I think to make a complex topic more simple, the ultimate answer is pick the direction you want to go in.. Its not a required modification until your a little later in the game, if you like the way it sounds, then get the intake, it may or may not offer any increase in performance, but its certainly not a waste of money in the end.

Good enough answer?

 

Dont believe everything you read on this post.

Here are some air temps measured in the plenum & air temp going into the air box at the same time using an exposed junction k-type thermo couple: 28c amb / 41c plenum, 33c/48c & 37c/56c.

The Air temperature going into the airbox does influence the airtemp in the plenum.These numbers are real.

The quote above comes from someone talking out their ***.

Here are some more temp numbers: The temperature between the airbox & upper rad hose was 70c, with an ambient of 39c. The temp near the headlight / airbox area was 49c. If you were to pull the airbox off, who know's what air temp you will be getting. It will suck hotter air in the summer & colder air in the winter without the airbox.

Hopefully this helps you out.

 

Im confused translate into english. Malubujack I know without tunning a open element Intake dosent make that much different but with tunning it should help quite a bit. I love this about evom one person says one thing than other says he is full of ****, its almost impossible to know what answer is correct.

 

Put similar thermo couplers in your evo & find out for yourself & then post your results!

I am posting data that I have personally gathered. Thats all. In reference to saying that 60 or 100 degree air doesnt matter.........is bull**** proved by the data above.

Besides, I am certain that everyone reading this can attest to their cars have run harder in the cooler nights / mornings then during the heat of the day.

 

WOT is absolutely correct, there is a difference in temp, where his opinion differs from mine is that I don't feel that a majority of the time its going to make a huge difference in performance, and the unrestricted flow of an open filter at higher performance levels will outweigh the benefits of the cooler air and a restrictive stock intake. This is partly the reason my opinion is that you should choose whether you want to make this a first mod or not.

If you choose the open filter, you can aid getting cooler air into the location by leaving the snorkle attached to the leading edge of the radiator support so air is blown over the filter. The location of the filter is in an area where when your moving, it will get cooler air than what is under the hood. He is right though, on a hot day, fresh air will be cooler than air under the hood.. but if your moving I don't know that to be much different.

The efficiency of the Intercooler will have a bigger effect, part of the problem is as you force more air through the intercooler, it begins to become a restriction, and then you have to balance restriction and cooling efficiency since moving air through it too quickly will also not have the desired results.


Ultimately this particular topic ALWAYS sparks a debate, mostly its differing opinions.. mainly because its difficult to get definitive numbers using a chassis dyno since your not "Moving" And therefore creating the aerodynamic forces necessary.

His thermocouple analysis is valid, and can be tested by placing probes in different locations. However I had tried this, I put a thermocouple in the intake box, and then did the same test with the aftermarket filter.. There was definitely a difference in temp, but it was only dramatic when you were standing still, once you were moving it was different, but not dramatically different (THis was in a cool day in april so results during the summer will certainly be different)

However most tuners seem to feel that the open filter offers more benefits than tradeoffs in temps.

If your really on the fence about using an open filter, then hold off on it for the time being and get a K&N Panel filter for the stock air box.

Getting cool fresh air into the engine NEVER HURTS.. and if at all possible it SHOULD be the way to go. We just don't have many alternatives at the moment.

 

Absolutely. Turbo chargers work on pressure ratios. When you read a compressor mad and pick a pressure ratio to compute at, you are always makeing the stupid mistake of assuming the compressor inlet is going to have a pressure ratio of ambient. This is sill. In a 1g dsm, the pressure with a stock intake it barely over 11 psi...(IE would register vacuum)...but with an intake setup and open k/n filter its about 13 psi. That is a significant difference in how fast the compressor has to spin in order to create the same boost in the intake manifold, and the slower the compressor on anevo spins, the better.


So now we have 2 very important reasons why we want an intake. we need cold air, and we need it at the closest to ambient presuure as possible....we don't want rubber!

 

I agree with WOT...

Sorry, I know you wanted more of a technical response with hard data, but I think some of you guys get carried away with all the "quantum physics".(lol) Not to mention some of the pissing contests which ensue shortly there after. I don't care what all the rocket scientists say out there. Your car will run better (turbo or not) and produce more power with MORE cooler AIR. Now that's a FACT!

 

I also agree.

With an open filter the air will be warmer because of it's location. Does the open filter gain power, or lose power.

 

Wrong, it kills throttle responce. Hot air = less power = ****ty throttle responce.

 

Well, I guess that depends on the actual location of the air filter. Funny, this is the subject of much debate in the Grand National world. Some guys say put it down by the ground. Some guys put it directly behind where their bright light (was) so it's not close to the ground.

I myself went with the AEM intake. One thing I liked about it is that it did come with a heat shield. Now I couldn't tell how good it works, but the theory is sound. The best solution in my mind would be to completely isolate the air filter from the engine compartment altogether. That's why I chose to go with a cold air intake near the ground on my GN. Maybe one of the vendors we have here will come up with the same concept (I would probably buy it). GIVE YOU ANY IDEAS VENDORS???

 

I bet that in certain situations, an open filter will produce the best power. However, as somebody posted above, it comes down to what you want, your stage of tune & what your willing to spend.

I forget which vendor has posted on their site, that the open filter doesnt produce anymore power with a basic set-up!!!

 

Both, depending on your current ambient conditions!

 

I have the aem intake. Well, any gain? I'm not sure it I actually gain anyting, but for sure I pull hell of alot harder when driving in 4th to 5th gear. Stock evo bogs like crazy in those gears, but after the intake and a catback upgrade, it actually felt alot better. As for losing, I dont think so. It idles perfect like stock and no bogging off the line during normal driving. As for the cool factor, I think it is pretty cool. It is pretty awesome to hear your turbo spool up and that whoossss sound from the bypass valve. I heard alot of possible things about the greddy s combo with the aem intake. That's my plan and it well worth the money. Peace...

 

Negative, many of the evo owners with the open element intakes all say they have way better throttle response.

As for the cold air intakes APS makes one that just came out not to long ago. www.airpowersystems.com.au

 

My 1cent

I added a regular K&N cone filter and felt less power.

I did a before and after with stock and K&N cone ...And just to make sure butt dyno wasnt screwed up I had my bud with me to test,he also said the same thing,that the car doesnt pull as hard...

Might be the possibility that I didnt let the ECU learn the new air flow but many have reported the same experience as me...


Stock airbox is good for over 400hp,better to do ecu upgrade or exhaust or even better get a dyno tune with the intake...

This is just my experience with open air filter on my evo...