Edit fuel consumption.

[wablacksv8]

Over the last 12 months I have kept records of fuel usage and km travelled, the last 6 months were with the car having a MAF tune(also has full exhaust and CAI). My driving habits haven't really changed, if anything a little more WOT since the tune due to the little extra go. I use the car for work on a day to day basis around Perth and it's suburbs with a boot full of tools and spares for my job. I do a lot of stop start driving and as well there are several months of the year that require aircon to be used.

Here are the results:

Pre tune 14.7lt/100km

Post tune 13.6lt/100km

Based on a litre on fuel average cost of $1.20/litre and 20,000km a year that is a saving of $240 per year(I travel 30,000km per year at a saving of $360).
You can see the cost of your edit pays for itself over time not to mention the better drivability of your car.

[LS1Grange]

I'll use this thread when justifying expenditure on ones vehicle to the missus. :yahoo:

[chillicatqld]

My edit made sweet FA difference to fuel... must be lots of open roads and not many traffic lights in Perth?

[KounTs_UtM]

pffffftttttttt..... we got lights, lights a plenty!

[NZSHAKER]

At this point and time of having my Edit done around 1 1/2mths ago, i find my fuel costs have not decreased this is due to me playing with the car alot in first gear, but I believe that when this is out of the system they do say it is a great way to increase mileage.

Hope so in 2 weeks getting 3.9's put in my car


Where will it end.....................................

[XLR8 V8]

My edit made sweet FA difference to fuel... must be lots of open roads and not many traffic lights in Perth?

Mine went from averaging 16-17L/100km down to 12-13L/100km, and that's driving in and around Brisbane - then again my stock tune seemed to be very very rich based on power/afr's. Out on the highway I regularly see fuel consumption into the 9's

[OLS108]

mine went from 14.2 to around 13.2

then i got the stally and it went from 13.2 to around 16.0 around town

PS i do have a heavy foot... and Body:p

[bundyvx]

where is the thanks button when you want it ?

Good thread wablacksv8,

It's good to hear stories like this, my missus is a full on sceptic when it comes to modifying my car and when i try and tell her it's going to be better on fuel she walks off in a huff.

I need all the ammo i can get !

So thanx

[wablacksv8]

If anyone's been to Perth then you'll know that there is very little traffic management so no timing of lights and extremely long waits when lights are red.Also the weather is pretty hot here for half the year so I would imagine this is going to be a factor rather than the cooler weather of the south eastern states.
Ok the traffic is not the same as Sydney or Melb so fuel usage would be lower here in Perth but I was only trying to show the difference before and after a edit so people may be able to justify a tune to their "minister of finance". Also most of the posts on fuel usage are from the readings off the instrument cluster, whereas these figures are from long term data.

As I have a novated leased vehicle it helps me budget for fuel/costs.

[michaels1v8]

My edit made sweet FA difference to fuel... must be lots of open roads and not many traffic lights in Perth?


Do you also have a full exhaust and a CAI?

I would say the exhaust makes a bit of a difference too...


Thanks for that info WABLACKSV8 very helpful.:thumbsup: Puts things into perspective and shows LS1's arent always the thirsty monsters made out to be

[wablacksv8]

Do you also have a full exhaust and a CAI?

I would say the exhaust makes a bit of a difference too...


Thanks for that info WABLACKSV8 very helpful.:thumbsup: Puts things into perspective and shows LS1's arent always the thirsty monsters made out to be

Yes I have 4>1s, high flow cats, 2x2.5 exhaust and a Pod filter enclosed.
Only had exhaust for 3 of the 6 months I have had the edit and fuel usage didn't really change.Had tune touch up for zorst at time it was fitted.

[chillicatqld]

Do you also have a full exhaust and a CAI?

I would say the exhaust makes a bit of a difference too...


