. These would then be connected to some sort of pipeing, go through some sort of filter up top then into the throttle body. What do you guys think?

Zero
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Old 05-31-2003, 11:22 AM   #2
nate49509
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witty comment goes here

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I read some were that ram air is a myth. It stated that in order get any benifits from a ram air type setup you have to be going like 150 mph to build up the pressure.
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Old 05-31-2003, 06:59 PM   #3
Kevin Thomas
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Default Myths

Quote:
Originally posted by nate49509
I read some were that ram air is a myth. It stated that in order get any benifits from a ram air type setup you have to be going like 150 mph to build up the pressure.
Some people say this but it depends on the car I guess. I made a ram-air type setup on my XT6 and my EGTs would soar post 60mph. My air/fuel ratio was also getting to be very lean the faster I went. I actually had to raise the fuel pressure with an adjustable fuel pressure regulator to add fuel. This is with the stock air box, stock filter.

Results: I usually ran 78-79mph in the XT6. This past Tuesday I ran 14 runs and all where in the 81mph range. I used to run 78-79mph despite running the car previously in cooler weather (any weather for that matter). Now I'm changing the intake again to a JC Sports setup utilizing the ram-air type setup to see if I can break into the 82-83mph range. Your results may very. Good luck!
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Old 06-04-2003, 01:06 AM   #4
spshultz
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I ran one on my '99 for a while and it did make a difference but only over 75 MPH. Anything under this and it felt normal.

Since I drive 100 miles round trip to work and all of it is a 75 MPH speed limit, going 80 MPH isn't out of the question and an occassional 90 MPH is fun. At these speeds I could feel a difference in the way it wanted to run. Kind of like it wasn't so weazy when you put your foot to the floor. I wish I had some way to measure the pressure inside the filter box to see if it was actually making a difference.

I took mine out because it was rattling and very close to the airbag yellow wire. I didn't want it going off because the pipe rubbed through it.
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Old 06-05-2003, 04:08 AM   #5
ChicksDigWagons
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Ram air isn't exactly a myth, it can work. But things to keep in mind is high and low pressure zones on the car. The front of the bumper usually is one of the two higher pressure areas on the car. The disadvantage being that debris has an easier time getting in.

Cowl induction is probably the best at keeping real pressure on the system while keeping water and bugs out. A rearward facing scoop with the entrance very close to the bottom seam of the windsheild. Water and bugs can't make the 180' turn like the air can.

Otherwise you have to get a scoop up and out of the bounary layer of air that cusions your car as it cuts through the air. This can be several inches off the surface of the car in some instances. It also ends up adding more wind resistance.

-Brad
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Old 06-05-2003, 10:54 AM   #6
NotAnRS
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Lightbulb

It ain't ram air, but it works about as well and it's free.
http://www.mongrelmotorsports.homestead.com/subaru.html
Scroll down the page a bit and you'll see it.
Makes cool noises, straightens out the airflow significantly, probably does little or nothing for power.
But, again, it's FREE!
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Old 06-05-2003, 05:27 PM   #7
Kevin Thomas
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Default Yep!

Quote:
Originally posted by NotAnRS
It ain't ram air, but it works about as well and it's free.
http://www.mongrelmotorsports.homestead.com/subaru.html
Scroll down the page a bit and you'll see it.
Makes cool noises, straightens out the airflow significantly, probably does little or nothing for power.
But, again, it's FREE!
Is this what you are referring too?



If it is, this is exactly what I did on my XT6. I cut out off the air chamber and ended up using Home Depot aluminum ducting clamped on to it. From here, it's routed out to the passenger side foglight. If you get low enough to the ground, you can actually see the alimimun ducting facing you allowing for the air to go straight in. Really ghetto! It wouldn't look right on the cool looking 2.5RS. It did give me a 2mph gain in the 1/4 though. I ain't going to any car shows anyway.
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Old 06-06-2003, 02:03 AM   #8
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Cool

Actually I was thinking a little bit more on the custom side of things (considering my intake isn't stock to begin with) :-) Do you guys think it would be worth the trouble?

Zero
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