Ram Air Intake Design, I got bored

[TXMazdaSpeeder]

would this work? after drawing it up i realized the air box needs to be moved farther up the pipe or it would suck in straight water in the rain. the reason i said 91 Z28 K&N filter is because it is a 5.5" sqaure filter that could be placed in a small airbox in the pipe very easily.

 

[AZDriftR]

yes this would work.. some of the SCCA touring car proteges have something very close. but i would think a shorter pipe would be more effecient. like say the same design strait up to the front head light.. you could cut our the left side driver blinker from the rear of the light and fix a pipe in there through to the ffron of the light cover and use something to seal it. ive seen this on Audi's and you cant even tell there is a pipe there intell you really look. plus its a straight shot from there to the TB, and it would keep you fogs

 

[TXMazdaSpeeder]

thats another thing i was thinking about, i've seen a projector mod where u place a projector in the headlight housing , u could then place a pipe next to that, im pretty sure they make them for supras like that.

 

[AZDriftR]

yes this would be very simple to make and wouldnt really take much time.. you would just have to know what your doin... you could also cut out that back plastic part of the grill where the hood latch is a set up the same thing, only make a huge plastic/aluminium funnel that takes up the entire grill and connects to a single pipe straight to the TB

 

[SpicyMchaggis]

You'd have to go straight to the headlight, I tried to rig something behind my lower driver's side foglight housing, but the bumer re-inforcement was in the way.

 

[TXMazdaSpeeder]

yes this would be very simple to make and wouldnt really take much time.. you would just have to know what your doin... you could also cut out that back plastic part of the grill where the hood latch is a set up the same thing, only make a huge plastic/aluminium funnel that takes up the entire grill and connects to a single pipe straight to the TB

maybe if we could use a half sized radiator? i dont see anyway of getting the piping past the radiator short of a long flat tube over the crossmember/radiator like the stock intake

 

[Mike R]

You could easily make a housing that fits over an Injen intake filter and that takes air in from the foglight.

 

[Gen1GT]

I'm going to have to say that this won't work. Well, it'll work, but not well. It'll work with a race car, that's always running between 8-9000RPM, and is always ingesting air at a rate faster than the vehicle is moving. ie piston speeds are enough to suck in the air. But on a street car, with engine speeds not always that high, there are times when the vehicle would be moving faster than the speed in which the engine is moving. There would be crazy pressure events, and huge lumps in the powerband. There's a reason this method is rarely touched in the real world.....

 

[peepsalot]

But isn't the whole point of a true ram air intake, that you get some free air compression from the speed of the car? Lumps sound fine to me, as long as they are in the upward direction.

 

[goldstar]

But isn't the whole point of a true ram air intake, that you get some free air compression from the speed of the car? Lumps sound fine to me, as long as they are in the upward direction.

You're exactly right. One of the sought after aspects of ram air induction is to have the intake air velocity due to the ram produced by the forward motion of the vehicle exceed the intake air velocity due to the speed of the piston movement on intake alone, without ram. This enables air to build up under a slight pressure behind the closed intake valve, improving induction over that possible without ram effect. Of course, the greater the forward velocity, the greater the ram effect.

In order to benefit from the ram effect, it is necessary to reduce air velocity in order to increase air pressure. The stock air box, since it acts like a plenum chamber, aids in accomplishing this goal.

For a more complete explanation of this effect, go to: www.vararam.com

 

[Installshield 2]

All I will say is that the math involved to do it right would be tedious...sure you can make an intake like that, and it would benefit a few more hp, but mostly due to denser air...

Josh is correct...funny s*** starts to happen with ram air setups...regardless of implied theories, the pressure gradient shifts between the valves, the TB, and the intake opening creates turbulence and back tracking flow at certain points in certain conditions...and even at some points with a poorly designed system, you can create a gradient at the intake opening that can litterally collapse and pull air back out of the engine...obviously not what you are looking for...

I am not saying that is what will happen with sort of design...Just pointing out to do a good bit of research for this crap before you just hang out some piping in the open air...

 

[twilightprotege]

this is sort of what i already have. i did a how to (somewhere on this board, i cant remember) on how to cut open behind the fog light and to get rid of the metal behind the bumper (it does nothing). when the fog light is off, you can see the injen filter. all i'd need to so is make a plastic cone like thing and have it direct the air from the fog light area to the filter. done.

 

[twilightprotege]

linky : http://www.msprotege.com/forum/showthread.php?t=76444

 

[zmzmzm]

I seem to remember hearing somewhere that a ram air intake will yield about 1.5 lbs. of boost at 150 mph. For real world driving, that's not even measurable.

I'll see if I can find that real information, though.

Chris

 

[Installshield 2]

there are a ton of variables that need to be incorporated into how much pressure is created from a true ram air setup...Intake opening diameter, TB diameter, intake velocity and volume all play a part in it...you can design a system that will make great gains in a very small area at a very limited speed difference...and usually everywhere else it will hurt power...meaning you can use small piping to make great pressure increases at 70mph...but the piping would be too small for high rpm, and it would begin to cause negative affects shortly above 70mph...

 

[Powells85]

Some of the DSM guys run the headlight mod setup. This is just one I found real quick...

 

[Innu_Qc]

A thought I had about a ram air involved swithching a Mazdaspeed radiator for a regular N/A one. The reasonning behind it is that the MSP radiator is about 4-5 inches shorter than the regular one in order to make space for the OEM intercooler. When you replace the intercooler with a FMIC one and remove the old one you get a gap about 4 inches directly into the air flow and inline with the piping and TB. A regular SRI with somekind of ducting could work relativly easily like that. Or even a custom set-up from end to end.

Just a thought I had after seeing a MSP with is intercooler removed. Any thought anyone??

 

[twilightprotege]

the air would be traveling the hottest way (near radiator, exhaust, engine), but the idea has potential

 

[Gen1GT]

Another thing you have to remember, is that air pressure DROPS as velocity increases.

Imagine holding a large straw in your mouth while riding your bike. Unless you're sucking in air as quickly as you're riding, a high pressure bubble forms around the tip of the straw, and the moving air actually goes AROUND the straw, like it had a cap on it.

Or imagine air flowing into your intake tract at a high velocity because of the speed you're travelling. It may even travel slightly faster the speed of the piston. Now imagine all this air rushing in, and the intake valves close. Boom, huge pressure rise that can go no where but back out the intake.

These are a couple of the things that are nearly impossible to calculate for guys like us.

 

[Protege_Speed]

That sounds interesting but what about the cars that do offer a true ram air. My brother-in-law has a 2000 Pontiac Trans-Am with the WS6 package. Are you sayng that happens to his ram air at high speeds? How do they work?

Another thing you have to remember, is that air pressure DROPS as velocity increases.

Imagine holding a large straw in your mouth while riding your bike. Unless you're sucking in air as quickly as you're riding, a high pressure bubble forms around the tip of the straw, and the moving air actually goes AROUND the straw, like it had a cap on it.

Or imagine air flowing into your intake tract at a high velocity because of the speed you're travelling. It may even travel slightly faster the speed of the piston. Now imagine all this air rushing in, and the intake valves close. Boom, huge pressure rise that can go no where but back out the intake.

These are a couple of the things that are nearly impossible to calculate for guys like us.