Thanks for that info WABLACKSV8 very helpful.:thumbsup: Puts things into perspective and shows LS1's arent always the thirsty monsters made out to be

Yep - full mandrel bent 2.5 exhaust - ceramic coated tri-Y's - high flow CATs. Mafless tune. Enclosed pod filter - 3.9 diff gears (only just put in - have slightly lowered fuel consumption) - Maf pipe....:driving:

[michaels1v8]

Yep - full mandrel bent 2.5 exhaust - ceramic coated tri-Y's - high flow CATs. Mafless tune. Enclosed pod filter - 3.9 diff gears (only just put in - have slightly lowered fuel consumption) - Maf pipe....:driving:

Nice. Im stumped though why you didnt notice a decline in fuel consumption. Must drive in some heavy traffic then :thumbsup: or like to enjoy your driving haha:driving:

Oh well you dont buy an 8 to save on fuel though do we.

[chillicatqld]

Nice. Im stumped though why you didnt notice a decline in fuel consumption. Must drive in some heavy traffic then :thumbsup: or like to enjoy your driving haha:driving:

Oh well you dont buy an 8 to save on fuel though do we.



Me too Michael.... I am wondering now though because it burbles a fair bit and pops now and then on backoff whether I am dumping too much unburnt fuel out the exhausts?
Anyone in the know tell me if this could cause excess fuel consumption...?:thumbsup:

[BLACKWAGON]

Me too Michael.... I am wondering now though because it burbles a fair bit and pops now and then on backoff whether I am dumping too much unburnt fuel out the exhausts?
Anyone in the know tell me if this could cause excess fuel consumption...?:thumbsup:

Dont quote me on this but from memory someone else had an excess fuel consumption problem, was a bad tune and it was still feeding fuel on backoff, I dont think they should be using fuel if you are not touching the accelerator ie when u backoff.
Mine burbles and crackles too, thought that was normal when u have headers and exhaust.

[chillicatqld]

Not much chance of being a "bad tune" I dont think - pretty safe in the hands of PowerTorque!
But, was just a thought - oh and by the way, am pretty certain that unburnt fuel is why your car burbles on backoff... but I am always willing to be told when I am in incorrect.

[michaels1v8]

Not much chance of being a "bad tune" I dont think - pretty safe in the hands of PowerTorque!
But, was just a thought - oh and by the way, am pretty certain that unburnt fuel is why your car burbles on backoff... but I am always willing to be told when I am in incorrect.

Have read Steve aka Oztracks comments on the exhaust burble on back off and he says it is all in the tune.

http://www.ls1.com.au/forum/showthread.php?t=70057

not quite sure what that means but I am guessing like you said too much fuel on DCOP or whatever he called it...

[vyssbeast]

mine went from 14.2 to around 13.2

then i got the stally and it went from 13.2 to around 16.0 around town

PS i do have a heavy foot... and Body:p

So for someone thats already averaging 16 round town, stally would be a no no huh :(

[BLACKWAGON]

Not much chance of being a "bad tune" I dont think - pretty safe in the hands of PowerTorque!
But, was just a thought - oh and by the way, am pretty certain that unburnt fuel is why your car burbles on backoff... but I am always willing to be told when I am in incorrect.

I didnt mean that yours was a bad tune, just that I had heard of someone getting an unexperienced person to tune their car and the results of that were as I said.
Like I said dont quote me on it just something I remember hearing, personally I wouldnt have a clue.
Ill have a read of that link after work.

[benanarki]

Hi guys

First post for me. I have been reading here and around and the info are nice. I am planning to get a 2003 VY II phantom 6m SV8. The only thing making me twitch is the fuel consumption. The car will be used only for week-end escapades or short rides in the city (I am in Melb). I am looking at no more than 15-20,000kms a year but will be less I am sure.

So any justification to make me go for this black beauty and not the semi-auto Mitsubishi my wife is asking me to go for.


Thanks.

