Does New Intake get better mileage

[pLUGSNEt]

why such low overall miles per tank 300???... mine gets over 400 miles per tank easy.... is your california spec galant? cuzz mine is if that even matters?

[Darkkend]

<div class='quotetop'>QUOTE(pLUGSNEt)</div><div class='quotemain'> is your california spec galant? cuzz mine is if that even matters?</div>

I forgot who mention it, but all 8gs from before a certain year are cali spec.

[Koncept]

i just finished taking a road trip, and i noticed from full to 1/4 tank left was about 350-370 miles. just have intake/catback on the i4, and i was averagin over 80 mph most of the way.

[mochanges]

<div class='quotetop'>QUOTE(Darkkend)</div><div class='quotemain'><div class='quotetop'>QUOTE(pLUGSNEt)</div><div class='quotemain'> is your california spec galant? cuzz mine is if that even matters?</div>

I forgot who mention it, but all 8gs from before a certain year are cali spec.</div>

Other way around. All 8gs after a certain are cali spec. I wanna say after the 2000 model year but I am not sure.

Intakes, if driven the same way, can be more efficient. Many don't experience this because they always gun ti to hear the noise. But the bottom line is that most well designed aftermarket intakes are more efficient in delivering air into the engine. The stock intake is full of bends and snokels/resonators to keep engine noise down. Just as with an aftermarket exhaust, those bends have to be made smoothly and as straight as possible to increase efficiency.

See this http://www.sportcompactcarweb.com/projectc...2scc_proj200sx/

This was written by Mike Kojima and he knows his shit very very well. If you don't know who he is, google him.

For those that don't want to click the link, here is what it says:

Intakes reduce pumping inefficiencies, and exhausts increase exhaust scavenging.

Now none of this applies to a Galant if the intakes aren't designed well. I have read many comments that say "oh just stick a pipe with a filter on the end and your done." This is incorrect. The length of the pipe does matter. Pipe lengths are designed to create a resonation/pulsation that is similar to a suparcharger. This is the way that Honda tuned the older CL Type-S to make more power than the regular CL. Look here:

http://www.thecarconnection.com/Vehicle_Re...S183.A1068.html

So, assuming the intake you are using is designed properly, it will probably, if driven the same way as you drove with your stock intake, maintain or increase your gas mileage.

[solofantasy]

Hello, guys, i just got a Short RAM with AEM dry. filter. ( i got it really cheap from a friend)

hmmmm, i heard yall's opinion. Worse mileage hmmmm?

i dont really have the money to pay for extra gas. so, should i put it on? i can never get an answer right? i mean, some ppl say increase MPG, some ppl say Decrease MPG..... i might as well try it for one tank.

reset ECU right? 2 hours?

[Xrs2]

I think it all comes down to how you drive. I have I/H/E on the V6, and no tune (so I'm running rich as hell) I can use 1/4 tank of gas on my way to school 40 miles (no I'm not joking)

But If I take it easy, well thats another story.

[6G72gearhead]

If there is less restriction on the intake then it requires less of the motor to draw air in, which will increase fuel economy. The reality is that most people who are putting intakes and the sort on their car arent driving them in the most efficient of manner.

[peanotation]

this isn't rocket science...

MORE AIR = MORE GAS

just because the engine doesn't have to work as hard to draw in the same amount of air doesn't mean it's going to say "hm, because i dont have to work as hard i just won't draw in as much fuel now, i'm in lazy mode".

at idle, the filter is allowing more air to enter the engine, and the ecu adds more fuel. you have simply created a more efficient and powerfull combustion; also the theory that the car doesn't have to climb RPMs as long to reach the same speed because of the increased power is bs because MORE POWER = MORE GAS

[6G72gearhead]

The key is "drawing in the same amount of air" if its drawing in the same amount as stock, why would it need more fuel. More power is not always more fuel the free'r the crank and valvetrain spin the more horsepower will be put out. To truely add power though, yes, will require more fuel, but by increasing the efficiency of the rotating mass and the resistance on the motor through acessories or less intake or exhaust restriction will yield more power without having to add fuel.

