Auxillary fuel tank - usuable litres versus stated lites

Submitted: Tuesday, Sep 14, 2004 at 20:20
ThreadID: 16275 Views:2355 Replies:6 FollowUps:4
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Just fitted a Long Ranger Automotive 170l auxillary fuel tank to my 80 series Cruiser (after ditching the gas system) giving a total (stated) fuel capacity of 90+170L = 260L. However, even with the needle scraping the bottom and the red light screaming, I can only get 75L into the original main tank (around 15L unusuable). This equates to around 83% capacity. Should I expect about the same capacity from the auxillary tank (ie. 0.83 x 170 = 142L meaning about 28 litres is unusable).
I am interested in hearing from other 80 series owners as to what is the maximum fuel fill they have been able to achieve in the original tank and in the auxilliary tank (where fitted).
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Reply By: Member - Jack - Tuesday, Sep 14, 2004 at 20:55

Tuesday, Sep 14, 2004 at 20:55
Hi Cruezr:

I am interested in the replies you get, as I was going to order one for my 80 Series this week. I will hold off for the moment.

What I do know is that on my normal sized tank, the low fuel warning light comes on, and I am able to travel quite some distance without running out. As you know, it is a 90 litre tank, and I have never been able to squeeze in more than 80 litres in, despite it recording empty. May be the same thing with the larger tank.

Cheers
Jack
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AnswerID: 76379

Reply By: Wayne (NSW) - Tuesday, Sep 14, 2004 at 21:00

Tuesday, Sep 14, 2004 at 21:00
Cruezr,
With any fuel tank the gauge is only a gauge. To get a true reading you will have to run until the motor starts to spultter, fill the tank slowing the flow for the last 15lt and that should let you know how much fuel the tank holds. Two things to do when doing this test,
1 Make sure that the other tank has fuel in it.
2 As soon as the motor starts to splutter stop the motor straight away.
With the fuel pick up pipe they always have it off the bottom of the tank a little so that it has less chance of picking up rubbish.
With your aux tank, because it is pumping into the main tank, it will be easy to drain the fuel to empty and do the fill.
Because the Cruiser is running on petrol it is not a good idea to fill both tanks right to the top. As the fuel expands up the filler pipe it will transfer to the other tank, and if both tanks are full fuel can leak from the filler or flow to the carbon canster under the bonnet.

Wayne
AnswerID: 76381

Follow Up By: Truckster (Vic) - Tuesday, Sep 14, 2004 at 21:45

Tuesday, Sep 14, 2004 at 21:45
I agree with Wayne.
Fill one tank, run other one dry, and work out how much it REALLY takes from that.
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FollowupID: 336195

Follow Up By: Member - DOZER- Wednesday, Sep 15, 2004 at 17:25

Wednesday, Sep 15, 2004 at 17:25
Dont try that if it is petrol, there is a pump in there that needs cooling. not to mention the dooooobies you will suck up off the bottom.
My petrol light comes on with about 12 litres still in there, it is available to use, but toyota made it like that for a reason. The 170 in the back can supply about 150 b4 it cuts out aswell. This can be adjusted by moving floats, but this only increases the possibility of having fuel problems.
Andrew
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FollowupID: 336297

Reply By: Bob H - Tuesday, Sep 14, 2004 at 23:24

Tuesday, Sep 14, 2004 at 23:24
Hi Cruezr,

my 80 series diesel fuel tanks hold; main....87ltrs from empty

sub............48ltrs from empty

this recorded after running the respective tanks till motor starts to loose power.

hope this helps

Bob
AnswerID: 76423

Reply By: Leroy - Wednesday, Sep 15, 2004 at 08:56

Wednesday, Sep 15, 2004 at 08:56
I had a Long Range Automotive tank in my Rodeo and the low fuel light came on very early with about 25l left in the tank. I worked out how far down the fuel guage needle could go before I need to fill which usually left about 10l in the tank. But I found that as you got low on fuel, even though there was 10l-15l left in the tank the pickup in the tank didn't always stay submerged in fuel and you would do a hard left turn the the Rodeo would spatter then come good. Also I couldn't park with the nose down hill with low fuel as the pickup is at the back of the tank....and you guessed it!

Leroy
AnswerID: 76446

Reply By: Member - Glenn(VIC) - Wednesday, Sep 15, 2004 at 10:34

Wednesday, Sep 15, 2004 at 10:34
Hi Cruezr, how much did you pay for the auxillary including parts and fitting. I am about to get a Brown Davis 175l aux tank put in after removing the LPG setup, but I am going to have it set up to run totally independant of the main tank (145l Long Range Automotive tank)?

Cheers
AnswerID: 76457

Follow Up By: Cruezr - Wednesday, Sep 15, 2004 at 12:26

Wednesday, Sep 15, 2004 at 12:26
Tank cost was $836 + $280 fitting (through ARB dealer), plus $211 of fuel to test the system. The original transfer pump was operational, so I only needed a replacement fuel sender gauge (2nd hand for $10, but new about $150) and new fuel filler hoses. At the moment, I have clocked 1280kms on combined system.
Why do you need an independent system?
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FollowupID: 336266

Follow Up By: Member - Glenn(VIC) - Wednesday, Sep 15, 2004 at 16:34

Wednesday, Sep 15, 2004 at 16:34
I want it set up so that I am not transferring from one to the other. I don't have anything left of the old aux set up so it makes sense to have a totally independent setup. The prices are similar to what I have been quoted so it will all come down to labour now.

Thanks for the reply.
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FollowupID: 336294

Reply By: Coops (Pilbara) - Wednesday, Sep 15, 2004 at 18:29

Wednesday, Sep 15, 2004 at 18:29
I have a 190 Litre tank from 4WD Systems that I get 207 litres into each time it's empty (as in drained). Can usually get it down to about 2-3 litres left in it.
Main tank always takes 90 Litres when emptied so I guess I get that pretty empty too.
Have you got any dents in tanks for them to be reduced capacity?

P.S I filled my aux tank last week and squeezed 207 litres into it so these are recent figures.
AnswerID: 76510

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