azn5ucka86

do intakes improve gas mileage?

Tuboz

or so they say.
your car tends to run lean with more air in the combustion chamber. so you get more miles out of a gallon.
you car will run rich with an intake/exhaust combo.

-tuboz

mr. big

thats what they say, but....whenever u are in a situation where a mod increases your horsepower, HP gains equates to more fuel burning....Thus, i dont believe what they say.
Thats what the shop told me too, before they sold me the intake

I had an AEM CAI, for my 1st mod, and so i did pay particular attention to the gas mileage after. Before CAI, i was ranging 320-350 miles with a full tank, on a V6 accord. After CAI, i was ranging 275-285 per tank...And i did not drive any faster.

I did infact notice a slight increase in HP, which eventually results in more fuel consumption

mr. big

after the CAI, i installed an exhaust, and once again, felt more power, and noticed that my mileage dropped to about 260 per tank....HOLY SHIT was i surprised....headers would have put me over the top!!

After removing all the mods, my gas mileage went back up to 320 miles per tank

Nashua_Night_Hawk

the more HP you have the less MPG as easy as that... now if you have more HP and drive less aggressive you may get better MPG... but slightly...

Nashua_Night_Hawk

winter gas will kill MPG more than your mods.

Simpleman

When I put the DC Sports ram intake on my 92 Accord, I got an add'l 50 miles out of my tank.

azn5ucka86

yea my friend has a cold air for his 4cyc 00 accord, he says he hasn't noticed any mileage gain either, hmmm......so i'm guessing there isn't much mileage gain, the HP part makes sense, but i thought it was because there was a better oxygen to fuel mixture, not due to "more" gas

Pappy

Hmmm, I may be wrong but doesn't stand to reason that a better air induction system,headers and freer flowing exhausts would give you better gas mileage? After all, the engine has improved breathing. I can see where the air induction would use more gas, but maybe the headers and freer exhaust would offset it? The computer would also automatically reset for this change as well. I don't see how there would be a noticable difference in the gas mileage.

Six Shifter

Well, let's try a mathematical equation on this one and see what we get:

Increased breathing + better exhaust / heavier foot = reduced miles per gallon.

If you can control the third factor, you might be able to improve the overall result ... but the mods and the feet seem to go (ahem) hand in hand. just a thought

liquid_x

i noticed better gas mileage after putting in my intake under normal driving conditions

6spdmanual

Technically, I believe it will improve the gas mileage. But after I installed the CAI, I drive it harder than before, so the mpg is actaully worse in my case.

Sly Raskal

iTrader: (1)

When i put my DC Sports DAC intake on my integra gs-r, i got an additional 30miles per tank on the freeway as well. and i did not drive any slower or faster. And when i added headers i got an additional 30 miles per tank.

BlueCLS6

Yes, in general whenever you improve the airflow through the engine, you increase it's Volumetric Efficiency. So as long as you drive the same, gas mileage will increase. My Accord for instance is rated 24-30mpg from the factory, but after mods I am averaging 30.9mpg with a best of 37.5!

Python2121

My brother drove down to texas for school during the fall (with the help of his friend in his car) and he got amazing mileage. He has an integra and he put an intake on there, and with 3 duffel bags and a 170 lb passenger he managed 39 mpg going 75 without stopping once.

mr. big

Well, they fucked me over on mileage...anything that adds power will dip into ur mileage. unless of course u drive like a granny

Sly Raskal

iTrader: (1)

not everything that add's power will dip your mileage, and you don't have to drive like a granny to improve mileage.

4 people here have added intakes and have said they didn't drive hard, just drove NORMAL, and their mileage increased.

in addition, upgrading the ignition system, new coil, ignition box, plugs and wires, adds about 5 hp, but it improves the burn in the combustion chamber thereby equating to better performance but better gas mileage because it's a cleaner burn at that, it even says this on MSD's website! and it's been proven by countless other people too. so by adding a peice of equipment to your car doesn't always dip into your mileage. it's all in the way you drive.

the car's estimated mpg are done by if you drive the car normally, they would be better if you drive like a granny, and worse if you drive it hard.

sorry it just really bugs when people assume that something is always the case just because it's happened to them when they haven't seen all the other facts that are out there.

VTECPOWER

I just read a car magazine...for improving hp and mpg(highway), here r 2 choice:

1. If ur car is bone stock, no need for intake....Just a drop in air filter will do.

2. Or header+intake(or short ram)+exhaust will be A+++

Sometimes I don't understand why people r willing to spend thousands $$ modding their cars but still CARE about little things like gas $!

For hp and speed followers, wake up ur racing blood...go for it(having fun) but still drive safe and NORMAL.

For mpg followers, light weight ur car!!! and do slyraskal said
"upgrading the ignition system, new coil, ignition box, plugs and wires."

Please correct me if Im wrong

mattg

on top of that the cl-s has no coil or wires

BSK181

its funny you say that, i am getting about 10% better mileage now then in the summer
??????????/

Sly Raskal

iTrader: (1)

this may be because there is colder air going into your engine...i've noticed this in my car as well and the engine runs cooler too.

Sly Raskal

iTrader: (1)

actually, the cl-s has 6 coils, but no wires.

each spark plug has it's own ignition coil. I forget the special term they give this setup. but if you look through your helm's manual, you'll see that there is in fact an ignition coil located on top of each spark plug.

mmmm

Better or worst MPG with or without an intake depends on several factors including type of intake, driving style, driving conditions, other mods, etc.

Sly Raskal

iTrader: (1)

that's what some of us are saying, but some people are saying that ANY mod automatically reduces mileage no matter what which is ummmmm...

TRIFFSABRAT

First, for any comparison to be meaningful, all factors must be accounted for and equalized. These include total engine running hours (if not broken in), barometric pressure, temperature, humidity, tire rolling radius, wind velocity and direction, AND vehicle speed. If ALL factors are accounted for, a fixed amount of horsepower will be required to maintain any chosen speed. This is the horsepower required to overcome air resistance, rolling (drivetrain) losses, tire friction losses at that speed, bug impacts, etc..

For example, you might find that cruising in sixth gear at a steady 75 mph, over a level 100 mile level stretch of road in Arizona yields 26 mpg. Perhaps 75 mph corresponds to 2,500 rpm. The power required to maintain that 75 mph might be 35 hp.

Now imagine making intake/exhaust modifications that improve the net horsepower for your engine at 2,500 rpm. This is a horsepower increase that occurs at wide open throttle (WOT). If more horsepower is available from your engine (at 2,500 rpm) than is required to maintain a steady 75 mph, you will accelerate if you do not operate at a partial throttle opening.

If improvements in intake/exhaust efficiency have been made, it's likely that maintaining the baseline 75 mph will require a SMALLER throttle opening. Doubtful that this could INCREASE fuel consumption.

As a point of reference, I recently conducted a non-scientific test of my 2003 CL 6-speed. The only modification is a Comptech header. Cruise speed was 75-85 mph over a 200 mi. course that involved little elevation change. Fuel consumption for the trip was 30.7 mpg. Pre header, the best consumption I had achieved was about 26 mpg.