[DOHCstunr]

The key is "drawing in the same amount of air" if its drawing in the same amount as stock, why would it need more fuel. More power is not always more fuel the free'r the crank and valvetrain spin the more horsepower will be put out. To truely add power though, yes, will require more fuel, but by increasing the efficiency of the rotating mass and the resistance on the motor through acessories or less intake or exhaust restriction will yield more power without having to add fuel.

your mass airflow meter measures every gram of air coming into the motor.
if there is less restriction, and the engine draws in more air for the same amount throttle,
then the ecu will give more fuel to maintain the desired a/f ratio while in closed loop.

open loop it doesn't matter.

the key here is that most of you guys who put on intakes floor it all the time(and don't lie)
so you get worse mileage, or you give it extra throttle so you can hear the cool sound.

but lets say you burn through 15 gallons of fuel on the highway and a normal(within closed loop parameter) speed like 55mph. and you were to leave it in cruise control and not touch a thing.

less restrictive intake would achieve better mileage.
then 15 gallons with the stock intake system.

do this same experiment on a honda and its a significant difference.

honda's run speed denity.
so their whole tune revolves around manifodl pressure, intake temp, and the hard volumetric efficiency numbers(in the ecu itself)

when you add an intake or an exhaust to a honda, you change the volumetric effieciency.
so on a honda since it doesn't actually measure the air coming in(just measures the air density(variable) times the liters per rev(constant: 1liter/rev on a 2.0L) times the determined volumetric efficiency at the given rpm:constant)
so when you add a less restrictive filter to a honda or any speed density equippped vehicle, the engine ends up drawing in more air than the ec is accounting for.. leaning up the mixture which of course increases power, and increases mileage)

you can't fool a mas though.
it measures exactly what goes in no matter what. and assigns fuel accordingly, so on a mas equipped car again===> more air = more fuel

[mikedela]

with my setup, header, flex pipe, hiflow cat, injen cai, 2 1/4' piping to a high flow muffler, i actually do bad in the city, but on the freeway, on the long run, my i-4 8g runs really good, close to over 320 miles per tank! when running stock, i was only averaging 299-305 miles per tank.

you guys normally get that many miles per tank???? im getting 275 and i never dog my car at all...all my tires are inflated correctly ...ihave a short ram aem intake but thats it.......i do have heavy rims though its a big block of chrome (ivemetal 888's) ive notice a drop in gas milage since i bought them but that was like 3 and a half years ago....i also change my oil be 4 3000miles and i know im due for a tune up. do ya'll have light rims or stock? ALSO WHAT KIND OF SPARK PLUNGS DO YA'LL USE I HAD BOSCH +4, AND NGK IRIDIUM I THINK HA HA BUT WHAT DO YALL USE? I WAS ALSO THINKING ABOUT THE NEW BOSCH SPARK PLUGS THAT THEY CAME OUT WITH WHAT DO YALL THINK?

[6G72gearhead]

But then does it still classify as drawing in the same amount of air.

[seth98esT]

But then does it still classify as drawing in the same amount of air.

Depends on the RPM. Higher RPMs will draw in more air, idle will not.

[milo111000]

depends how trigger happy you are. having that swoosh sound the vroooom factor, makes you wanna kick it more... but technically, prolly a little bit better than stock..

[6G72gearhead]

Depends on the RPM. Higher RPMs will draw in more air, idle will not.

If its pulling in the maximum amount of air the engine can draw in then adding an intake is not going to increase the amount of air flown into the engine. Realisticly the factory intake will not flow the exact same amount as a new intake.

[DOHCstunr]

If its pulling in the maximum amount of air the engine can draw in then adding an intake is not going to increase the amount of air flown into the engine. Realisticly the factory intake will not flow the exact same amount as a new intake.

its all about volumetric efficiency.

the engine will not be drawing in the maximum amount of air at pretty much any rpm on an n/a motor. V.E. varies from as little as 65% to as much as 93%.
intakes allow for more air to be drawn in at the same rpm depending on the load. at closed throttle the only air coming in would be the air the ecu allows to bypass the throttle plate via the IAC. so weather you have a giant funnel or a sea snorkel, the idle will be the same.
once you open that plate though, things change.

although its not a perfect world, adding an intake won't increase airflow at every rpm@every load, in fact there may be a few points where the factory setup might outflow an intake, but of course these points will be nowhere near the upper powerband.

[heeroborn1016]

dohc your my hero. the amount of air doesnt change at idle your right. but what about a reflash or changing the maps this would run a different A/F ratio balancing out for the extra air, right? besides the MAS reading something different and changing the A/F rtio on its own, i mean this is why some people dish out the big buck to get piggybacks or standalones so they can change on the fly, right? if they can compensate when not gunning or lets say speed racer mode then they should recieve more efficient gas milage maybe not in a city environment(esp if you have a short ram) and also we all live in different cities, newyorkers i bet get the worst and LA might not ride so well in the middle of the day and i know it gets pretty Fuk!ng humid in FL so all of those different conditions will give out different MPG. also not from personal exp but one of my mechs. advised me against bosch stick to NGk or just go for ZEX. Dohc let me know if i got anything wrong.

also anyone running short ram will get better fuel economy at higher rpms/speeds and does anyone know how many screws does the throttlebody use on a 6g72?