What mods effect fuel consumtion??

[azzacrombe]

hey guys,

just wondering what mods actually effect your fuel consumption? at the moment im getting about 540L from a full tank. I wanna start chucking some mods on but dont want to mess up my fuel economy too much because BP Ultimate never comes cheap.

Thanks guys.

[trism]

a mod that does anything to the motor will affect it.

intakes, exhausts, ecu, cams.

[Oz_Striker]

Just control your right foot. Unfortunately as soon as you start modding your going to want to give it some stick more often to hear exhaust/intake noise

[V8KLLR]

If your after fuel economy always shift up a gear when the revs hit about 2500rpm. If I drive like that without any random rapid acceleration, I got 10km to the litre. And Ive got aot of mods.

[Lukey]

i found my fuel consmption got better when i got a catback and pod filter in my stock airbox

[curtis265]

yeh if you're able to drive similarly to how you did before modding, basic bolt ons will make it better

[Lepperfish]

I concur. Since adding an intake, headers and exhaust I get around 100km more per tank of fuel. Win.

[azzacrombe]

I concur. Since adding an intake, headers and exhaust I get around 100km more per tank of fuel. Win.

Wow that IS huge win. I would love to get another 100kms out of my tank. Looks like thats the way to go lol. What intake do ou have on your car?

[kenjz]

you would think mods that make your car go faster = burn more fuel

[curtis265]

no, an intake will either suck up cold air improving efficiency or reduce the length thus reducing friction. Headers will reduce frictional losses associated with OEM piping and a catback will reduce frictional loss and provide a more optimum pipe size for better flow at WOT. Oh and a high flow cat would be useful too

fuel efficiency will only be good if you drive carefully.

[azzacrombe]

Thanks for that curtis!! Great Info.

[Hongtegra]

hey guys,

at the moment im getting about 540L from a full tank.
Thanks guys.

I got to get me one of these magic fuel tanks! I am getting a K&N shortly to replace the fluffy OEM filter. Will see if it has any effect on mileage!:wave:

[kenjz]

no, an intake will either suck up cold air improving efficiency or reduce the length thus reducing friction. Headers will reduce frictional losses associated with OEM piping and a catback will reduce frictional loss and provide a more optimum pipe size for better flow at WOT. Oh and a high flow cat would be useful too

fuel efficiency will only be good if you drive carefully.

unless the pods sucking in hot air.
i know after i installed headers and catback + highflow my car began to run rich but that was the ecu running rich on purpose after sensing more airflow

[mocchi]

no, an intake will either suck up cold air improving efficiency or reduce the length thus reducing friction. Headers will reduce frictional losses associated with OEM piping and a catback will reduce frictional loss and provide a more optimum pipe size for better flow at WOT. Oh and a high flow cat would be useful too

fuel efficiency will only be good if you drive carefully.

i thought having intake and exhaust will improve air flow and velocity.
more air in the cylinder will result in leaner mixture (running hotter with less fuel consumption per km).
i thought frictional loss happens in drivetrain/axle/bearings.

btw, what do you mean by 'reduce the length thus reducing friction'?
are you talking about reducing turbulence of airflow in intake pipe?

srs questions, not slammin your post.

[azzacrombe]

It does make sence though, the more cold air your car sucks, the better fuel economy. Thats why you usually fill fuel either at night or early morning, because when its cooler the fuel particles are smaller and are closley packed and hence you get more fuel rather when its hotter, the fuel particles expand and hence you get less fuel.

[curtis265]

lol ok i thought u were just trolling me.

I'm talking about pipe friction, not so much mechanical friction from bearnings n shit

i ddin't know more airflow = leaner mixture??

[Lukey]

headers arent as useful without a highflow cat

[huyyy]

so a cai would improve fuel economy?

[prizedbnx]

not necessarily, the colder air is denser in comparison, so the ecu should be putting more fuel in to retain a good air fuel ratio..


But a better filter and free-flowing exhaust will improve fuel consumption

[Rayle]

It does make sence though, the more cold air your car sucks, the better fuel economy. Thats why you usually fill fuel either at night or early morning, because when its cooler the fuel particles are smaller and are closley packed and hence you get more fuel rather when its hotter, the fuel particles expand and hence you get less fuel.

I'm pretty sure that service station's tanks are underground, therefore I'm pretty sure the temperature of the petrol isn't going to change more than 5 degrees (and even is probably way too much).

The thermal expansion coefficient of petrol is 0.000950, meaning that for each degree centigrade, the petrol will increase in volume by 0.095%.

For 50L of petrol, increasing in temperature 5 degrees, it will expand by 0.475%, or 0.2375L. If you're worried about this sort of thing, I'm guessing you'll fill up when petrol is cheapest, let's call that $1.30/L.

Therefore, for filling when the underground tank is cold rather than warm, you've saved yourself a whopping $0.31!

The moral of the story is, don't go out of your way to fill up in the morning/at night. Info from wiki is here (http://en.wikipedia.org/wiki/Thermal_expansion) if anyone's interested.

[prizedbnx]

Rayle your correct about the tank location, they are about 4m underground, under ~500mm concrete also.

I would assume temperature variation would be less than that.

[r3ckless]

i can get 500 klm easily i rekcon.i i been driving it hard.

im on 330 and just under half way.

[curtis265]

not necessarily, the colder air is denser in comparison, so the ecu should be putting more fuel in to retain a good air fuel ratio..

and you won't need as much pedal input to achieve the same acceleration