Perentie 110 Auxilliary fuel tank

The typical 110 long range tank that takes the normal station wagon tank position, and has a wing section that extends up under the rear quarter panel, won't fit. As you surmised, the chassis is wider there, and thus the cut out for the chassis will be in the wrong spot. But a standard station wagon tank, at ~70l capacity, will double your range! Best check the fuel tank mounts, chances are the rear crossmember mounts won't be there, not sure about the other crossmember mounts.
The Isuzu doesn't need an in-tank fuel pump which will simplify matters a lot.

Thanks!
Doubling the range does sound promising! but I'm now thinking of keeping the spare under the rear, also the mounts aren't there but I don't think it would be overly difficult to adapt.

Barefoot Dave - I'm very interested in the ninety tank as this should be the least intrusive and 50 litres or so extra is the perfect amount especially considering the Jerry can carriers at the rear as well. Do you know if the switching systems were prone to failure? what I don't want to do is reduce the reliability if at all possible. I like the idea of symmetrical fillers. It would be great if you have the parts list for this.

Cheers,

Matt

Quote:

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Originally Posted by Barefoot Dave

G'Day Dingsy.
The RFSV used an early '80s 90 inch tank (13 gallon) as suggested, where the start battery is, under the passenger seat.
Second fuel filler that mirrors the standard and a fuel supply switching system operated from a dash switch.
If you want part numbers, let me know.

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Dave this is what im chasing to a degree..

I am planning on mounting another original 65ltr tank in place of the existing battery box under the passenger seat (relocate starting battery to where the center console should be)

How do they plumb up the auxiliary tank? I have been thinking just running a transfer pump and switching a fuel gauge to the dash. Very interested to see how the army got the job done

Not sure what is under the driver's seat in this variant, but I've got a custom 90l sill tank that runs the length of the gap between the wheels on the driver's side under my 110 county that protrudes slightly below the outer sill and almost as low as the chassis rail nearer the centre. Its made of 5mm mild steel and been to hell and back a few times without anything beyond cosmetic damage. A breather goes up behind the wheel arch under the bonnet. The standard filler has been modified to have a pair of tank inputs under the cap so this coupled with a two way electric transfer pump means I can get roughly 1000-1200 km between fills if needed.

Usi, will dig them up and PM you.
May take a couple of days.

Quote:

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Originally Posted by dingsy

Thanks!
Doubling the range does sound promising! but I'm now thinking of keeping the spare under the rear, also the mounts aren't there but I don't think it would be overly difficult to adapt.

Barefoot Dave - I'm very interested in the ninety tank as this should be the least intrusive and 50 litres or so extra is the perfect amount especially considering the Jerry can carriers at the rear as well. Do you know if the switching systems were prone to failure? what I don't want to do is reduce the reliability if at all possible. I like the idea of symmetrical fillers. It would be great if you have the parts list for this.

Cheers,

Matt

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There is another options for using the fuel.

On my 90 I have the under the seat tank. But also a second tank under the back.

The rear tank is the spare and when the main tank runs empty I have a V8 fuel pump that pumps the fuel from the back tank to the front.

Just connected to the fuel return pipe.
This means you watch the fuel gauge go up as you are driving along.


But in my 110 I have a long ranger tank which sits under the drivers seat.
This is on a switch and you can switch over between tanks and you can't tell when it switches it is very smooth.
Also changes the fuel gauge to which ever tank you are on.

I will probably go with up to a 120 lt stainless tank in the back. I plan to mount it using a heavy angle flange running along each side of the tank that sit under each chassis rail. Threaded rod will run over the top of the chassis and down each side of a chassis, then through the flange and held in place by a nut.

I also keep going back to the idea of a much smaller tank, with a square section of vertical tube in the middle for the tire winch chain. Then I could mount the tyre under the tank. A tank about 150 mm tall would carry about 70 lt.

Ok so I now have all the parts for the passenger side tank as per the RFSV bar the filler neck/pipe. Any creative ideas on what I might be able to do here?
Ultimate solution would be to fill from the drivers side fill point but I can't see how I'd make that work.

Quote:

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Originally Posted by rar110

I will probably go with up to a 120 lt stainless tank in the back. I plan to mount it using a heavy angle flange running along each side of the tank that sit under each chassis rail. Threaded rod will run over the top of the chassis and down each side of a chassis, then through the flange and held in place by a nut.

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4mm aluminium, two baffles, 97L. Baffles are directly under the straps. If you go this way:

1) Two baffles isn't quite enough.
2) 120L would easily be possible by sloping the bottom of the tank down towards the diff.
https://www.aulro.com/afvb/

https://www.aulro.com/afvb/