Aussie long range fuel tank questions (1 Viewer)

[swilson]

The directions that came with my Aussie tank don't even talk about connections and since my FJ40 didn't have a fuel tank in it when I got it, I could really use some advice here.



#1, #2, & #3 are all threaded bungs. #4 is three small tubes with no threads.

My best guess is #1 is engine supply. #2 is the return line. #3 could go to the vent line in the filler neck. Are those correct? And what should I be doing with the three small tubes labled #4? Cap them off?

For info, this tank is feeding a fuel injected CSB. (GenIII Vortec). It will have a frame mounted fuel pump and filter.

 

[jeffstoy]

#1 Is The Return, #2 Is The Engine Feed Line. #3 Is The Ouer Flow For The Filler Neck And #4 Are Vents That Go To To The Vent Box Below The Body Filler Neck. I Put Mine In Back In Feb. And You Are Right The Directions Were Very Vague. But You Will Love Iy . I Know I Do.

 

[swilson]

#1 Is The Return, #2 Is The Engine Feed Line. #3 Is The Ouer Flow For The Filler Neck And #4 Are Vents That Go To To The Vent Box Below The Body Filler Neck. I Put Mine In Back In Feb. And You Are Right The Directions Were Very Vague. But You Will Love Iy . I Know I Do.

Thanks for the reply. I don't think I have a vent box... and I definitely don't know what it is. Can you describe it or post a photo? For info, my FJ40 is a 1966.

 

[swilson]

Here is a photo from MAF's web site that shows the vent box you're talking about. Now what the heck does it do... I'm fairly sure my '66 doesn't have that.

 

[mikedickbek]

I'm curious also. I have that tank, but have been wondering about the vents also.

 

[bsevans]

The three vents go to the vapor recovery box that then bleeds off the tank pressure through the emission control system. It basically feeds the gas fumes into the carburetor so that tank pressure and vehicle emissions will be minimized. If you need a photo of one, let me know.

 

[swilson]

The three vents go to the vapor recovery box that then bleeds off the tank pressure through the emission control system. It basically feeds the gas fumes into the carburetor so that tank pressure and vehicle emissions will be minimized. If you need a photo of one, let me know.

Hmmm... anyone know how to make it work with a fuel injected CSB? I guess I"ll be capping off those tubes for now.

 

[Poser]

I am installing one in a 1962 FST 40 that is getting a Ramjet...

I am just going to cap them off.


Good luck!


-Steve

 

[bigbluefj]

what's the cost on one of those tank's i would like to replace the stock tank you sit on....

kevin

 

[65swb45]

Hmmm... anyone know how to make it work with a fuel injected CSB? I guess I"ll be capping off those tubes for now.

As long as #3 works for venting the tank on the filler neck, you will be good to go. I think it's safe to assume that the mfgr wanted as MANY vehicles covered as possible, which is why they included the #4 bungs on all the tanks. That particular bung configuration matches the factory vapor separator hookups found on 73-78 cruisers [and some mid-year 72's for you whiners]

Hth

Mark A.

 

[cruiseroutfit]

Has anyone running this tank installed a "surge" tank of somekind?

I have the tank in my 40, and with the exception of starvation problems, its great. When you have less than 1/2 a tank, and you are on a long sidehill (driverside down), the fuel can run past the baffles and the pickup runs dry. There was some talk about ideas to fix it a couple years ago... truthfully it has only happened to me twice and I was able to starter it out to a flat spot.

Two options I know of are running a surge tank, or running dual pickups (Holly has some trick ones that only pull fuel, not air).

Sorry for the hijack... get ready for the gas pump

 

[fjoakley]

If at all possible you should use the fuel vapor seperator. I just installed a '97 vortec with this long range fuel tank and installed the fuel vapor seperator very easily. I have read way too many posts out here talking about fuel vapor smell and pressure in the tank and all that stuff to not set it up this way. I now have no issues and no smells. My 40 never smells like gas and my garage never smells like gas (unlike my neighbor's garage from his bronco). Here is a diagram of the system. Part 45 is a plastic part with three small canisters, for you fuel to expand into, that goes under a metal cover shown in a previous reply. The three ports (#4) go into the bottom of part 45. There is then a nipple at the top of part 45 which goes forward to the engine compartment and plugs into the purge (charcoal) canister. The purge canister then has a vent open to the atmoshpere and a vent with a line that goes to the intake manifold through the Purge Canister Vacuum Switch so that the vapors can be burned. Fuel will expand a lot with tempurature changes. If you have a full tank and no where for that fuel to expand to you are asking for trouble. If all you use is the port back up to the filler neck the tank will fill fine but the fuel still has no place to expand to when the tank is full. You can try to use a vented filler cap but then you will smell gas in your garage - especially on warm days. My cruiser did not have the system when I got it and it used to swoosh when I opened my filler neck because of pressure build up. I posted for one out here and found one for like 30 - 50 bucks and it was well worth it. If the pressure builds up too much it can actually force fuel into the engine and cause you some real issues with hydro lock. that is unusual but I read about that happening to someone out here.

