Ram Air Intake Design, I got bored

[Gen1GT]

Let me put it this way. The 2000 Camaro SS makes the same hp and tq as the 2000 Firebird WS6 Ram Air. Both make 320hp and 345lb-ft of torque. The Camaro doesn't have 'ram air'.

 

[Installshield 2]

yeah that thing is the gimmick of the century...Very few street driven vehicles offer a true ram air setup...simply because of what we are pointing out, they are not very practical...purpose built race cars benefit from them in a lot of racing situations, but they too have their disadvantages...

Another point is that some will claim gains from a "ram air" affect...but in reality they are only benefiting from colder air...You will know you did an affective ram air intake when you are only gaining power at one small area and speed, and pretty noticably loosing power everywhere else...

Again not trying to sound like an ass or gang up on this idea...just pointing out the disadvantages, and agreeing with Josh on why they are not used usually for street cars...

 

[Installshield 2]

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.

Great point...this is a main reason for lumps in power and poor streetability...you can get back flowing turbulence through the intake manifold at every valve event, which causes a whole slew of problems....and although we are not talking about large pressure increases, we are also talking about a system that lacks a blow off valve...so at every throttle body closing the potential for stalling is high as the air rushes out the front of the original intake opening...albeit only at high speeds...

 

[peepsalot]

Ok here is the solution, you na guys should get ram air w/ blow off valves. Problem solved. (evil)

 

[Protege_Speed]

Don't turbos force more air than this setup? Why would this set up be so harmful? I thought blow off valves were used to protect the turbo's propellor from being stop from the backpressure of air when the TB closes. If anything, with this setup, the air would just wait until the TB opens again. No air should flow in the opposite direction, right? Pretty much like what Gen1GT said about the straw and air going around it. I think the other thing to take into consideration is the size of the scoop that collects the air. A scoop the size of the entire front grill opening should yield more air pressure than a small foglight opening. It would also probably have a negative aerodynamic effect as well. Have you guys seen this setup from arospeed? Not saying that this works but with some modification, it could become more of effective ram air setup.

Great point...this is a main reason for lumps in power and poor streetability...you can get back flowing turbulence through the intake manifold at every valve event, which causes a whole slew of problems....and although we are not talking about large pressure increases, we are also talking about a system that lacks a blow off valve...so at every throttle body closing the potential for stalling is high as the air rushes out the front of the original intake opening...albeit only at high speeds...

 

[Black Majik MSP]

I think the best NA option is the DGM ram air hood/AEM SRI combo. I am going to be trying a custom version of this on my MSP.

 

[Installshield 2]

Don't turbos force more air than this setup? Why would this set up be so harmful? I thought blow off valves were used to protect the turbo's propellor from being stop from the backpressure of air when the TB closes. If anything, with this setup, the air would just wait until the TB opens again. No air should flow in the opposite direction, right? Pretty much like what Gen1GT said about the straw and air going around it. I think the other thing to take into consideration is the size of the scoop that collects the air. A scoop the size of the entire front grill opening should yield more air pressure than a small foglight opening. It would also probably have a negative aerodynamic effect as well. Have you guys seen this setup from arospeed? Not saying that this works but with some modification, it could become more of effective ram air setup.

Stay tuned...It will take me a bit to get to this after my shower...

 

[akhilleus]

About the DSM setup. the reason that works well is that the filter sits not far behind the headlight normally. The distance isnt far. However on the protege setup the pipe length and bends would slow down any ram air advantage you had to begin with. On my Protege5 I had the filter in that compartment. In actuality there was space around the fog to feed air in. I also made some holes with screens on the plastic bottom piece to feed air. Finally I used the stock air tube, and routed it from just in front of the bottom of the radiator into that compartment. So at least these all increased air flow as speed increased, not ram but kept the filter well fed. The reason the DGM CF ram air hood is better though is because it feeds the ramed air at the hood, less distance to travel. But still the vent isnt that large. Its a cool idea and would look dope, at highway speeds you could also see a minimal gain. Would be fun to make too.

 

[Gen1GT]

Don't turbos force more air than this setup? Why would this set up be so harmful? I thought blow off valves were used to protect the turbo's propellor from being stop from the backpressure of air when the TB closes. If anything, with this setup, the air would just wait until the TB opens again. No air should flow in the opposite direction, right? Pretty much like what Gen1GT said about the straw and air going around it. I think the other thing to take into consideration is the size of the scoop that collects the air. A scoop the size of the entire front grill opening should yield more air pressure than a small foglight opening. It would also probably have a negative aerodynamic effect as well. Have you guys seen this setup from arospeed? Not saying that this works but with some modification, it could become more of effective ram air setup.

I'll bet this would work well on the dyno though.....

 

[PR5Matt]

Don't turbos force more air than this setup? Why would this set up be so harmful? I thought blow off valves were used to protect the turbo's propellor from being stop from the backpressure of air when the TB closes. If anything, with this setup, the air would just wait until the TB opens again. No air should flow in the opposite direction, right? Pretty much like what Gen1GT said about the straw and air going around it. I think the other thing to take into consideration is the size of the scoop that collects the air. A scoop the size of the entire front grill opening should yield more air pressure than a small foglight opening. It would also probably have a negative aerodynamic effect as well. Have you guys seen this setup from arospeed? Not saying that this works but with some modification, it could become more of effective ram air setup.

That is so f***'n Ricer Gay!