38 Gallon Fuel Tank in CJ5????

Ok now that I've got your attention. I have a full size Ford Bronco that was rolled a little while back while the outside of the body is junk, everything else is good. Southern truck, absolutely no rust on the underbody or floorboards. I'm using the floorboards to repair the ones on my Jeep instead of buying a complete front floor pan. Now back to the topic at hand. It has a brand new 38 gallon fuel tank and a very nice skid plate. Would it be possible to mount this fuel tank in the rear where the stock fuel tank is located? Fabrication would be needed of course but would it be feasible? It will be lifted 4 inches with 34" tires. Just a thought to make my Jeep get that extra mile on long trails or trips. Just think how not so often I'd have to fill up. Also for fuel fill, instead of being at the rear, I was thinking of adding it through the side with a billet aluminum fuel filler cover for a YJ. What are your thoughts, please let me know, Thanks,
Mike

 

I doubt it will fit w/o modification. If the frame width and the length from the rear axle to the rear of the vehicle are the same or the jeep's bigger it might be an easy fab but if not the tank will need cut down.

 

i run the LARGE plastic cj tank in the rear, and the under seat tank. i have a totel of 110 litres ( i dont know the conversion to gal ) with this combination i am able to go two weeks back and forth to work and do some running around on the weekend

i used the tank switcher from a chevy truck, it works awsome and has a factory look to it.

 

My first thought was on a full tank of gas you could do wheelies.

 

Truck didnt happen to have a 300 straight six in it did it?

 

Straight six would've been nice, but it had a 351 4 valve windsor motor in with C-6 trans.

 

I feel kind of dumb saying this, but what is the capacity of a stock CJ fuel tank, rear mounted?

 

15 gals I think

 

Ok, so maybe the 38 gallon fuel tank is a little over kill. Now I have an awesome RX-7 fuel tank, similar dimesions with a whole whopping 16.6 gallon capacity, however it does come with an electric fuel pump................I don't know if its worth the hassle though, I don't know if the Jeep fuel gauge would read the signal from the mazda's sending unit etc. We'll see, do you guys think an electric in tank fuel pump would be beneficial?

 

I just pulled my 15 gal. tank out to install a tank in the rear seat area.Theres no way to get that big of a tank under the 5. I had to trim down the one i had that was stock to get it to work. You would also have clearance problems on the trail. I took mine out for clearance for the dana 60 iam putting in.The tank i pulled is a couple of years old if your interested. Its a stock 15 gal.

 

We have dual tanks (underseat and rear) with a switch between the seats. Peter also used PVC for all the rear connections to avoid water when doing water crossings.

Beth

 

Gas won't eat it's way through PVC?

 

I would think so, but maybe it's not regular PVC? It hasn't in 25 years now. FRP pipe is used in gas station design work I do.

Beth

 

I can't answer any of the Mazda specific questions for you but I can say that if you are running an EFI system, I think that retrofitting a factory in-tank pump would be the way to go. My reasoning is that it would really, really suck to be out in the middle of nowhere with a dead or dying aftermarket fuel pump. At least with a factory pump you could go to the closest dealer, parts house or junkyard and have a decent chance of picking one up on the spot. That being said, if it's impractical to graft a Chevy pump to whatever tank I end up using, I'll probably take the easy way out an buy a Holley or Howell external pump and chance it.