bradc
1 AYC Bar
take it out on the open road and you'll see it drop quite a bit below 10l/100km
Fuel Consumption Figures - how to empty your 60L tank in style
- Thread starter Peter_D
- Start date
fuel usage
Hey Brad,
I'm a newbie to this site, but have had turbo cars for 8 years now all Nissan, just thought i'd add my 2 cents regarding fuel mixtures.
I'm not a mechanic, but have a little knowledge with this tuning my cars over the years.
NOTE: this is a general guide, not intended to be taken as gospel, here we go;
When manfacturers tune their turbo cars, they do it to account for the worst possible temparature, driving conditions and guys/gals that absolutely flog the crap out of the engines. The engines have to last many years putting up with ridiculous amounts of abuse. If anyone has ever seem or read about what for e.g Holden do to their engines before they let them loose on the public, you will know what i am talking about here......How do they do this? Easy, extra fuel is added as a safety measure to help cool the cylinder head temps CHT's and avoid detonation. Timing is also not as agressive as it could be, ie there is a decent safety margin in the fuel and ignition maps.
**What follows below has the caveat that the timing map is pretty close to spot on, as no amount of fuel will stop a car detonating with too much timing!
Most naturally aspirated cars don't run any richer than 13.0 at full load, so really neither should your Leggy when not on boost or even as it approached the cross over point between full vacuum and boost.
Turbo cars running less than ~16 psi shouldn't need any richer than 12.0-12.2 at full load, otherwise you're just throwing fuel out the back for no gain.
16-25ish should see no more than 11.7 depending on cams
>25 will see it dip down to 11 and less.
Now before you guys go balistic, re-read my caveat** i am trying to add to the forum not be a _ick.
That said, the Legnum ECU is sealed and unless you add a piggy back computer or drop in an after market item, your ability to control fuel and ignition is very limited. I'd be interested to see how the SAFC's go?
If your fuel ecomony is crap, seems the only thing you/we can do is make sure the injectors are working properly, the O2 sensor is in good order and you add the best fuel you can get. Once that is complete disconnect your battery and see what you get! Otherwise accept it and enjoy the car
Now...be nice this is only my 3 or 4th post
At the end of the day, when tuning the car, it'll tell you what fuel it needs you just need to watch the CHT's
Hey Brad,
I'm a newbie to this site, but have had turbo cars for 8 years now all Nissan, just thought i'd add my 2 cents regarding fuel mixtures.
I'm not a mechanic, but have a little knowledge with this tuning my cars over the years.
NOTE: this is a general guide, not intended to be taken as gospel, here we go;
When manfacturers tune their turbo cars, they do it to account for the worst possible temparature, driving conditions and guys/gals that absolutely flog the crap out of the engines. The engines have to last many years putting up with ridiculous amounts of abuse. If anyone has ever seem or read about what for e.g Holden do to their engines before they let them loose on the public, you will know what i am talking about here......How do they do this? Easy, extra fuel is added as a safety measure to help cool the cylinder head temps CHT's and avoid detonation. Timing is also not as agressive as it could be, ie there is a decent safety margin in the fuel and ignition maps.
**What follows below has the caveat that the timing map is pretty close to spot on, as no amount of fuel will stop a car detonating with too much timing!
Most naturally aspirated cars don't run any richer than 13.0 at full load, so really neither should your Leggy when not on boost or even as it approached the cross over point between full vacuum and boost.
Turbo cars running less than ~16 psi shouldn't need any richer than 12.0-12.2 at full load, otherwise you're just throwing fuel out the back for no gain.
16-25ish should see no more than 11.7 depending on cams
>25 will see it dip down to 11 and less.
Now before you guys go balistic, re-read my caveat** i am trying to add to the forum not be a _ick.
That said, the Legnum ECU is sealed and unless you add a piggy back computer or drop in an after market item, your ability to control fuel and ignition is very limited. I'd be interested to see how the SAFC's go?