Greg

 

[fjoakley]

cruiseroutfit,

I was going to put a surge tank on my system or fuel accumulator and still may if I run into problems. I have a system that I found on this site

http://bcbroncos.com/store/product_info.php?products_id=119

I just didn't use it yet because I did not want to do two fuel pumps if I don't have to. You need to put a high volume low pressure pump between the accumulator and the tank and then a high pressure high volume (on the vortec) pump between the accumulator and the engine. This system is cool because it is actually a big (about a quart) fuel filter from a big commercial diesel engine. Your fuel return line (with injection) actually goes through this system before it goes back to the tank. One quart of fuel fed by the return should get you through any off camber situation. I am going to run my tank and see if I run into issues if I do I will then add the accumulator.

Greg

 

[swilson]

goes forward to the engine compartment and plugs into the purge (charcoal) canister. The purge canister then has a vent open to the atmoshpere and a vent with a line that goes to the intake manifold through the Purge Canister Vacuum Switch so that the vapors can be burned

So you added a charcoal canister to your engine swap setup? Got photos or more info? Where is the purge canister vacuum switch located? I wonder if that is switch is wired in with my custom harness.... hmmmm.

 

[cruiseroutfit]

cruiseroutfit,

I was going to put a surge tank on my system or fuel accumulator and still may if I run into problems. I have a system that I found on this site

http://bcbroncos.com/store/product_info.php?products_id=119

I just didn't use it yet because I did not want to do two fuel pumps if I don't have to. You need to put a high volume low pressure pump between the accumulator and the tank and then a high pressure high volume (on the vortec) pump between the accumulator and the engine. This system is cool because it is actually a big (about a quart) fuel filter from a big commercial diesel engine. Your fuel return line (with injection) actually goes through this system before it goes back to the tank. One quart of fuel fed by the return should get you through any off camber situation. I am going to run my tank and see if I run into issues if I do I will then add the accumulator.

Greg

I checked that one out a couple years ago, but I'm glad you re-linked it, I wasn't able to find it recently. I actually have a ~1 quart fuel spin-on filter that is setup just like the Bronco site does it... but I too didn't ever get around to adding a second fuel pump. I am a big fan of the OEM mechanical pump, I'm not real big on adding a low press. pump. The plan was to install all this when I swapped in my 3FE or did the 2FE swap, considering I would have to add an electrical fuel pump system.

I can't find the Holley pickups on their website, I know the old part # was 12-951 ??

 

[fjoakley]

swilson,

the vortec should have had a purge canister in the doner vehicle. I took mine from the donor when I pulled the engine. some are square and some are round the one in mine was round. they are usually on the driver side front of the engine conpartment. It should be stock with the vortec. I moved mine in the cruiser to the passenger side firewall because that is all I had room for. I am attching a picture. The round black cylinder is the purge canister. it is not hooked up in this picture but the purge canister vaccum switch is the item with the blue plug in the manifold you can see in the picuture. This is a 1997 5.7 ltr vortec. let me know if you have more questions.

Greg

 

[swilson]

Thanks for the info. What connections are there on the purge canister? One hose from the gas tank & one to the purge canister? Is there any wiring that goes to it, or is it purely a passive item? I'm working with a crate motor... so I'll have to do some hunting to find a donor canister I guess.

 

[peesalot]

Caping off #4( all 3) is going to depend on your gas cap. If the only vent is #3 then the cap should be of the positive locking type that blows the pressure at a certain lbs. Or you may have the stock cruiser cap that just lets air out and fuel to if you are sidehilling or twisted up. I put a filler from a late model dodge pu on ( 3 hole mount ) but the blow off spring lbs was a little to hi cause every time you opened cap it blew like a whale. So I ran 1 of the seperator lines to a cage top breather.

 

[fjoakley]

Thanks for the info. What connections are there on the purge canister? One hose from the gas tank & one to the purge canister? Is there any wiring that goes to it, or is it purely a passive item? I'm working with a crate motor... so I'll have to do some hunting to find a donor canister I guess.

There are three ports on my purge canister (1997) one that comes from the fuel vapor seperator (I really would suggest you install it), one just open to the air, and one that goes to the vapor switch (manifold). THere are no wires to the canister on the 1997. If you need a canister and can't find one I have one from a 1999 vortec. I got it because it is retagular and where I was origionally trying to mount it I thought it would fit better. That one does have wiring that goes to it and goes to the port that is open to the air so they probobly added some type of emmission control. If you want that one I paid $25 for it I would send it to you for 20 plus shipping. Let me know. I do not think you would need to hook up the wire at all.

Greg

 

[fjoakley]

I checked that one out a couple years ago, but I'm glad you re-linked it, I wasn't able to find it recently. I actually have a ~1 quart fuel spin-on filter that is setup just like the Bronco site does it... but I too didn't ever get around to adding a second fuel pump. I am a big fan of the OEM mechanical pump, I'm not real big on adding a low press. pump. The plan was to install all this when I swapped in my 3FE or did the 2FE swap, considering I would have to add an electrical fuel pump system.

I can't find the Holley pickups on their website, I know the old part # was 12-951 ??

Is that the holley that had the fuel pump inside of the surge tank like an in tank pump? If so I remember that because I was going to use it but Holley discontinued that a couple of years ago. That is why I bought the BC broncos sytem which I did not use - yet.