Fuel economy in a 1FZE

Dolph · **Posted:** Sun Jul 10, 2011 8:39 pm

See my fuel figures in my sig!!!!!

Clint79 · **Posted:** Mon Jul 11, 2011 6:04 pm

alanlow wrote:

Clint79 wrote:

With old school gas system I was getting around 480km Per tank for average 110ltrs ,
Now with turbo on the 1fz and new gas inj system I get the same kms but I'm also on 315s
To fill up cost around $62-$69 obviously depending on price and how empty the tank is .

Not bad cost for kms I think

Hi, I actually improved my consumption changing to injected gas.
If I still had 265s I'd say it would be much better but I'm not bothered
Can I ask about your turbo?
Who did it?
I did it myself after work and on a couple weekends , quite simple just need a bit of a brain, bundy,welder, plenty of Internet research,good tools, and u get a upset missus with the conversion

How much? Can't really remember but I'll give it a crack
Xr6 turbo 2nd hand $1000
Turbo manifold $800 posted
Oil and water lines $250, depends if you want rubber or braided
Intercooler $150 I think
2.5" stainless cooler pipe and bends free of mate and bought a length $60
Exhaust , stainless 3" with bends around $23O or $260
Dump pipe and flange $100-$200 custom made
Heatwrap free of dad
Highflow 3" cat carton of beer of mate
3" muffler off old maloo ute free
Rubber inetercooler bends about $200
Boost and oil pressure gauges $200
That will get you started , you can spend unlimited $$ if you wanted , my ute cuts out around 4-5 psi as I have the same elec controlsystem as the 1fz in the 100 series, you guys will 80 series are lucky and have the better air flow sensor so it runs the ecu of air flow not air pressure like mine so the 80s don't cut out when boost is in the computer just gives more fuel to suit more air,
So technically when I want to up my boost to a comfotabld 8psi I need to mod the ecu the 80s dont.
What's it like? Crazy good
Has it improved performance, towing, off road etc?
Even though I don't have much boost yet it still pulls much harder spins the 315s of road no worries , holds gears and hills much easier , I drove it all through last summer even 4x4ing in the bush on the 40deg days and the temp gauge didn't move a muscle and the car didn't miss a beat I've been up to wedge aswell and the longer trips get better fuel Eco , cruising at 100 it's sits about 1psi so if a hill comes up just put your fut down a tiny bit more and it pulls no probs
It also sounds great and is awesome fun smoking patrols and some brand new suv thing that tried to eat me from the lights to 100 kmph on the frez and failed and this is only low boost.
Of road is still fine idling through boggy sand tracks and crawling up hill and snot

Cheers.

MichaelW · **Posted:** Mon Apr 09, 2012 4:28 pm

Just finished a 3000klm round trip from bundy, longreach, mackay and back to bundy.

At the city gates of mackay I filled up both tanks with E10. Set the trip meter and the gps. I made it home on the main tank. 605klms and I reckon there might have been 500ml left in the tank if I was lucky. Thats 15.8 ltrs per 100klms.

I wasn't towing, no passengers, no roof rack, traffic was pretty good, two stops. Tyres were at 46psi.

I reckon it would have been low 15's or high 14's with the normal 95 octane stuff.

mwitcher · **Posted:** Mon Apr 09, 2012 4:50 pm

When people quote how many km per tank, is that until the orange light comes on (79 lt uesed in mine), until the gauge reads empty, or the car runs out of fuel and engine stalls? The sub tank, when starting puts a bit of fuel into the main and there is probably a feed from aux to main, as when filling the main tank from before transferring fuel from aux, the aux still can be topped up with a few litres. There is only one way to gauge fuel consumption, fill both tanks, go for a big drive and go to the same pump and refill to the same level. My standard petrol (1FZ-FE) will get 16 - 17 l/100k on country running, 20 or a bit over in city (depending on traffic) and 24+l/100 towing a full furniture trailer of caravan). I guess the guys with a carby model can fine tune the idle and running mixture, but us EFI guys are stuck with the engine computer.
Mike

TheBigBoy · **Posted:** Mon Apr 09, 2012 5:39 pm

You can fine tune alot more with the computer than a carbie.

jiggas · **Posted:** Mon Apr 09, 2012 6:32 pm

How so? Best that I know unless you get a piggy back ecu you are stuck with being able to adjust the timing a few degrees. other than that the parameters are set

TheBigBoy · **Posted:** Mon Apr 09, 2012 6:36 pm

Oh sorry. I should have put A computer. As in aftermarket. Any programable computer can fine tune any mix anywhere in the rev range. Lean it out at 100kph with a mafless tune for your truck and your laughing. Thats why the LS engines get such good eco for power.

Surely by now though, You would think someone has unlocked and has a program for a 1fz.

alanlow · **Posted:** Mon Apr 09, 2012 7:25 pm

TheBigBoy wrote:

Oh sorry. I should have put A computer. As in aftermarket. Any programable computer can fine tune any mix anywhere in the rev range. Lean it out at 100kph with a mafless tune for your truck and your laughing. Thats why the LS engines get such good eco for power.

Surely by now though, You would think someone has unlocked and has a program for a 1fz.

Not as easy as it sounds. These 1FZ-FE ECU's are very good at learning around tweaks. While you think you have changed some parameters give it a little while to "learn around" the mods and you will be back where you started.

On the fuel consumption thread, last weekend I drove from Perth to Augusta and back, 4 adults, back crammed to the ceiling and full length roof-rack piled high and a head wind, 100-110kph most of the way, LPG ran out at 517k. Around town I always get between 460-490 k to a 100 litre tank. Gas is very easy to calculate as the AFL will only let you put so much in and the gas ECU automatically switches to petrol when it detects the gas is out.

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