Anyone done the legwork to see what aux fuel cells will fit into the various body voids under the disco II?

 

All the research I've found is that they aren't approved for us in the U.S. I've looked into the extended fuel tank replacements for the stock tank but they're not DOT approved.

 

There most certainly are approved fuel containers that you can use in the Disco. There are actually very few hoops you need to jump through in order to do this:

The regulations regarding aftermarket fuel systems that you'd have to meet are : FMVSS 301 (Federal Motor Vehicle Safety Standards), VESC-22 (Vehicle Equipment Safety Commission), NFPA 1192, ANSI 119.2, RVIA (Recreational Vehicle Industry Association) regulations, CARB (California Air Resources Board, assuming you are in Cali), and EPA (Environmental Protection Agency) regulations.

- FMVSS 301 states that anyone who alters a vehicle must meet or exceed the structural integrity and performance of the OEM (Original Equipment Manufacturer) fuel system. In other words, if an alterer adds an auxiliary system to a vehicle thereby reducing the performance of the fuel system, he or she has violated FMVSS 301 standards.
- The 1990 Clean Air Act states that an individual owner of a vehicle may modify his fuel system only if it complies with all federal regulations. If he does not, he will risk state and federal penalties.
- When an auxiliary system is added to a gasoline powered vehicle, the fuel must be drawn through a pipe at the top of the tank. Balance lines or tanks in series so that one tank supplies another is not permitted. Gravity feeding from one tank to another using a balance line is illegal for all systems except ICC diesel systems.
- Fuel line routing should allow for a minimum of 3 inches of clearance from the exhaust system or else a metal shield must be provided.
- Fuel lines should never be routed on the outside of the vehicle body.

 

To summarize that... Mount a fuel tank that states it is in compliance with clean air laws, etc and in a way that fuel is drawn from the top into your exisitng fuel system. You'd need to have a switch which powered one fuel pump while powering down the other. Your best betmay be to purchase the fuel pump and sending unit from the same model vehicle you are putting a tank into and use that to draw fuel from your auxillary tank so as to not confuse your truck's computer.

 

Well, I'm not in the USA so those requirements are moot actually unless I ever plan on selling my vehicle there which I really don't. I'm in Canada, and I'll be looking into similar laws here though the local race shop seems to think bottom plumbing the two together would be fine... Ideally I'd like to fabricate a three part tank, with some where the OEM tank is, possibly cutting it upwards a few inches into the floor in the back, then if I put a drawer system in that will be covered along with my other built-in gear, another in the right rear void, and another in the right sill, or just one in each sill though that would require relocating the SLS (or removing) compressor.

I'm still toying with the diesel idea, and that would make a lot of the regulations much easier since veg oil is not considered volatile at all.

 

If regulations don't prohibit it, then a balance line would probably work great (read only one fuel filler).

 

Still wondering about which pre-built fuel cells fit though. It's not easy to track down.