hey guys just wondering how many kilometer do u get out of one tank , i have got a leyland 74 , 1100cc , i just fill the tank full yesterday , drove to the ct and back last night and to work and back todai and on the fuel meter saids i onli have a quarter of a tank .... is that right ?

thats 30 bucks off fuel in todays ?

Fuel gauges are rarely that accurate. so 1/4 tank may really be half a tank, on my car 3/4 of a tank is nearly full!!

And remember a standard mini tank is only 25litres.

I'd do a proper test.

Fill up and write down speedo reading. At next fill-up note the no. of Litres and the new speedo reading and work out how many km/L.

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68 Morris Cooper S Mk1 (*ex 78 1275 LS 4th last built, 70 Morris 1500 OHC & 70 MiniMatic)

So if that was a 500 km round trip, I'd say pretty good.

How many Kms have you travelled since filling?

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The other thing for new players is the shape of the tank. The top half holds less than the bottom half, so the needle drops quickly at first but will stay at a lower reading for longer.

On the Asparagus Job 09, I averaged 6.5 to 7 L per 100km,s , stock 1100, 12G295 head , 1 1/2SU No7 needle , good manifold , extractors, 1 3/4 exhaust , 35 ltr tank , 10inch tyres - pressure 30psi front 27psi rear , total trip 4,410km's , so thats about 530 km's a tank overall, about 8.2 tanks, so about $373 dollars of fuel ( at average price of $1.30 a litre) , is that the sort of info your after ?

( total km's includes an unauthorized visit to someones driveway/ front lawn )

.

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well its about 45 kms around trip from house to the ct , and i live around 10 ks from work .... thats not alot of k's for one tank !

mayb the gauge is not right ... because i been having problem with it since i got the car, sometimes the temperature reads very hot aswell but theres water in the radiator .

Have a look down into the filler spout with a torch, you should be able to see the actual fuel level.

There is a small voltage regulator at the back of the instruments that is supposed to supply a nice steady voltage to the fuel and temp gauges. When this starts to die than you may get strange readings.

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68 Morris Cooper S Mk1 (*ex 78 1275 LS 4th last built, 70 Morris 1500 OHC & 70 MiniMatic)

Hee hee... It was good of you to provide us a little light comic relief on the long drive home

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Simon

The adventures of an owner builder in the Tallarook Ranges

Easiest way to tell how much you used is to fill it up again. The amount you can fit in is the amount you lost from your driving, so if you can fit in 15 litres, you've used 15 litres since you last filled up (assuming you filled al the way to the top last time).

My gauge seems to be accurate, believe it or not. And the top half holding less than the bottom half makes sense - I fill up, and it usually drops to about 2/3 pretty quickly, and takes much longer to get to empty.

$30 worth of fuel will get me about 300km (although the most I've ever paid when filling up is $28). I have a leyland '78 998.

I have an 1100 out 60 thou, big cam, ported head, bigger valves, 12 inch road wheels and give it plenty and i return about 7.5 per 100km and thats spirited driving..

Gauge is pretty vague at the best of times..

fill it drive it, fill it again best way to get an idea of consumption

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Jack of all trades, master of none......

City or suburban driving is always going to give a higher fuel use. You spend more time opening and closing the throttle and keeping up with the traffic.

Highway driving with a constant throttle is a much more accurate way of measuring fuel economy.

Somebody in another thread said that their 1275 was more economical than their 1100. That was exactly my experience as well. I went from an 1100 motor to a 1275 motor and saved on fuel. Simply because the 1275 motor didn't have to work as hard to keep up with traffic.

Different story if your pushing either motor hard though. You can make both motors thirsty if your giving it heaps often.

Mike

so a 1275 will be more fuel economical than an 850?

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Here am I sitting in my tin can far above the Moon
Planet Earth is blue and there's nothing I can do...



“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson

Yep, that was me. I had a worked 1100 and swapped it for a standard 1275. Both motors went about the same, but the 1100 was doing it harder. The 1275 was significantly better on highway trips cruising at 100-110kmh in the Moke.

Tim

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1951 Morris Commercial J Type Van
1955 BSA C11G
1961 Morris Mini Traveller
1969 Triumph TR6R
1977 Leyland Moke Californian

Did they both have the same ratio diff?

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1970 Mini Deluxe - 1275, Weber, Clive 346 cam, MS 4-pot slotted discs, Megajolt ignition Now with new improved Mambas... almost on the road
1966 Van with Traveller rear seat conversion
2008 Prado GXL
All in various states of repair...

In my case it was the same gearbox. Just bolted the 1275 onto it (with the obvious minor changes of course).

The motor was balanced, is actually 1310, cammed and has head work, HIF44 and extractors. I expected it to use a lot more fuel but it didn't and it was just a far nicer car to drive than with the 1100 motor it previously had.

I must stress though that this is normal sedate driving. Drive it hard and you can make it thirsty.

Mike