Outer Limits 4x4 Board

after reading the other thread about fuel economy in 4wds i was wonderig what type of economy i shoud be getting out of my zook? as the gauge only works when it wants to i dont want to get stuck somewhere.
i picked it up and put $20 in and drove it 30ks, then stuck another $20 in to make sure it doesnt run out.
the guage showed 3/4 this arvo when i was playing around with it but then it stopped again.
is 400 to a tank about normal?
its a hard top with 3.55 gears aparently, 1L case and 1.3

It'll have 3.7 or 3.9 gears in it.

If it's running well (ignition wise) 400km from a tank is reasonable. If there are ignition problems (common) you'll be using more throttle than necessary so it'll go to poo - 14l/100km.

I think that lots of people pinpoint carby trouble as the cause of every sierra malady but timing/ignition can be a big problem too.

Steve.

If i remember i used to get around 360ks from a tank , mainly due to Big rubber .

depends on how many trail mods your tank has , have a look under the rear you will see the trail mods somtimes trails go overboard and modify the tanks heaps , I had a super trail modified tank in one of mine
you could only get about 25 ltr in the thing

Larry.

yeh the tank is modded hardcore
maybe fill up every 200ks to be safe?

the largest gears they went to in a wide track was 3.7, if its a 87 88 or 89 then it will be 3.9, anyearlier then 87 and should be 4.11,
with standard tyres 205 x 75 x 15, you should be getting on average 390 to 400 with a 40 ltr tank
I was talking to a guy on another forum and he said his tank was 30 ltrs and he only got 250 max out of his tank, until he sent me a pic of his tank.
the botom of the tanks is suposed to be flat. his was bashed in and the fuel pick up had been bent,
Taking that into consideration, if your not going to have it on the road for long and you just want know an average? 380k's out of a tank on standard tyres. any larger tyres even 215 and the speedometer wont be reading right. I am runing 215x75x15 and my speedo is 10kmh out, and it thinks i am only doing on average 330km to a 40 ltr tank go figure

i think i got 215/75r15 on it at the moment.
the red one im going to build up is going to have 33s on it.
i think its got 3.9s as its a 1L originally

if its a 1.3 narrow track it still has the 4.11 diff gears, all narrow track weather it be 1ltr or 1.3 have them. I think the lj 50 (late 70's early 80"s ) had the 4.88 diff gears in them. Very hard to find but they bolt into the Narrow track (N/T) diff centers.if your car is built before 87 it will be a narrow track=4.11

in my serria ute 86 with stock gearing, 2bl, 2 springs, big alternator, stock engine, 31x 10.5 mtrs
i get around 280 - 305
I'm happy with it

better than a jeep

ofr57 wrote:
better than a jeep

at least you know it wont catch fire

I've the 30ltr tank, and I usually get 210ish outta mine.

Would be more if I pushed it, but I'm paranoid of running out of fuel.

Danzo wrote:if its a 1.3 narrow track it still has the 4.11 diff gears, all narrow track weather it be 1ltr or 1.3 have them. I think the lj 50 (late 70's early 80"s ) had the 4.88 diff gears in them. Very hard to find but they bolt into the Narrow track (N/T) diff centers.if your car is built before 87 it will be a narrow track=4.11

I don't think that's right. Here's the information I work on:

Lj50 - 4.88
LJ80 - 4.56 (?)
1.0 litre - 4.11
1.3 NT - 3.9
1.3 WT - 3.7
Coiler - 4.1
Jimny 4.09 Manual, 4.3 auto (aparrently)
Maruti - 4.11

LJ Gears Do NOT bolt into NT centres. The do bolt into 1.0 centres. I know this from experience.

Steve.

Gwagensteve wrote:

Danzo wrote:if its a 1.3 narrow track it still has the 4.11 diff gears, all narrow track weather it be 1ltr or 1.3 have them. I think the lj 50 (late 70's early 80"s ) had the 4.88 diff gears in them. Very hard to find but they bolt into the Narrow track (N/T) diff centers.if your car is built before 87 it will be a narrow track=4.11

I don't think that's right. Here's the information I work on:

Lj50 - 4.88
LJ80 - 4.56 (?)
1.0 litre - 4.11
1.3 NT - 3.9
1.3 WT - 3.7
Coiler - 4.1
Jimny 4.09 Manual, 4.3 auto (aparrently)
Maruti - 4.11

LJ Gears Do NOT bolt into NT centres. The do bolt into 1.0 centres. I know this from experience.

Steve.

the jimny auto is supposed to be 3.9, but i haven't found any yet. not that i'm looking anymore.

in europe they definetly got different ratios from auto to manual, but here here for some reason we didn't. makes no sence to me, might have something to do with emissions?

