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Building a Dodge Exo

52K views 167 replies 35 participants last post by  Topar  
#1 ·
I have been saying i need an exocage for a LONG time now. With the trails that I ride, I have been pretty lucky that I haven't rolled.

I am using a JD2 bender and designed a RamV style bed on Bendtech software.
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I picked up 140ft of 1.75" dia .120" wall 1020 DOM for $3.25 a foot. It doesn't look like much, but it's 7 20ft sticks.
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First step was to scrap the bed- 560lbs that I got just less than $50 for at the scrap yard.
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I started with a hoop that's just a little bigger than the cab. It's not perfect, but I was learning as I go.
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I haven't welded in a while, but I was doing OK and it came back quickly. Fits were alot of work- I used a pipemaster, which also took some learning. The fits are critical as that is where the support comes from in a roll...
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This is what I've got so far... mocked up on the frame.
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I have alot of tubing to add, gussets, mount for hi-lift & CO2 bottle, som sort of floor, spare tire mount... but it's coming along an has been a challenge, but a good time nonetheless. More to follow...

I have used about 90' of tube so far with no scrap over 4"- I will need at least two more sticks and maybe more to finish it out.

TD
 
#3 ·
nice start. how come you're not bobbing the back a little more? Looks like you'll need a little room for the fuel cell as well? What size are those TSLs?
 
#6 ·
44 TSLs

There is still a big bumper on the back that protected the bottom of the rear fenders and mounted a winch. That will all come off and the frame will be cut behind the spring hangers. I will cut the factory rear crossmember and remount the winch and just the center piece of the rear bumper. I thought about back-halfing the whole truck, but the cost of going to a 3 or 4 link and coilovers (or even just springs) got out of control fast. I need some protection and the factory bed was toast- so Exo it is!

I am trying to figure out what to do about a fuel cell. I'm not to sure about how to go about a new tank with a new sending unit... not even sure what pressure I would need to feed the mostly stock motor... Any suggestions? I looked at getting a Jeep Grand Cherokee tank and sending unit like RamV, but apparently these aren't that easy to find locally...

TD
 
#8 ·
I think Overcompensation used his stock fuel tank, he put it across the rear of the cab over the frame.
I did the same but using a Dakota tank because the extended cab long box tank was hanging out to far on either side and would have gotten damaged somewhere.
I still used my stock sending unit.
It seems most Dodge and Jeep have the same set up with the big screw on cap for the pump/sending unit so just keep your stock one.
 
#9 ·
The stock tank is just too big for what I want to do. Dodge and Jeeps both have the big screw in pumps, but I think they are different heights and I am not sure what the pressure/flow is for the Jeep 6cyl, but I would bet it is different. I looked at a Gen-Right Jeep fuel cell which is nice, but they are $700 and they couldn't tell me if the Dodge pump will work with it.

I would like to go with some off the shelf RCI cell (or other brand name), that I could hook up to an aftermarket pump. I just don't know about pressures... I could use any sending unit (GM is standard on most fuel cells) as I have no problem adding an aftermarket fuel gauge.
 
#11 ·
as long as the donor tank and pump setup is mpfi then you will be fine..Efi has low pressure(TBI) and higher pressure (MPFI,CPFI).
One difference in the high pressure setups are the return less systems..The pumps are about the same but the regulators are different.Most that i've worked with have the regulator set the pressure and also return the fuel..

In the end you could alway swap just the pumps from unit to unit if you have any concerns or cant find actual specs.Its fairly easy to do.

When i had my dodge i looked into gen right tank fitting( the big one that you screw the pump hold down nut to) But they guy on the phone said the jeep one was different than my dodge..If it fits then you could get an aluminum fuel cell and reuse your sender assembly. From what ive seen of the dodge stuff most of them have the sump as an integral part.

Aftermarket senders are available to work with dodge gauges as well..No need to install aftermarket gauges for that.
 
#12 ·
I found an OEM manuf site for the pumps and it noted 40psi on the pump.

This is a returnless system though. If I were to pick up a regular aftermarket fuel cell and inline pump with 40 to 50psi- would there be any issue running that on a returnless system? Yes I am a moron when dealing with fuel delivery- I just don't want to buy anything that won't work or buy some expensive shit I really don't need...

Is a gravity feed to the pump an issue? The sump type of pump seems like it would be a better choice for an off road rig that will see extreme angles.
 
#13 ·
Take apart your sending unit and you will see that it's made in 2 pieces.
The gauge, pump and fuel filter are independent from the screw cap in a housing that can slide up or down and will fit several different tanks.
 
#14 ·
When I swapped a 97 mpi magnum motor into my 86 ramcharger, I used a Summit Racing brand aluminum fuel cell, Summit racing electric fuel pump, and a an aftermarket regulator. The pump is an external mount unit that i just mounted on the wheel well next to the cell. I have my regulator mounted next to the tank right by the pump, with a return line going right back to the fuel cell.
I only had to run 1 new fuel line to the motor, Though, you should be able to reuse most of your stock fuel line.
Your best bet will be to run a guage on your fuel rail to measure the pressure at the rail, mine is set at 55 psi, but i have some pressure drop, due to the guage being mounted on the regulator. 50 psi at the rail is fine.
If you want I can get you part #s for everything I needed.
Trucks looking good. I'm going to be doing something similar when I start my next project, but mines an 87 regular cab.
Good Luck, Pat
 
#17 ·
#23 · (Edited)
Graduated from Amherst in '95... seems like a millions years ago, but I loved that place.

Looks good, love the style. :D

Car-parts.com for the tank.

Do a GC tank and pump. I think I did a '98 but both the 5.2 and 5.9 used the same pump. A little fuel hose and some wiring, and you are done.
Yup- stole your design for sure... consider yourself my idol!! LOL!! Still thinking about the GC tank, also considering a whole aftermarket setup with fuel cell and off the shelf pump and filter... Easy and cheap to fix if I have issues.



Todd
 
#27 ·
Looks good but worthless without a bed. I know your not done. Bed space is nice.
 
#29 ·
It is more for protection in a roll than to haul anything. Unlike Alaska- Virginia doesn't allow the tall truck/big tire thing on the roads... and we don't have the kind of land to do the excursions ya'll do. All I need in the bed is the spare tire, fuel cell and a cooler... Enough to have a good day on the mountain and enough parts to get back to the trailer.

Yup, needs a floor. I thought I had posted these already but I guess it was a different thread:

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Pretty much what I am going for- good pics. I wanted to get the cage itself done and installed, In due time I will follow up with some sheetmetal to form a bed and fenders. As I said above- the bed will only need to hold limited items, so it will be pretty small.
 
#31 ·
Wouldn't doubt it- my truck is registered and insured, but has not been inspected in about 5 years. With the ~30" bumper height law- I used to get pulled over all the time with 38s which was marginal. Now with 44s, I am not even close! The state troopers that run this end of I-81 have nothing better to do. I drive it on the road in TN and KY when on wheeling trips- they could care less about inspection stickers and the truck is otherwise legal.

BTW- nice truck.
 
#32 ·
It's not mine, I'm just the co-fabricator. It's currently torn down getting a Ford high pinion D60 up front and a 14 Bolt out back.

Around here we get hassled as well so we have to keep things fairly low. The local trail is on USFS land and so everything that goes across the trail must be street legal in Virginia. No buggies or cobled together rigs allowed and they enforce it pretty well. It helps to go to an inspection station where they have no idea what they are looking at, lol.