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-   -   Ram-air Design Idea (http://www.camaro5.com/forums/showthread.php?t=8348)

Kyle2k 10-16-2008 01:02 AM

Ram-air Design Idea
 
I hear a lot of people commenting on how the mail-slot is not functional. So..here is a rough idea of how (even you) could make it functional with some automotive supplies. Or for any engineers out there.

http://img374.imageshack.us/my.php?i...3ramairfy9.jpg

Milk 1027 10-16-2008 01:03 AM

nevermind I see it. Not a bad idea but i don't care for functional scoop.

Kyle2k 10-16-2008 01:04 AM

It would be some extra pluming, but it could bring some cool air to the intake.

TAG UR IT 10-16-2008 01:09 AM

I honestly don't think that little mail slot will do enough for the flow of air anyway. I think the main air intake would have to be behind the lower grill or upper grill... That slot...nope...too small.

Can't wait to see what SEMA has in store for us in that dept. You know that SOMEONE must have something ready to go!

Kyle2k 10-16-2008 01:13 AM

Quote:

Originally Posted by TAG UR IT (Post 160689)
I honestly don't think that little mail slot will do enough for the flow of air anyway. I think the main air intake would have to be behind the lower grill or upper grill... That slot...nope...too small.

Can't wait to see what SEMA has in store for us in that dept. You know that SOMEONE must have something ready to go!

Where it loses in height or girth or whatever you want to call it it makes up in length.

Lets assume the mail-slot is 1 inch tall and 12 inches long. So

A= L x W
12in^2 = 1in. x 12in

Whereas if it was a more traditional circular ram air, etc. with a 4in. diameter.

A= pi x r^2
12.56in^2 = 3.14 x 2^2

It only has half an inch less area to bring air in.

btw, it would be to just supplement the air filter, it could just funnel into the air box. (yet still bringing in cool air)

headpunter 10-16-2008 01:26 AM

if the car was forced induction i could see it working because it would actively be sucking air in, but naturally aspirated no way that hole will allow enough flow.

ShnOmac 10-16-2008 01:29 AM

QUOTE=headpunter;160713]if the car was forced induction i could see it working because it would actively be sucking air in, but naturally aspirated no way that hole will allow enough flow.[/QUOTE]

:word:

Kyle2k 10-16-2008 02:09 AM

Quote:

Originally Posted by headpunter (Post 160713)
if the car was forced induction i could see it working because it would actively be sucking air in, but naturally aspirated no way that hole will allow enough flow.

I don't see how it couldn't have enough flow. The internal combustion engine is a glorified air pump. Think about it, we have a 6.2 liter engine (mind you, receiving all the air through a 90mm throttle body) , so every 2 rotations of the crank of the engine, 6.2 liters of air is getting pulled in and compressed, ignited, and released. So even at a somewhat low rpm of 4000 (where you might expect to see gains from a ram air anyways) the engine will be rotating ~67 times a second. divide that by 2, because every second rotation it will bring in 6.2 liters. You will be sucking in ~208 liters of air EVERY SECOND.

I would appreciate an engineer or someone to chime in and correct any wrongs. But, it's getting late I think I will leave the rest for tomorrow lol

headpunter 10-16-2008 02:19 AM

when you impede the flow you are getting less density in the air charge.

Kyle2k 10-16-2008 02:20 AM

What flow are you impeding, this would supplement the air filter.

headpunter 10-16-2008 02:33 AM

Quote:

Originally Posted by Kyle2k (Post 160754)
What flow are you impeding, this would supplement the air filter.

if you are doing it suplimentally it should i guess, i still want to reverse mount the hood and use hood pins to hold it down to allow for alot more room to cut out in that area.

Kyle2k 10-16-2008 02:42 AM

Quote:

Originally Posted by headpunter (Post 160756)
if you are doing it suplimentally it should i guess, i still want to reverse mount the hood and use hood pins to hold it down to allow for alot more room to cut out in that area.

I agree that more room would also probably allow more room for a better design, but, the bottleneck all along the induction line by far is still the throttle body. It has a ~3.5in diameter. If my estimates for the mail-slot are correct. that is still ~2in less surface area for flow through the throttle body than it is through the mail slot.

swifttal 10-16-2008 03:52 AM

Quote:

Originally Posted by Kyle2k (Post 160697)
Where it loses in height or girth or whatever you want to call it it makes up in length.

