Stock Intake mod..

[Shane5425]

I have stock intake on a 1.6l with a k&n filter, this might have already been posted, but i found a way to basically make the stock system a type of ram air, i can feel a small boost after 30 mph.. here it is.. pretty simple took about 3 min...

cut the rubber seal on the front of the hood in a section that is shown in the picture, i noticed that the seal basically blocks the intake inlet, after 30mph my exhaust is alot louder, and i can accelerate a lil bit faster..

 

[VPower]

Anyone done that before?

 

[Gen1GT]

Ram-air isn't something that can be done in practicality. It'll only work when the engine is sucking in more air than the speed of the air coming in. Here's a weak example, but the best way I can explain it.

Lets say that your engine sucks in air at a velocity of 60mph at 5000rpm. In first gear you might get to what, 35mph, so you're probably allowing it to work all throughout first gear. You would get maximum airflow around 5000rpm at 60mph. I would assume you'd get best power too. But once the car is moving faster than the air it's ingesting, it would create a highpressure bubble around the intake, and air would be deflected around it. Does that make any sense whatsoever?

Use an empty pop bottle as an example. Hold the top of the bottle 4 inches from your mouth, and blow air into it. Not much air enters the bottle. If the air had somewhere to go out the bottom, it would flow more air.

Let me put it this way. If it worked, then car manufacturers would use. Pontiac is all about 'marketing', which is why the RAM-Air cars make no more power than their counterparts(ie, the RAM Air Trans-am makes no more power than the same engine in a Camaro)

 

[Brian MP5T]

You will find that there are holes all over the intake for water drainage... Not likely to give anything in the way of performance, but it's like a placebo...as long as you are happy!!

 

[Installshield 2]

Ram-air isn't something that can be done in practicality. It'll only work when the engine is sucking in more air than the speed of the air coming in. Here's a weak example, but the best way I can explain it.

Lets say that your engine sucks in air at a velocity of 60mph at 5000rpm. In first gear you might get to what, 35mph, so you're probably allowing it to work all throughout first gear. You would get maximum airflow around 5000rpm at 60mph. I would assume you'd get best power too. But once the car is moving faster than the air it's ingesting, it would create a highpressure bubble around the intake, and air would be deflected around it. Does that make any sense whatsoever?

Use an empty pop bottle as an example. Hold the top of the bottle 4 inches from your mouth, and blow air into it. Not much air enters the bottle. If the air had somewhere to go out the bottom, it would flow more air.

Let me put it this way. If it worked, then car manufacturers would use. Pontiac is all about 'marketing', which is why the RAM-Air cars make no more power than their counterparts(ie, the RAM Air Trans-am makes no more power than the same engine in a Camaro)

I see what you are getting at...but in reality it behaves a little differently...In a true ram air racing setup, the high pressure bubble can be forced all the way onto the intake valves (once the TB is open, around corners and what not the pressure gradient pushes on the butterfly)...and every valve cycle a burst of fresh air is shot in by the entire ram air system...it is lathargically similar to what a turbo does...the greater the speed, the stronger the air "shot" with every valve opening...

But that is through tons of research with tapered intake tracks...in which the opening for the intake is much larger than the throttle body(s) and tapers in diameter inward...

The stock peices are way different than a racing setup though...and there are strange gradients all through it most likely...

 

[Shane5425]

but i can tell that my exhaust is louder, so it is just breathing better?? it accelerates smoother threw the gears than what it did before... i guess i notice it more cause i put a k&n a week earlier too.. but in all reality that seal is blocking the inlet

and thanx for explaining that too me , that is very knowledgable to know..

 

[Installshield 2]

are you sure you are not hearing simply more of the intake vacuum? Stock intakes are designed mostly to keep the intake "honk" at a minimum...Even small mods, like what you did, can create a noticable increase in intake sound coming from the engine bay...

It would take some more serious internal adjustments to notice anything coming from the post combustion, unless you changes your exhaust system too...

