Fuel Economy

[James Mramor]

Hey what is the average RB25DET getting for fuel economy?

I have a RB20DET and i am concidering the engin swap to the RB25.

I don't want to kill myself with fuel tho.. on average i will drive 1000km/week

in my RB20det it will cost me about $110-$130 Canadian per week. depending on my foot and how much i boost it!

I think that i am at about 13L/100kms or about 23MPG

Edited February 24, 2006 by James Mramor

[Cubes]

After a tune I noticed no difference in fuel economy going from my rb20det to the rb30det.

Depending on how the car is driven I can get as low as 10.6L/100km's, ~470km's from full until the red light for local 50-60km/h driving. I don't drive in peak hour so no doubt fuel usage will rise if I were to.

Prior with dirty injectors, old o2 sensor and no tune (pfc base map) I was getting as low as 14L/100km's. At first with the dirty injectors I replaced the o2 sensor.. Did nothing, replaced injectors perfect.

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[stuartlaw_78]

Hi mate...

I've just rebuilt my RB25DET with some forgies, etc.. basically strengthened the motor for max boost... I high flowed the turbo but everything else (Ecu) is standard. Depending on how I drive.. I will get anywhere from 380 - 430 km out of a full tank.... It runs fine but I reckon if I got it tuned, I'd prob get about 450kms out of a full tank..

[elbee111]

Obviously depends on your driving habits, ie Amount of boost, highway vs city etc etc.

Am getting 12l / 100 km mildly modded, but this is with mostly highway and provincial town type driving.

El Bee

[Cubes]

Hi mate...

I've just rebuilt my RB25DET with some forgies, etc.. basically strengthened the motor for max boost... I high flowed the turbo but everything else (Ecu) is standard. Depending on how I drive.. I will get anywhere from 380 - 430 km out of a full tank.... It runs fine but I reckon if I got it tuned, I'd prob get about 450kms out of a full tank..

I was getting the same as u with the new injectors, new o2 sensor but untuned pfc with the rb30det.

Displacement doesn't appear to make a big difference from 2-2.5-3ltrs..

[paulsid]

hmmmm R34 4 door, I get just on 300k's if I'm lucky on a full tank.. ;-( Not happy. average driving 2. If I drive hard well who knows might need a trailer for more petrol!

[Craved]

i used to get 450-500kms out of the std rb25...

who knows now after the 3040 install lol havent taken notice

[Spook's_Skyline]

new injectors eh?

i wonder if i could clean my old injectors . . . ...

im getting 300ks a tank out of my 200rwkw rb25det

driving style doesnt seem to affect it

i would like to get more

i think i should be

(should have mentioned, i just replaced my o2 sensor the other day, made no difference)

Edited March 4, 2006 by Spook's_Skyline

[SLIPPERY]

a little while ago i cleaned my AFM and fuel consumption is now great!

i can get 600+ km to a tank running 10 psi.

10L/100 kms is quite a good stretch of the fuel

before i cleaned the AFM i was struggling to get 500km / tank

[Spook's_Skyline]

how could i tell if my afm is dirty?

i have a pwc hc, would it show up on the voltage from the afm?

[paulsid]

So I have heard oxyegn sensor, AFM. Sorry but can someone let me know what AFM is?

Might be a good idea to take it to a specialist workshop? anyone know of a good, trustworthy workshop that deals with skylines?

Cheers..

[shif_tea]

air flow meter. Its on the air intake, tubular thing just connected to the airbox or pod filter depending on what u have. Will have wiring and a connector on it.

You can spray out the inside with circuit board cleaner or something, but be careful with it cause u can damage it and you'll then have to buy a new one.