108”-110” TJ, Low CG and No Fuel Tank in the Back Seat? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 06-30-2007, 04:06 PM   #1 (permalink)
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108”-110” TJ, Low CG and No Fuel Tank in the Back Seat?

I’ve been reading some TJ stretch projects and thinking about strecthing my TJ. I want to go with 40’s on full width axles and I want to keep the CG as low as possible. Seems like every TJ stretch project I’ve read ends up with the fuel tank in the back seat area inside the Jeep.

Is there anyway around putting the fuel tank inside on a TJ stretched out to 108” to 110”?

Thanks for any help,
NIB
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Old 06-30-2007, 04:44 PM   #2 (permalink)
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are you trying to build a 4 seater, or are you just in need of a lot of storage in the back and dont want the cell to take up all your room?
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Old 06-30-2007, 05:02 PM   #3 (permalink)
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I am interested in the same-my rear seat area is filled with a large storage box.
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Old 06-30-2007, 05:06 PM   #4 (permalink)
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I am also interested
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Old 06-30-2007, 05:22 PM   #5 (permalink)
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Im going to build my own tank, that will pretty much be the floor of the jeep. It will be tall enough, that if I were to put a seat on it, passengers would probably have legroom instead of sitting pretty much on the floor. If that made any sense.......
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Old 06-30-2007, 05:45 PM   #6 (permalink)
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i plan on using one of gen rights tanks so i can get around a 5" stretch, then i plan on stretching the front 5-6". If you want to keep the tank out of the body this is one of the only ways i see to do it with extending the wheelbase that much.
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Old 06-30-2007, 05:49 PM   #7 (permalink)
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are you trying to build a 4 seater, or are you just in need of a lot of storage in the back and dont want the cell to take up all your room?
No, back seats are long gone. I just need lots of storage room in back for "stuff".

Thanks for the response.

NIB
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Old 06-30-2007, 05:51 PM   #8 (permalink)
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i plan on using one of gen rights tanks so i can get around a 5" stretch, then i plan on stretching the front 5-6". If you want to keep the tank out of the body this is one of the only ways i see to do it with extending the wheelbase that much.
10-11" of strech = 103-104"

You'd have to move the axle out quite a bit going that route. 10-11" of stretch in the front is quite a move. From everything I've looked at there is no way to stretch the rear axle that far with a low COG and keep the tank there.
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Old 06-30-2007, 05:52 PM   #9 (permalink)
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i plan on using one of gen rights tanks so i can get around a 5" stretch.......
I looked at those, but I think I want to push the rear axle back farther than 5".

NIB
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Old 06-30-2007, 06:24 PM   #10 (permalink)
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I looked at those, but I think I want to push the rear axle back farther than 5".

NIB
well then you are pretty much going to have to submerge a tank in the floor, or have one custom made.
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Old 06-30-2007, 07:28 PM   #11 (permalink)
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I’ve been reading some TJ stretch projects and thinking about strecthing my TJ. I want to go with 40’s on full width axles and I want to keep the CG as low as possible. Seems like every TJ stretch project I’ve read ends up with the fuel tank in the back seat area inside the Jeep.

Is there anyway around putting the fuel tank inside on a TJ stretched out to 108” to 110”?

Thanks for any help,
NIB
i seriously doubt it. and WHY anyway. scrap the tank, it's in the way and too bulky. go fuel cell.
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Old 06-30-2007, 07:40 PM   #12 (permalink)
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Quote:
Originally Posted by NIB-98TJ View Post
I’ve been reading some TJ stretch projects and thinking about strecthing my TJ. I want to go with 40’s on full width axles and I want to keep the CG as low as possible. Seems like every TJ stretch project I’ve read ends up with the fuel tank in the back seat area inside the Jeep.

Is there anyway around putting the fuel tank inside on a TJ stretched out to 108” to 110”?

Thanks for any help,
NIB
Yes, I think it is possible.

I have the suspension, axles,tires... waiting to do exactly that. Just waiting on my new shop to be erected

I'll be using poly performance 4 link front and rear, and built 79D60s. Already have the Genright Comp tank and the flat skid installed(didn't need the shop for that). I will move the rear back 6" and the front forward about 8" and hopefully end up at 108" WB... using 3" lift TJ springs and coil buckets relocated, I think it can be done! It just cost me a wad of cash for the goods. Looking to start in Mid July and post it here.

