fuel usage for a stock rb25det

[paveway]

hey dudes, i know this has probably been covered before, but i am doing a report for tafe, comparing rb25det in a r33 skyline and the holden 5 litre v8 in a rv calais, now what i need to know is the stock fuel usage of rb25det

thanks :chairshot

[krzysiu]

isnt it around 12L/100Km stock?

[Dee 33]

400-450km every time on a full tank depending on driving, and that's not running it to completely empty cause you'd have to be a moron to do that

[Tommyk]

Ummm Yeh about 450 kms to a tank.

Actually quite similar to what i get in the gtr.

[JCMarshall_Law]

this has been covered 1000's of times but since we are here here is the fuel usage from my last couple of tanks:

465km from 56.88L --> 12.16 L/100km

423km from 52.97L --> 12.52 L/100km

I have had as high as 17 L/100km for a track day and lowest was around 11.5 L/100km when they were all highway kms. Average is around 12.6 L/100km.

On Optimax, 1995 R33 GTST with turbo back exhaust and pod filter thats it. To measure the fuel consumption I set the odometer to zero when I fill the tank then measure how much fuel it takes when I next fill up.

[Ruffels]

jesus i want that fuel economy.. i get 300km to the tank driving normal with a bit of boost

pod filter and 10psi

new o2 sensor for me

-Ruffels

[paveway]

sorry for bringing back this old thread, but when you guys just say a distance, how big is the tank in a r33 gts-t ?

[**JaR**]

not very..... thats all i know lol , yeah 400-450kms from full tank is what i usually got, sounds right. 300kms??? dude u needa tune ur car, either that or u drive 160km/h everywhere.

[RyanN]

all i know is that i get 240km on a full tank of premium from my er34 auto, how do people get 400-450 on a tank? better/regular tuning? regular maintance? driving like your driving miss daisy?

[gt-t_r34]

im pretty sure the tanks are 60 litres

[Tommyk]

65 litre tanks, but when I fill up its usually around the 55 L mark

[rukus]

all i know is that i get 240km on a full tank of premium from my er34 auto, how do people get 400-450 on a tank? better/regular tuning? regular maintance? driving like your driving miss daisy?

holy shit

do u thrash the car at every traffic light?

[Dale FZ1]

Quoting a useable fuel range doesn't give a measure of consumption or economy (depends how you calculate fuel use). JCMarshall_Law has the only reliable method for establishing fuel consumption, and it is the one I follow also.

General use I experience is 8.4-9.0 km/l, with a best of 9.4km/l, and worst 5.5km/l. Stock boost, FMIC, full 3" exhaust with split dump.

I don't drive like Miss Daisy, but do try to maximise the number of km between fills I enjoy behind the wheel.

cheers

[RyanN]

holy shit

do u thrash the car at every traffic light?

nope im extremely sensible in my skyline :innocent: , really. i drive noramally since the fuel economy is so bad, also after the FMIC mod i did, the fuel usage has increased slightly. Im going to have to take it to get i tuned and checked out, seems to have quite a loud rattling sound coming from the right cam cover....... :werd:

I've check the spark plugs there fine however like most r34 my coil packs are on the way out so maybe a new set might fix the problem. The exhaust gas smells extremely rich, can nissan dealerships be trusted for a tune with the rb25det motor?

[igor]

I get about 300-360 km per tank. So far I have replaced the O2 sensor, cleaned the injectors, put a pod filter, adjusted teh timing, regapped the spark plugs to .95. After regapping the plugs the economy is worse. I m thinking i should put it back to .8. If that does not work, i m out of ideas for the economy.

Actually I have a bleed valve sitting at about 9 psi. I know that 25DET goes into rich and retarded mode. But does it do that when you are off high boost as well, ie does it run rich ALL the time after sensing high boost?

[Dee 33]

Guys your cars all sound f**ked.

Stock my car was getting 400-450km.

With mods (240rwkw, 16psi) I get just under 400km before I refill. My last tank (freak tank) got me 460km!

Generally if I give it a lot of thrash I'll get just over 350km. Anything under 300 with normal driving and I'd be sure somethings wrong.

[rukus]

i get around 400 per tank. on long highway type drives i get 500+

i have an rb25det in an r32 gtst

[heartbrkr]

i get like 250km per 40liters.

thought it was a fact of life for skyline owners.

[ramjet]

ive got a r32 with a rb25det also .. running 9 psi making 260 rwhp and using safc 2 to manage my fuel and air. It been tuned and im getting around 250k's on city driving.. i am suspicion of my diff gearing though.. it feels very low... but surely it couldnt be causing such a big difference in economy.

[disturb3d]

Mate,

I feel your pain, I got an er34 gtt too, but manual. If im lucky i go through around 300+ on a full tank.... Im not sure if this is a common problem with the 34's.

all i know is that i get 240km on a full tank of premium from my er34 auto, how do people get 400-450 on a tank? better/regular tuning? regular maintance? driving like your driving miss daisy?