Does the Open Air Filter and CAI really work?

Let's search for the answer to the question of whether the Open Air Filters (PODs) really work. It is the cheapest and easiest modification open air filters that many of us think of first and apply in the first place. Our aim in doing this is to think that the oem filter in the suction and the filter bowl bring a restriction, clogging, constriction to the air intake. We remove the complete filter bowl and replace it with an open air filter. Our main goal in doing this, that is, installing an open air filter, is to get more power with more air flow. Most of us also think that the quality of the open air filter and the amount of air flow will increase, thus increasing the power output. When making this simple modification, we usually install the open air filter in place of the air filter box, that is, a place where hot air will suck through the bonnet. However, the air supply of the oem air filter is usually provided by pipes that will absorb air directly from the front grille. The video below is tested on a 1.3L atmospheric variable valve timed electronic fuel injection daihatsu engine. First of all, as we do most, the open air filter is installed directly in the oem air filter box. And a cheap filter on the market is tried first. Two tests are done and 66hp and 67.6hp are powered. Then the $ 80 filter, which is considered to be quite high quality, is tried, and 68.7hp and 69.4hp power is taken. What about the result with the OEM filter and filter boiler? The highest value with 69.8hp ... Leave the Oem filter, the insufficiency in the top revs gives better results than the most expensive filter. However, the differences between all these trials are not noteworthy, noticeable or a high return can be mentioned. The variation in all different combinations does not exceed 3hp, and the highest value is achieved in the OEM system, which does not have a cold suction in the OEM system of this car directly. So the oem system gets the air from under the hood, but from a slightly colder side. Of course you can say "this car is atmospheric, 1.3L engine, it doesn't need much air anyway. Of course there is no difference, you should try it on a turbo engine too. "In the continuation of the test, the same test is carried out in an ej20 boxer with STI turbo, large injector, complete straight pipe and remap. Our expensive open air filter is replaced by the OEM air filter box first. The result is 210.7hp first and then 204.3hp successively, which is a good example of how variable dyno data can be. Then OEM filter is installed with OEM box. The result is 207.8hp. In other words, it is the middle of the values with open air filters, that is, the same. Then a $ 120 oil can filter is tried. Meanwhile, the problems that oily filter can cause are also mentioned. The result is 207.3hp. In other words, there is no change, even a little drop of power. As a result, the atmosphere is lost with an open air filter. There is no significant change in the turbo engine. In other words, while the open air filter regresses in the stock engine, only the same level of power can be obtained with the oem filter in a loaded engine. [TUBE] paıxequsg-Q [/ TUBE]

Let's go to CAI, Cold Air Intake, cold air intake ... Now you can read the above message and watch the video and say, "Well, unless the open air filter sucks the air from the cold place, the real power increase will be provided if it is installed in the right place." Now it is time to test it. There are two types of CAI; - In a corner far from the heat of the engine, a suction is provided from the fender or bumper, but still from the inside of the hood - directly outside the vehicle's hood, generally from the headlight, and speaks of these are mentioned, with an increase of up to 20%. The members in the video say that if the CAIs have 5% or 7% return, we will say buy everyone a CAI. This time, our test vehicle is the skyline. There are 2.5L inline 6 cylinder turbo engine in the tool. OEM air intake is attempted first, and of course, like most vehicles, there is a small snorkel in the air intake that supplies air from the louver to the air filter. 222hp and 227.5hp power is obtained with the OEM system. They remove the oem filter and install the open air filter somewhere behind the headlight in the tip corner of the bonnet that most of us would like. The result is 224.8hp. So it's a lower value than oem filter. Moreover, the air in the suction increases during the dyno. Then they remove the complete filter and measure the filter to prevent any limitation, obstructive effect and strain. With 222.5hp and 225.8hp, the result does not change, and a clean air filter does not seem to interfere with suction. In other words, if you install the filter that applies the least resistance to it, the power you will get is still lower than the OEM filter. "But it's still in the hood. We're piercing the headlight for this purpose." You might say. We try it out immediately ... They remove the headlight, install the open air filter just behind the headlight and supply cold air with the fan from the front. Just by simulating road conditions. The result is 227.7hp. So same with oem. In the trial without headlight, the suction temperature remains constant. But it is not reflected in this power. Because with this little suction temperature difference, the temperature after the turbo does not change. Then they seal the open air filter and cover it. They just make it fed from the bottom with cold air. The result is even worse 223hp and 224hp ... Again worse than oem. Almost the same curves in all trials are obtained with very small differences. Of course, the differences between the open air filter and the CAI are impossibly small when using these differences. Since we did, they say let's try the most hardcore, and they remove the headlight, extend the filter outside and put it directly in front of the fan, so how much it is possible to walk outside the filter is discussed in real life. The result is a power of 232.4hp. The highest power achieved with the OEM system was 227.5hp. So the maximum power achieved by such a hardcore CAI application in such a car is 1.7%. In other words, a noticeable return cannot be achieved even in the setup which is impossible to implement in real life. [TUBE] gCi2yo4UqPI [/ TUBE] My note is this: As long as the open air filters remain inside the hood, they do not provide a return. When they get out of the bonnet, it does not yield enough to be taken out of the bonnet. If you have an IAT problem, you should try Water / Methanol injection or a larger intercooler. ALINTIDIR .......

thanks for your effort. You shared a very good information. it is interesting that it should be the most talked about thing.

[QUOTE = furkanyakar] health to labor. You shared a very good information. it is interesting that it should be the most talked about thing. [/ QUOTE]

[QUOTE = TuNeR_32] [QUOTE = furkanyakar] health to labor. You shared a very good information. it is interesting that it should be the most talked about thing. [/ QUOTE] [/ QUOTE] is at least helping yourself. more information does not cause brain ehehe: D

[QUOTE = furkanyakar] [QUOTE = TuNeR_32] [QUOTE = furkanyakar] health to labor. You shared a very good information. it is interesting that it should be the most talked about thing. [/ QUOTE] [/ QUOTE] is at least helping yourself. more information does not cause brain ehehe: D [/ QUOTE]

Thank you, my friend. There is no need to break the original, which we will understand from here. In the meantime, the sound in the open air filter affects us psychologically and makes us think that the vehicle is stronger.