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Old 06-30-2007, 07:43 PM   #13 (permalink)
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If ya'll are going back 6+" why not build a tank to go forward of the axle?
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Old 06-30-2007, 08:52 PM   #14 (permalink)
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if your not worried about rear seats, just need a lot of storage, i'd say build the jeep the way you want it and worry about the fuel tank later. you can build or have built, a tank that fits just about anywhere. you can make one that fits behind the driver or passenger seat, in between but slightly behind the seats, etc. a 10 gallon tank isnt going to be that large.
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Old 06-30-2007, 09:10 PM   #15 (permalink)
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If ya'll are going back 6+" why not build a tank to go forward of the axle?
that actually sounds like a good idea
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Old 06-30-2007, 10:01 PM   #16 (permalink)
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that actually sounds like a good idea
Not really, If you want a low cog then the links will be in the way
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Old 06-30-2007, 11:52 PM   #17 (permalink)
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Not really, If you want a low cog then the links will be in the way
yea good point
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Old 07-01-2007, 07:06 AM   #18 (permalink)
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i'd say build the jeep the way you want it and worry about the fuel tank later.
I would guess that's how most of the fuel tanks end up in the back seat area.

I'm going to keep researching and maybe I will find a build-up with a strechted 110" TJ with a custom tank underneath the body somewhere. If anyone knows of one, please post up a link.

Thanks for all the responses,
NIB
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Old 07-01-2007, 07:42 AM   #19 (permalink)
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how big of a tank were you thinking about using?
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Old 07-01-2007, 08:22 AM   #20 (permalink)
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I'm think stock is about 15 gal. I would be nice to get that much, but I could do with less if I had to. I would say at a minimum 10 gal., 12 would be better.

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Old 07-01-2007, 09:00 AM   #21 (permalink)
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My thought is to make a tank that's about 4" thick and mount it over the diff, under the rear floor. This will be fuel storage. Transfer fuel from there at low pressure. To a 1 gal tank up front with the high pressure pump in it.
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Old 07-01-2007, 09:02 AM   #22 (permalink)
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I'm going to keep researching and maybe I will find a build-up with a strechted 110" TJ with a custom tank underneath the body somewhere. If anyone knows of one, please post up a link.
There is a simple solution to this issue you know. Right now I'm building a YJ with full-widths and 40's, and like you I want 104"-108" W/B without putting the tank in the tub. My solution....stretch the frame and body (12" in my case) to your desired length by cutting the tub and frame (somewhere between behind the front seats and the center of the rear wheelwell) and adding material. This will gain the W/B without worring about the tank, not to mention the additional room!
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Old 07-01-2007, 09:20 AM   #23 (permalink)
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stick this thing behind your seats. thats dead space anyway.
Length (in): 30.000 in.
Width (in): 9.000 in.
Height (in): 12.000 in.
15 gallons, $229.95 from summit racing.






get 2 of these, im sure you can find a place for them.
Length (in): 9.000 in.
Width (in): 10.000 in.
Height (in): 17.000 in.
4 gallons each, $100 from summit.






another behind the seat candidate, this one is even taller and skinnier than the 1st.
Length (in): 30.000 in.
Width (in): 7.000 in.
Height (in): 17.000 in.
15 gallons, $239.95 from summit.

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Old 07-01-2007, 10:23 AM   #24 (permalink)
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i built a TJ with the fuel cell like this one
http://static.summitracing.com/globa...ci-2171a_w.jpg

but it was the one that was only 7" tall(basically that cell turned on its side). i mounted it under the seat by cutting a hole in the floor, then uses some 1/4" x 2" alum. angle and welded it all along the top edge all the way around.. that allowed the cell to sit down in the floor about 5". i built a small tubeframe to support the seat and i used the flush mount filler, so to fill it up all you did was flip the seat forward. because the tank wasnt that tall it did cavitate alot on side hills and inclines/declines.. it also didnt allow me to get much triangulation in my uppers since the jeep sat so low.. aslo b/c it was so shallow and it was in a TJ i couldnt use the stock pickup,and i ended up having to buy a fuel pressure regulator and fuel pump.if i had it to do all over again i would, b/c other than a few fixable problems it worked great.. i think next time i will have a custom cell built with baffles, and have the rear of it shaper more /\ instead of a more square shape, so i can get more triangulation out of the rear uppers.. i'll see if i can dig up som e pics tonight
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Old 07-01-2007, 11:33 AM   #25 (permalink)
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cut the frame in the middle and strech it there... do a little body work and you end up with more leg room/storage
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