 

[Shane5425]

no , its just around 3000 to 5000 my exhaust has a louder humm than usuall

 

[Gen1GT]

Could have just changed the resonant frequency of your intake. If that frequency is similar to the frequency of your exhaust, the sound increases exponentially.

 

[Shane5425]

who knows, lol, i like the sound now... cold air intake ---- i heard it was having problems on peoples 1.6l automatics, is that true?? i know that they had a TB on the MAF and A reprogramming of the pcm, i got the new MAF and i can get the pcm programed anytime if that is the cuase of cai not workin right on it...

 

[20EVOLUTION01]

I have been running with this set up for a while now. I have felt increase in power throughout the 3000 to 5000 range. This is what I was expecting from my FS engine. I only wish I had a place locally to dyno my car to see how much in fact I have gained in power. I dout I lost power though. I have modified the front box to accept a real filter. Oh, and about the noise from the intake, its true. My engine's intake noise is loud. People thought I had a bigger engine in my 2.0 but it was all in the intake.

 

[Shane5425]

nice set up...

 

[20EVOLUTION01]

No one has this set up as far as I know. It is not out on the market yet for a Protege. I, you can say, used different intake parts from different cars. So far so good but who knows if the different sizes in tubes are affecting or improving the performance. Looks cool though IMO. Hey Brian I like your setup. I was looking at it. Does the header affect the temperature of you intake to the Intercooler from the turbo? It looks like it is really close to the header. But all in all it looks great, something custom. Keep it up.

 

[Gen1GT]

I have been running with this set up for a while now. I have felt increase in power throughout the 3000 to 5000 range. This is what I was expecting from my FS engine. I only wish I had a place locally to dyno my car to see how much in fact I have gained in power. I dout I lost power though. I have modified the front box to accept a real filter. Oh, and about the noise from the intake, its true. My engine's intake noise is loud. People thought I had a bigger engine in my 2.0 but it was all in the intake.

I won't be able to pass judgement until I see dyno numbers. I looks like rice so far though....

 

[andyfatsax]

If you want a good mod for the stk intake....take that whole assembly out, the inlet and pipe that runs across the top of the rad, the resinator box and the pipe that goes with it. When it is done you should have a hole right below your filter and it will suck more air in and then you will hear the difference in your exhaust!!!

 

[20EVOLUTION01]

I won't be able to pass judgement until I see dyno numbers. I looks like rice so far though....

I don't know if any power did come out of this mod but it sure feels like it. I only did it cuz I like to experiment on my car and try to find new ideas. I have many other ideas to still try with also utilizing the stock box as well. But so far no dyno test at this time.

 

[Shane5425]

also u cant dyno test somthing like that, how would u tell how much wind is hitting your car at a certain speed, all the test would not be accurate at all

 

[20EVOLUTION01]

also u cant dyno test somthing like that, how would u tell how much wind is hitting your car at a certain speed, all the test would not be accurate at all

(uhm) I know there are in car dyno's available. I am looking in getting the program for my laptop but need the cash. There are sensors that measure air speed you know. Haven't you seen where people test cars on race tracks and they get the information from the mobile system? I guess not. Yes, the dyno that is stationary is the best but the mobile system should be accurate to a point or else they would not have them.

Man, didn't take long for someone to bash the idea. Oh, well. (piss)

 

[Gen1GT]

Take it to the track then.

When I put on my RX7 AFM, it felt faster to me. I ran smooth and well, and I got rubber easily in second gear. I put it on the dyno, and I was actually 7 HP DOWN! Gah. I had 114.9 before, and now I had 107.5. We played with the flapper door tension, leaned it out, and I left with 117.2.

My point? Butt dyno don't know s***.

 

[Shane5425]

lol.... if id go to the track i would feel dumb .. all the people that go to the track have classic cars with V8/s and blower motor sticking out the hood.... with tires that stretch the entire lenth of the rear end... they pull 10s and lower.. id be pushing it if i got 17s