Mitch

edit; jimny rear diffs fit sierras so there is a 4.1 option for a 1.3L sierra. i know this as i have fitted these to my sierra

a zook with fuel economy 30ltrs 275/300kmh depends on how hard you drive it thats in my 85 lwb with weber and 40tho off the head with 235/75 15 at/tyres went for a drive put 10 ltrs worth in empty tank 100ks around town

Danzo wrote:the largest gears they went to in a wide track was 3.7, if its a 87 88 or 89 then it will be 3.9, anyearlier then 87 and should be 4.11,
with standard tyres 205 x 75 x 15, you should be getting on average 390 to 400 with a 40 ltr tank

I was told this buy a guy who works on sierra's every day, and a guy that used to race them.

Maybe mud4b can enlighten us!
calling mud4b......

I always worked on a 10:1 ratio, it was pretty accurate...

ie: 30L = 300km (i always filled up at 300km to be safe).

However - larger tyres not only decrease economy due to weight, but they throw out the speedo and hence the odometer - so 80km/h is actually 90km/hr, so if you travelled a true 90km, the odometer would only say you did 80km - hence when you fill up at 300km you may have done 330km in "real life".

But as i said - 10:1 is a good ratio, and fill up at 300km (ie: you're aiming to only fill up around 30L) - this ensures you have a 10L or so buffer (espeically if tank modification has been undertaken - mines missing about 4L).

Danzo wrote:if its a 1.3 narrow track it still has the 4.11 diff gears, all narrow track weather it be 1ltr or 1.3 have them. I think the lj 50 (late 70's early 80"s ) had the 4.88 diff gears in them. Very hard to find but they bolt into the Narrow track (N/T) diff centers.if your car is built before 87 it will be a narrow track=4.11

um sort of right. all NT 1.3s are 3.9s and all WT 1.3s are 3.7 ratio.

1L use a couple different ones but yeh 4.11 was the common one.

if u can find a 1L maruti with the WT housings i believe these are the 4.11 ratio and will fit a NT or WT 1.3 housing

nicbeer wrote:
1L use a couple different ones but yeh 4.11 was the common one.

What other ratios were available in the 1.0?

Steve.

Mine gets good economy in summer (~10.5 km/L), crap in winter (~9.3 km/L). Changing the thermostat would most likely fix this but I havn't had a spare day in months. Also fitting an aluminium plate over the radiator keeps her warmer and hence better economy in winter too.

Of course its worse off road, and driving around one week with two in the car instead of just me takes about .5 km/L off of the economy figures. I've never got worse than 8.5 km/L, and that was when I found a missing vacum hose, replacing that fixed a few problems.

WRT to timing, I run mine slightly more retarded than recomended, and it gives it better go and economy. I think it was around 7dBTDC???

i used to get worse economy in winter cos i was always doing skiddies in the wet =) hahaha

alien wrote:i used to get worse economy in winter cos i was always doing skiddies in the wet =) hahaha

x2

I have the 88 tin top, 87 to 89-90 were the change over years, this was done in an odd way but it works.
the first w/t did come out with the 3.9's why?
Because they didnt have the right set up yet- to cheap on there testing i think!
it was done by using the n/t housing (hense the same bolt sizes)
the housing was made wider-longer and the axels changed over for bigger ones(W/T bearings and brakes)
after they played around with the gears and got the final product (90")
they went with the larger bolts (10mm thread and 14mm head) and gears 3.7,
this is info i neede to know because i was trying to find cheap replacement front diff so i needed to know the ratio's, so when i put the new one in I wouldnt blow my trans or cv's with the difrent gears.
You only have to be on the sand and it can lock up if you have difrent size tyres or gears.
Sorry for the hijack but thought it might be of assistance!

Gwagensteve wrote:

nicbeer wrote:
1L use a couple different ones but yeh 4.11 was the common one.

What other ratios were available in the 1.0?

Steve.

meant to add on there the LJ ratios that fit the 1L housings.

Danzo wrote:I have the 88 tin top, 87 to 89-90 were the change over years, this was done in an odd way but it works.
the first w/t did come out with the 3.9's why?
Because they didnt have the right set up yet- to cheap on there testing i think!
it was done by using the n/t housing (hense the same bolt sizes)
the housing was made wider-longer and the axels changed over for bigger ones(W/T bearings and brakes)
after they played around with the gears and got the final product (90")
they went with the larger bolts (10mm thread and 14mm head) and gears 3.7,
this is info i neede to know because i was trying to find cheap replacement front diff so i needed to know the ratio's, so when i put the new one in I wouldnt blow my trans or cv's with the difrent gears.
You only have to be on the sand and it can lock up if you have difrent size tyres or gears.
Sorry for the hijack but thought it might be of assistance!

I have seen an early WT with NT centres. I think it was only the very early WTs though - 88 build. 89's are 3.7 for sure.

My guess - If it has plastic flares, it might have 3.9.s.

Steve.