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As I mentioned before, I consider installing the cone air filter. The problem is the OEM filter gets air from outside. The cone filter gets if from under the hood. If the under the hood air is much hotter, it will make it less condense and will reduce power of the engine. Simple calculations gives, that every degree Farangate (? spelling) will reduce amount of molecules by ~1/600. This should reduce power of the engine by 0.17%. For the 174hp engine every degree F will reduce power by 0.29hp.

Ok. So I put my Radio Shack thermometer in the engine compartment next to the place, where the cone filter would suck the air. The display is attached on the long wire, so I can keep right in front of me. The outside temperature, measured by the same thermometer is 82F. I mostly drove on the highway and found, that if I will keep my speed over 50mph, the temperature inside never will go above 85F. If I would slowdown up to 30mph, the temperature will go up to 88F - still not a big deal. But if I will stop on the toll plaza - it will jump up to 110F almost instantly. If I will stand for a two minutes with idling engine, temperature will become 134F!!!. But as soon, as you start moving, temperature will drop.

So the results of the tests are: during the driving (let us say above 30mph) cone filter would suck cool air, coming from the outside. If you will slowdown or stop for long time (more then a minute), air will heat up from the engine and engine with cone filter will loose ~8% of the power. It will regain this power very soon after you will pick up the speed. We still do not know, how much heat air picks up, when it travels inside of the intake pipes. But because, it does to the certain extent, we should expect less difference in the air temperature for cone and OEM filters.

So as a result I would favor the cone filter. And as we know from people, who installed the filter it does help.

Style12v

nice research! I wonder about the temp of the stock filter setup..

muhammadc

Sorry but since I'm about to leave, I don't have a chance to go check the temperature.

To access OBD:

Press and hold the recirculation button. Then press the manual flow control up arrow (top right, bottom right buttons at the same time). You should see a 1c. Press the temperature up ("+") or down ("-") buttons to select a code number. Then press the recirculation button again. The value should display. Press the temperature up or down button again to display another code. For channel 4, press the temp + button 4 times, then the recirculation button again.

BTW, the temps are in metric/Celsius.

See link...<ul><li><a href="https://www.audiworld.com/tech/int5.shtml">https://www.audiworld.com/tech/int5.shtml</a></li></ul>

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It was 82F.