Long Range tank in 100 series

Longreach,
One annoying thing about my ARB 170 is that the fuel guage no longer reads anywhere near what it should be . I suppose they are all the same with the different shape , but it really bugs me .
They don't mention that when you are buying it .
Willie .

Hi Willie,
I know what you mean. When I changed my sub tank to the Longranger I found the gauge didn't correctly reflect half, quarter etc. which might be expected because the gauge wasn't designed for that tank shape. For obvious reasons I wanted a good way to be able to work out how many litres I have on board at any time. I 'calibrated' (if that’s the word) the tank so that I could use the gauge to get a better indication. I filled the sub tank completely and then when the needle was exactly on 3/4 I switched to the main tank so that I could get to the petrol station with the sub tank still exactly on 3/4. I would then refill the sub and note how much it took to fill it. I repeated this for half, quarter, 'E', and completely empty. I then repeated it for the main tank and created a table of how many litres is in each tank for each level. (Yes, this was over some months) I did the whole thing twice to check, and found very little difference. For the sub tank I got 185 litres on full, 160 at 3/4, 123 at 1/2, 76 at 1/4, and 35 for E. It doesn't really matter if it says half or quarter or what, so long as you know how many litres it means. If interested, the figures for the main tank were 93 litres in the tank for full, 71 litres at 3/4, 50 litres at 1/2, 25 litres at 1/4 and 8 at 'E'.