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My 34gtt Run 280km With A Full Tank,is That Normal?

cmmyjay
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ssshonky Grand Master

ssshonky

Posted
Posted

I am waiting to get to the end of our tank to see how the fuel consumption is going after my 1st service.

who knows a cleaner air filter and new oil and plugs etc could make a difference

I am really interested to hear of peoples opinions on wether or not the " equivalent " o2 sensors work as well as a genuine Nissan one. I dont really want to pay near on $250 for genuine

ssshonky Grand Master

ssshonky

Posted
Posted

couldnt hurt hey?

oh and something else I noticed on the weekend.. when I was leafing thru my service manual

it actually says that the o2 sensor should be serviced/changed at 40 thousand and 80 thousand k

so .. I wonder how many imports have NEVER had it changed.

being that your not going to really notice it not working other than shitty fuel economy

If people are interested, i might just ring up and find the prices for OEM O2 sensors then.
GMan Proficient

GMan

Posted
Posted

i only fill up when the fuel light turns on...which that point i think theres only 10lt left.

so for the rest of the 55lt i only get around 280km but only boot it from time to time

no major mods but runnin really rich i reckon

MAYHEM Contributor

MAYHEM

Posted
Posted

For guys who are getting over 400+ km, I presume you are babying the car most of the time? I would be lucky to break into the 300km, guess that’s the down side when you drive your car once a fortnight.

Mind you, I do remember getting over 400+KM when the R34 was stock as a rock. The pod and exhaust threw the fuel figures out the window. Would love to see what happens once the turbo, cooler, injectors and pump gets done :())

pixel8r Mentor

pixel8r

Posted
Posted
For guys who are getting over 400+ km, I presume you are babying the car most of the time? I would be lucky to break into the 300km, guess that’s the down side when you drive your car once a fortnight.

Mind you, I do remember getting over 400+KM when the R34 was stock as a rock. The pod and exhaust threw the fuel figures out the window. Would love to see what happens once the turbo, cooler, injectors and pump gets done :D))

If it was me I wouldn't just be accepting this as normal.

Get your car dyno'd and check the Air Fuel Ratio graph. It should be somewhere around 11.5:1 at the lowest point. Any lower and its likely to be running too rich, which essentially means you're throwing fuel away, with no additional benefit.

If you dont have an SAFC or similar ecu to tune AFR's, then I'd suggest this be your next mod. It should cost you $400 all up for a 2nd hand one, including installation and tuning (depending on where u go). And while you're getting it dyno tuned, check your ignition timing at the same time.

Its all about getting your engine running as efficiently as possible, yet still safely. With a good tune you should be seeing improved fuel economy and it could pay itself off in 12 months or maybe earlier, depending on how often you drive. :)

I found with my car that even just an exhaust can push your AFR's down to 10 or even lower if you raise the boost. They run rich from the factory and adding more boost will likely make it add more fuel and run even richer. Even an exhaust can raise the boost level and end up using more fuel rather than less.

You should be able to easily achieve over 350-400km to a tank provided you dont drive around with your foot to the floor and dont ONLY do short trips (ie. with the engine running cold).

So to summarise, some things to do to lower fuel consumption are:

- get a free-flowing exhaust

- install a SAFC or similar ecu to tune AFR's.

- check ignition timing on a dyno

- use boost a little less (or not :( its what you bought the car for right?).

hope this helps. :)

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