[berroca]

i Wish i could get these kind if fuel milages, my vx ss with 4into1's and 2.5" cat back, gets only around 17-18L/100, mind you it hasn't had a tune. i would be loving it if i could get 12 or 13 like some poeple here get, i baby it around most of the time to and still get 18L/100

are all these 12 and 13L/100 real???

[chillicatqld]

are all these 12 and 13L/100 real???[/QUOTE]



I wonder myself mate....

[EXCESSV]

are all these 12 and 13L/100 real???

i take all the figures on fuel consumption with a pinch of salt.
no matter what car, v6 or v8, etc...these figures aren't a real good indication as driving habits, state, types of driving, types of cars, mods, etc have a huge effect...

used to see figures which i never was able to get to all the time be it in my old VT V6 A4 where i averaged 13.5-14L/100km on a dead stock executive where others would get close to 10l/100km on apparently similar driving
or in my VXII R8 M6 i was generally getting 19-20l/100km dead stock everyday driving and others quoting figures round 15-16l/100km....

now i just look at it from the point of view that i own a v8 coz i have a passion for them and not coz i am worried bout fuel...
i do the mods coz i want to and not coz i am aiming to reach a 11sec car that has the fuel economy of a corolla....

[bermudablue]

I dont give a rats arse about my fuel consumption unless there's an obvious problem.

[berroca]

yea i don't care about the fuel consumption beacause the amount that i drive it it doesnt matter anyways, but am always supprised when people are getting the kinda mileage i used to get in my astra

[madazz]

cant wait to get my edit done more power and less fuel cant argue with that...

[vyssbeast]

So for someone thats already averaging 16 round town, stally would be a no no huh :(

Sorry to quote myslef, but for someone already averaging 16's, how much worse would a stally make the situation ... say a 3000-3200 stally

[Oztrack Tuning]

Its likely rich on decel, the other cause of popping is the timing dropping for decel before the fuel being cut or the opposite back on the throttle with fuel but timing is still close to zero advance.

LSX's can go well and not waste fuel when tuned comprehensively, not just at WOT.
That means parts throttle tuning has had time spent on it also - after all we spend most of out time at part throttle. People used to just rely on long term fuel trims to look after fuelling - but really every car thats mafless should be tuned in open loop (no o2 sensor guidance so there is no fuel trimming)first to get the main VE table right. Doing this is the main area where peoples fuel economy is improved along with part throttle torque work.

These cars are far too quick to be at WOT all the time. ;) So we may as well not waste fuel when coasting or cruising.

[highlander_69r]

b4 edit mid 14s
after edit/with zorst mid 12s low 13s
cam / mid 14s low 15s
(soon to be 232/234 cam and highstal) be lucky to see under 18s i guess :)

[brh26]

fuel consumption history for highway driving is as follows;
stock - 11.7
3.91/full zorst/maf tune - 11.3
3.91/full zorst/mafless - 11.3
3.91/full zorst/mafless/2500 stall - 11.6
3.91/full zorst/mafless/2500 stall/cam - varies 12.5 initially to 11.6 last weekend

[BLQWN]

VY SS ute before 15-16
After tri-y's, hiflows,mafless,otrcai 13-13.5, (Chipmaster)
Long runs- high 12's
A most definate improvement, but I only care when on a long run anyway.
Note- I always have a/c ON.

[jaykay]

Note- I always have a/c ON.
That's because you are too fat.... :teach: :hide:













I can talk.... :werd:

[VYR8HSV]

I am always getting between 11 - 13 lt/100k
And get 450 - 500 ks out of a tank.
Mines a VZ SV8 A4 with only a 3 1/2 catback.

I dont think i drive it that easily...

Pete

[BLQWN]

VY SS ute before 15-16
After tri-y's, hiflows,mafless,otrcai 13-13.5, (Chipmaster)
Long runs- high 12's
A most definate improvement, but I only care when on a long run anyway.
Note- I always have a/c ON.

And on the 80km run back from the 30k service just got into the mid 11's.