If your fuel ecomony is crap, seems the only thing you/we can do is make sure the injectors are working properly, the O2 sensor is in good order and you add the best fuel you can get. Once that is complete disconnect your battery and see what you get! Otherwise accept it and enjoy the car
Now...be nice this is only my 3 or 4th post
At the end of the day, when tuning the car, it'll tell you what fuel it needs you just need to watch the CHT's
bradc
1 AYC Bar
Yep, thats about right!
The stock tune is down to about 10-10.5 in most cars, large gains can be made by running them at about 12:1 or so.
The stock tune is down to about 10-10.5 in most cars, large gains can be made by running them at about 12:1 or so.
naughtika
OzVR4 Stalker
did 450kms on my last full tank... 3/4 of it was with the AC on.. I guess mine's doing better
G
Guest
Unregistered
I've just used a tank with LUCAS injector cleaner and fuel light started flicking at 350KM to 370KM which I then filled up.
13L per 100km city driving with some hard drving on most trips.
So far 10.7L/100km is my best (HWY)
13L/100km is the most its used.
It did take me a couple of weeks to go through the last tank though as its not a daily driver at the moment.
13L per 100km city driving with some hard drving on most trips.
So far 10.7L/100km is my best (HWY)
13L/100km is the most its used.
It did take me a couple of weeks to go through the last tank though as its not a daily driver at the moment.
naughtika
OzVR4 Stalker
mine's currently done 300km and it hasn't even gone past the half tank..
Im a noob with measuring it with xx/100kms..
Im a noob with measuring it with xx/100kms..
G
Guest
Unregistered
Wow thats great so you have lots more power and are using less fuel from your mods. Good work!
An example for working it out.
370km and filled up with 48.43L
370 divided by 100 =3.7
48.43 divided by 3.7 = 13
13L per 100KM's
An example for working it out.
370km and filled up with 48.43L
370 divided by 100 =3.7
48.43 divided by 3.7 = 13
13L per 100KM's
370 / 48.43 = 7.65km/L or in old speak 21.5 mpg
Now that's pretty bad. This is V8 fuel consumption territory!
My wifes Vectra that we are about to trade in on the Legnum gets anywhere from 12 to 16 km/L. That's a 2 litre 4 cylinder.
I"ll be disspappointed if my Legnum gets worse than 10km/L
G
Guest
Unregistered
Your comparing a naturally aspirated 100KW 2 litre 4 pot Front Wheel Drive to a twin turbo 2.5 V6 206KW 4WD. Dude, prepare to be dissappointed with the fuel economy but NOT with the driving experience.
bradc
1 AYC Bar
most of the time in normal driving you should be able to get between 9 and 11l/100km
Dude, ive had turbo cars for 8 years now, i know what fuel consumption they can achieve. My Sil80 used to get 12.5km/litre or 8km per 100 and that was running the 2.o litre 6
Kristians' is a fine example of what can be achieved AND he hasn't tuned his SAFC yet, it should be better again!
Did my first long run in the car sunday 400km's and took 41ltrs so pretty much on the 10l a 100, car has only done 700km's in australia so far and has been settling in, still smells rather rich when idling so need to see if i can have that fixed and might get better, aslo we have noticed before that the trip to orange always uses more fuel then the way home
so thats been gentle acceleration but in general was doing 120km/hr the whole way so it wasnt going that slow and it still did the 10l/100 so i am happy with that
my car is a 97 Manual prefacelift
so thats been gentle acceleration but in general was doing 120km/hr the whole way so it wasnt going that slow and it still did the 10l/100 so i am happy with that
my car is a 97 Manual prefacelift
G
Guest
Unregistered
So if you set it up with an safc or e-manage there shouldnt be any problem to have the car in the 0.8l/100 area?
When you drive calm
When you drive calm
SiliconAngel
1 AYC Bar
I think you mean 8L/100km
There are never guarantees, but of course improving your efficiency with upgraded fuel delivery components will result in lower fuel consumption for a given distance with similar driving conditions, yes.
There are never guarantees, but of course improving your efficiency with upgraded fuel delivery components will result in lower fuel consumption for a given distance with similar driving conditions, yes.
Only a scooter would come close to 0.8L/100kms I would think
