4 door Fj45 on 80 series chassis

[Blackknight1]

A guy was there watching us intall the tank and he said : " i guess you'll only have to fill up once a year ". We were all laughing

 

[Ditcherman]

It sure is....

Not even sure Accutune can help you with that!

 

[ceylonfj40nut]

You may have want to keep a 60 gal tank. Is fuel rationed where you are? If you need to hold some extra fuel in those situations it comes in handy. Fill 1/2 for most days. Add some air bags for when you add 60 gallons.

 

[Broski]

Are you sure you weren't using a 3 gallon bucket
62 gallons is a massive tank !

 

[FuglyYota]

So gas is lighter than water, about 6 pounds per gallon. So 372 lbs from fill to empty. Not the end of the world. Biggest thing is it’s aft of the rear axle, so all the weight is on the rear suspension. I second the airbags statement, especially with a load in the bed and people in the back seat.

 

[Blackknight1]

Are you sure you weren't using a 3 gallon bucket
62 gallons is a massive tank !

It is huge . We do get fuel shortages every time bandits decide to lock down fuel terminals. Fuel is also scarce in remote areas and many times ,the quality is questionable to say the least.
The buckets were 5 gallon ones. If you guys think it might be too heavy, I could make it smaller .... let me know what you think the issue might be. It fits perfectly between the rails.....

 

[Blackknight1]

You may have want to keep a 60 gal tank. Is fuel rationed where you are? If you need to hold some extra fuel in those situations it comes in handy. Fill 1/2 for most days. Add some air bags for when you add 60 gallons.

Hummm..... That could be a great idea. I will look into that. Thanks for your input.

 

[Broski]

It is huge . We do get fuel shortages every time bandits decide to lock down fuel terminals. Fuel is also scarce in remote areas and many times ,the quality is questionable to say the least.
The buckets were 5 gallon ones. If you guys think it might be too heavy, I could make it smaller .... let me know what you think the issue might be. It fits perfectly between the rails.....

I would say roll with it you don't need to keep it full. you might need heavier spring for the rear

 

[Blackknight1]

I would say roll with it you don't need to keep it full. you might need heavier spring for the rear

I know that i had gotten the heavy springs since I knew that I was gonna have that rear bumper. But I am almost sure that "Heavy" springs did not account for 372 lbs of fuel... I am not sure of the current spring ratings, but I will call Dobinson's tech line and ask them what they would recommend. Thanks Broski !

 

[prwillard2]

It is huge . We do get fuel shortages every time bandits decide to lock down fuel terminals. Fuel is also scarce in remote areas and many times ,the quality is questionable to say the least.
The buckets were 5 gallon ones. If you guys think it might be too heavy, I could make it smaller .... let me know what you think the issue might be. It fits perfectly between the rails.....

My only concern would be making sure it has some internal baffles of some sort to help with the sloshing. That is a lot of fuel moving around a corner.

 

[ceylonfj40nut]

Just got a tank built by a race car/ baja guy. Similar to yours. Some baffling ideas for you

 

[ceylonfj40nut]

Deep fuel pump pocket that level equalizes with the rest of the tank, good for sustained off camber needs. Doing a floatless level sender.

 

[Ditcherman]

Deep fuel pump pocket that level equalizes with the rest of the tank, good for sustained off camber needs. Doing a floatless level sender.

If the pocket equalizes, how does it help in a long term off camber situation with low fuel level? Do you just play the odds that it won’t be that off camber for that long? Does it return faster than it goes out of the pocket?

I stewed on this a long time before I built my tank, ended up putting a low baffle in it with a hole for a one way valve thing, hope it’s not a gimmick. The returns go into the baffled area.

First pic side view of the tank, second of the one way valve. Only a 34ish gallon tank and there is a center baffle in it as well.

 

[Blackknight1]

Just got a tank built by a race car/ baja guy. Similar to yours. Some baffling ideas for you

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Cool ! We did install baffles in mine. I also decided today that my tank was way too big , so we pulled it from under the truck and axed it right down the center. This brings down the fuel capacity to 31 gallons .
Yeah.... carrying all that weight right after the rear axle seemed a bit excessive.
Thank you all for your input.... Moving along.

 

[Blackknight1]

Deep fuel pump pocket that level equalizes with the rest of the tank, good for sustained off camber needs. Doing a floatless level sender.

Where are you getting the float less sender from ? I am interested in that .

 

[ceylonfj40nut]

Tanks T-GML-10 Floatless Fuel Sending Unit, 0-90 Ohm, 10 Inch

www.speedwaymotors.com

I am doing speedhut gauges

 

[Blackknight1]

Tanks T-GML-10 Floatless Fuel Sending Unit, 0-90 Ohm, 10 Inch

www.speedwaymotors.com

I am doing speedhut gauges

Thanks !

 

[Blackknight1]

My tank's current situation

 

[Blackknight1]

186 lbs of fuel instead of 372 is a huge difference

 

[Blackknight1]

Here are some pics of the rear doors. As I said further up i like those better than the welded together ones