Will removing the intake trumpet improve gas mileage

[epj3]

My question - as odd as it may be.... Since cool air is denser than warm air (which is why you feel like you get more power in cool weather and why your gas mileage goes down in the winter), if I remove the intake trumpet (part #10) which is designed to draw in cool air from outside of the engine compartment, so it draws in air from the engine compartment, will there be any chance of my gas mileage improving?



It's far fetched, and I'm sure it wouldn't make a big enough change to make it worth while, but technically shouldnt it be different assuming you'd pull in warmer air?

 

[mjbst111]

worse gas milage because of cooler air (more air)? I would think the opposite like having a clogged air filter that makes worse gas milage. More air is better is it not?

interesting.....

 

[Chesty Bonds]

Yeah if you're pulling warm air into your filter from the engine bay you should lose power whilst simultaneously having a negative effect on your fuel economy. Unless i'm completely misunderstanding what you wrote...

 

[E30 318is]

Yeah i would have to agree with Chesty.

Cooler air would def not harm gas mileage.

 

[aNoodle]

Yeah, cooler is air is more dense, packs more punch when it gets in the cylinders. Warmer air is all excited and more spread out...so you get less bang for your buck. Section8 explained this to me better than I can explain it. But that's why when you read in comparo's sometimes they note that one car was tested on a different day and the temperature was different, so the comparo is not entirely perfect.

Interesting though, I removed my air deal a couple days ago...the picture below is your Part #1 on a 2.8L E46...I was looking down below to see if the hoses were all right. Man, was that thing dirty (a couple bugs and a bee met their death there). How did all that sand get in there? I took it out and gave it a good bath.

BUT NOTICE the auxillary or secondary (whatever you want to call) extra hole that draws air from the engine compartment. It's just on a spring (picture with my finger). It's not controlled by electronics or anything. And I noticed, where the filter sits on top of that, it doesn't open that much cuz the filter is mostly clean there. Anybody know how this works....is it just under high rpm that the suction would force open the extra valve and give the engine more air? If you took off the intake trumpet, then it would be like drawing all your air from this extra opening?

 

[epj3]

Notice I'm not talking about power!!!!

Remember, your engine tries to keep the 14.7:1 air:fuel ratio. When air is cooler it is more dense, so your car computer uses more fuel. This is exactly why you get more power when its cool out. I'm saying, if i took the trumpet off (which is designed to pull in cool air), so it would pull in warm air, wouldnt I get an increase in gas mileage?

 

[aNoodle]

Notice I'm not talking about power!!!!

Remember, your engine tries to keep the 14.7:1 air:fuel ratio. When air is cooler it is more dense, so your car computer uses more fuel. This is exactly why you get more power when its cool out. I'm saying, if i took the trumpet off (which is designed to pull in cool air), so it would pull in warm air, wouldnt I get an increase in gas mileage?

Oooohhhhhh...now I gotcha.

Well, hmmmm....good question...I don't know...here's what the ricers are doing to their preludes....

"~Free Intake Mod.
-To Remove your Air Intake Resonator....Most are found in the inner fender wall off your front fender. Locate your intake and find out where the filter is. Look to see if connected to a pipe that goes off to either in wheel well or wraps around front of car like a horn.(not the pipe that goes towards engine. When you take out either of these, it will allow more air to come into your intake and if it is taking it from your fender, it will be cooler more dense air. This will allow better combustion and a slight increase in power and more ricer noise. If you install a K&N or other "Drop in" filter at the same time, you will notice an increase in power." (emphasis added) http://web.ics.purdue.edu/~mfeldhak/free.htm

Some people just put those K&N filters right up top near the engine....

 

[epj3]

Oooohhhhhh...now I gotcha.

Well, hmmmm....good question...I don't know...here's what the ricers are doing to their preludes....

"~Free Intake Mod.
-To Remove your Air Intake Resonator....Most are found in the inner fender wall off your front fender. Locate your intake and find out where the filter is. Look to see if connected to a pipe that goes off to either in wheel well or wraps around front of car like a horn.(not the pipe that goes towards engine. When you take out either of these, it will allow more air to come into your intake and if it is taking it from your fender, it will be cooler more dense air. This will allow better combustion and a slight increase in power and more ricer noise. If you install a K&N or other "Drop in" filter at the same time, you will notice an increase in power." (emphasis added) http://web.ics.purdue.edu/~mfeldhak/free.htm

Some people just put those K&N filters right up top near the engine....

Thing is - the end up LOOSING power!! Heheheh idiots.

 

[xLibelle]

eric... youre just contradicting yourself, talking about better efficiency and wanting power(?).
you might get better efficiency, but its really a pointless notion because of the lack in which the effect would matter.

item 10 is called an intake bellow. the trumpet is inside the airbox, something everyone should remove anyway.

you want better fuel economy? tape over half the intake inlet. ...maybe you should ahve bought an E. ...why are you looking for the lamest of ways of gaining fuel econ. while imparing your power anyway?

 

[Kirby]

Notice I'm not talking about power!!!!

Remember, your engine tries to keep the 14.7:1 air:fuel ratio. When air is cooler it is more dense, so your car computer uses more fuel. This is exactly why you get more power when its cool out. I'm saying, if i took the trumpet off (which is designed to pull in cool air), so it would pull in warm air, wouldnt I get an increase in gas mileage?

I don't think so. Yes, warm air is less dense, so the ECU (via the MAF) will decide to squirt a little less fuel. BUT you will also get less power, maybe 1 - 2 hp? So to maintain a given speed, say 50 mph, you will have the throttle pressed down slightly farther, therefore letting in more air, therefore using more gas. Can't change the rules of stoichiometry!

The best way to save up to 10% gas is to just use a very light foot on the gas pedal when accelerating, like 0 - 30 in 10 seconds. Of course, how much fun is that?