gas mileage worse after chrome intakes., i thought it was supposed to get better? Options

[Tech9ine]

hey,
I installed this chrome intakes ram air on my ST a few months ago and since I've installed it I've gotten about 100km/tank less than i used to with my stock intake. Was I wrong in thinking the gas mileage would get better if not stay the same? could i have possibly done something wrong? (it's pretty simple, i don't think i goofed on anything.)

[j0e_p3t]

has your driving become more aggressive?

[Negative]

It's the way you drive. Everyone says this at first. After a while you may go back to your old driving habits and you will prob have roughly the same MPG.

[playr158]

its easy

Short ram intake = hot air...hot air = worse performance worse gas milage

unless you get a cold air you are just makeing reverse progress

[Rayme]

its easy

Short ram intake = hot air...hot air = worse performance worse gas milage

unless you get a cold air you are just makeing reverse progress

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

[playr158]

really? when its cold i get like 25% more power

because COLD air = DENSER air = MORE power, CLEANER fuller burn of fuel

hot air = less efficient, thinner air, LESS power

[95CelicaST]

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

How do you figure? It has been proven by many companies (including K&N) and I will even say that my CAI has improved gas mileage. It allows cooler, denser air into the combustion chamber. It is more efficient than short ram, because short ram sucks in the hot air right underneath the hood, which is less dense, yielding little to no gain over factory air box.

[BigAl_UK]

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

How do you figure? It has been proven by many companies (including K&N) and I will even say that my CAI has improved gas mileage. It allows cooler, denser air into the combustion chamber. It is more efficient than short ram, because short ram sucks in the hot air right underneath the hood, which is less dense, yielding little to no gain over factory air box.

Perhaps it then uses more gas as it can burn more of it with the colder denser air to make more power though? Dunno, just guessing.

[95CelicaST]

Perhaps it then uses more gas as it can burn more of it with the colder denser air to make more power though? Dunno, just guessing.

it only burns as much as you allow, be it by your foot or bigger injectors.

[BigAl_UK]

Perhaps it then uses more gas as it can burn more of it with the colder denser air to make more power though? Dunno, just guessing.

it only burns as much as you allow, be it by your foot or bigger injectors.

But the ecu does adjust the fueling based on not only the position of your foot but also the amount of oxygen available guaged by the temperature of the incoming air, the intake manifold pressure and the amount of O2 left after the burn determined by the lambda sensor - surely this means more air = more fuel burnt? There's something in my description about closed and open loop missing but I don't remember all that

[DeW_H0e_GT]

besides from the cold air issue...did u install your air intake inlet temperture sensor all teh way in?....

[Hanyo]

Cold air = more power. More power = less revs needed to get the car moving.

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

My mpg decreases in the winter also. I warm up the car longer, and use more accerioes such as heater, windsheild wiper and rear defroster. All this electricity use puts a heavy strain on the alternator and this reduces power and fuel effiency.

[azian_advanced]

but are you getting more power in return?

anyway, here's my guess:

short ram (as mentioned above) = warmer air coming in
possible solution: switch to cold-air intake

next, chrome intake piping = greater heat transfer.
possible solution: go back to the stock piping

and finally, reset the ECU and see if you get any results.

How-to reset your ECU

This post has been edited by azian_advanced: Feb 26, 2007 - 3:27 PM

[Rayme]

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

How do you figure? It has been proven by many companies (including K&N) and I will even say that my CAI has improved gas mileage. It allows cooler, denser air into the combustion chamber. It is more efficient than short ram, because short ram sucks in the hot air right underneath the hood, which is less dense, yielding little to no gain over factory air box.

Because its just a fact, I get 500KM in summer and barely hit 400 in winter with a full tank of gas. Same road to work every week.

And guess what? Your factory toyota intake is a "cold air ram intake", the only gain you get from those aftermarket intakes is the restriction you remove from the stock system, it has nothing to do with cold or hot air. Marketing baby!

[playr158]

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

How do you figure? It has been proven by many companies (including K&N) and I will even say that my CAI has improved gas mileage. It allows cooler, denser air into the combustion chamber. It is more efficient than short ram, because short ram sucks in the hot air right underneath the hood, which is less dense, yielding little to no gain over factory air box.

Because its just a fact, I get 500KM in summer and barely hit 400 in winter with a full tank of gas. Same road to work every week.

And guess what? Your factory toyota intake is a "cold air ram intake", the only gain you get from those aftermarket intakes is the restriction you remove from the stock system, it has nothing to do with cold or hot air. Marketing baby!

you're retarded if you think air temp has nothing to do with this......maybe cars work different in canada.....cause i'm sure my boosted car would love some 90* hot air for high boost levels!!!!!

This post has been edited by playr158: Feb 26, 2007 - 3:59 PM

[Rayme]

if your logic was good, every car would get extremely good mileage in winter. But its quite the very opposite, it drops buy almost 25% +

How do you figure? It has been proven by many companies (including K&N) and I will even say that my CAI has improved gas mileage. It allows cooler, denser air into the combustion chamber. It is more efficient than short ram, because short ram sucks in the hot air right underneath the hood, which is less dense, yielding little to no gain over factory air box.

Because its just a fact, I get 500KM in summer and barely hit 400 in winter with a full tank of gas. Same road to work every week.

And guess what? Your factory toyota intake is a "cold air ram intake", the only gain you get from those aftermarket intakes is the restriction you remove from the stock system, it has nothing to do with cold or hot air. Marketing baby!

you're retarded if you think air temp has nothing to do with this......maybe cars work different in canada.....cause i'm sure my boosted car would love some 90* hot air for high boost levels!!!!!

I never spoke of power in relation air temperature, I spoke of gas mileage and air temperature ! Everybody involed in cars at a certain level knows cold air is better than hot air for power. My car sure feels gutsy when its -23 outside!

This post has been edited by Rayme: Feb 26, 2007 - 4:40 PM

[Tech9ine]

well, my driving didnt change, I reset my ECU and that seems to have solved my problem, i hit 480km on my last tank. hopefully i'll do better this tank.

This post has been edited by Tech9ine: Feb 27, 2007 - 10:47 PM

[QuintinGT]

warm air = better gas milage. but less power
cold air = more power but less gas milage

warm air gets better gas milage because it combusts easier wait before you jump all over me I said easier not better.

this also might explain some things i found it in another thread.

"MPG gain is 1 while percent increase is 5%.

6. Use Warm Air Intake: Modify intake to draw warm air near radiator rather than taking cold air from under the fender. This is an important change.

Advantage: Deliver warm and smooth air to the intake for best MPG. The smoother the intake flow, the better for mileage. The less turbulence, the better."

http://www.6gc.net/forums/index.php?showtopic=40453

http://www.lubedev.com/smartgas/ultra5.htm

[j0e_p3t]

i noticed that i got better gas mileage with my cai. one reason being that i travel at somewhat lower rpms on the freeway due to the slight (very slight) hp boost.

[mycelicagt]

guess what, it takes gas to gain performance, meaning that colder the air the more gas intake, warmer the air less gas intake, its all mainly about getting the motor to operating temperature, start you car is 5 degree weather and its gonna rev up higher than lets say 90 degree weather at idle

This post has been edited by mycelicagt: Feb 28, 2007 - 2:45 AM