She won't agree with you on that one pal... :(

Crowley 10-16-2008 07:27 AM

I would rather see something where you could get that slot to provide additional airflow over the radiator ..

Crowley

Muscle Master 10-16-2008 08:24 AM

the slot is to close to the radiator anyway, you only be sucking in hot air

radz28 10-16-2008 09:32 AM

I don't think the slot would provide significant airflow personally. I'd look for a set-up similar to what the 'Vette-guys have from VaraRam. They get like 3-tenths in the 1320' with that ram air set-up and think there may be a chance of something similar for us. Time will tell :D

Mr Twisty 10-16-2008 10:04 AM

Rotate the throttle body main inlet 90 degrees (straight up.) Add 4th gen type filter with a soft-seal on the outer edge, add plumbing from front underside of hood to the cowl, (where it would meet filter with hood down,) VOILA! Cowl induction. [edit] Or if you'd prefer ram-air, modify the hood so the mail slot is on the hood directly in front of the new filter position mentioned.

lalometalik 10-16-2008 10:30 AM

it is strictly a visual design feature. the slot is positioned directly in front of the hood latch. this is not possible as already discussed on a different thread.
click below:
http://www.camaro5.com/forums/showthread.php?t=5365

Dan 10-17-2008 09:38 AM

1. There is a structural support right behind the slot so your idea would not fit.
2. There is no such thing as ram air.

Chewy 10-17-2008 09:58 AM

Quote:

Originally Posted by Dan (Post 162824)
1. There is a structural support right behind the slot so your idea would not fit.
2. There is no such thing as ram air.

Quote:

Ram-air intake
Quote:


From Wikipedia, the free encyclopedia

Jump to: navigation, search
Contents

[hide]
A ram-air intake is any intake design which uses the dynamic air pressure created by vehicle motion to increase the static air pressure inside of the intake manifold on an engine, thus allowing a greater massflow through the engine and hence increasing engine power.
The ram air intake works by reducing the intake air velocity by increasing the cross sectional area of the intake ducting. When gas velocity goes down the dynamic pressure is reduced while the static pressure is increased. The increased static pressure in the plenum chamber has a positive effect on engine power, both because of the pressure itself and the increased air density this higher pressure gives.
Ram-air systems are used on high performance vehicles, most often on motorcycles and race cars. Ram-air has been a feature on some cars since the late sixties, but fell out of favor in the seventies, and has only recently made a comeback. Modern parachutes use a ram-air system to pressurise a series of cells to provide the aerofoil shape.
At low speeds (subsonic speeds) increases in static pressure are however limited to a few percent. Given that the air velocity is reduced to zero without losses the pressure increase can be calculated according to:
dP / P = (v2) / (2RT)
:thumbsup:

Mr Twisty 10-17-2008 10:29 AM

Quote:

Originally Posted by Dan (Post 162824)
1. There is a structural support right behind the slot so your idea would not fit.
2. There is no such thing as ram air.

A carburetor venturi is ram-air, the SR71 Blackbird uses ram-air. I believe the F22 is also using ram-air to go supersonic without afterburner.

Crowley 10-17-2008 10:56 AM

Quote:

Originally Posted by Dan (Post 162824)
2. There is no such thing as ram air.


Hmmm .. I'm pretty sure that the fart out of a RAM can be called Ram Air !!

:sm0:

Crowley

DGthe3 10-17-2008 12:30 PM

I think that the main slot needs to be a bit taller before it could ever really be functional as a scoop. An extra 1/2 in might be all thats needed. Then there is the whole issue of not having any room behind it to put any plumbing.

But if you open it up it might do a bit to help keep the engine cool.

Dan 10-17-2008 12:53 PM

An F22 and a Blackbird can go fast enough to see a pressure change and a ram effect, a car cannot. Reading that it can on wikipedia is about as much use as asking someone on the street since it is written by whoever thinks they know what they are talking about.

Kyle2k 10-17-2008 03:25 PM

Quote:

Originally Posted by Dan (Post 163115)
An F22 and a Blackbird can go fast enough to see a pressure change and a ram effect, a car cannot. Reading that it can on wikipedia is about as much use as asking someone on the street since it is written by whoever thinks they know what they are talking about.

Or asking you what you think.... :bellyroll::respekt:

My original idea is intended to bring cool air to the airbox more than charge it and cause a pressure increase :)


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