813 Fabrication & Design
Rock Sponsor (Level 1)
- First Name
- Jeremy
- Joined
- Dec 21, 2019
- Threads
- 44
- Messages
- 761
- Reaction score
- 1,009
- Location
- Louisville, KY
- Website
- www.813fabrication.com
- Vehicle(s)
- 2020 Jeep Gladiator Rubicon Launch Edition
Great write up! I'm glad it worked out well for you. Looks greatNext up, onboard air.
I looked at a few options, and settled on the @813 Fabrication & Design mount for behind the rear driver's side seat. I like that it's up and out of the way from rocks and rain, and also hidden away from curious hands when the top is off. I don't have air lockers, so it's only powered on when I need to air up. That means I don't need to worry about noise in the cab when it turns on or heat against the back of the seat. So far, use has always been with me out of the cab running the hose, and the seat folded down.
The mount was rock solid and very well made, and the instructions are great. It's a tight squeeze to get it in there, but in the end it fits like a glove.
Compressor is the ARB dual. A little pricey, but I plan to hit the road for some extended travel later this year, and I didn't want to have to worry about the gear I'll use a lot. In a few test air downs/ups, the dual ARB could get my BFG KO2s 35/12.5 up from 15 to 36 in about 2 minutes each. I didn't get a lot of heat off the unit, either.
I learned a few things during the install, but I'll say the big challenge in installing the ARB dual compressor in that location was the wiring. I followed the advice of pretty much everyone and committed to a direct connection to the battery. In the spirit of keeping the fuses as close to the battery as possible, and making sure the wire that was exposed outside the cab was top quality and well protected, I decided to add the wire I needed right at the plug end and use the original ARB harness to go from the battery and through the firewall as far as it would take me. The good news is, the ARB power harness in that nice, thick cover easily crossed the engine and made it in through the firewall at the hole above the driver's side footwell. The original harness even made it about 18-inches into the cab, which let me do all the splicing inside. Since I was adding to the plug end of the harness, I ended up needing about 6 feet of wire to two 10-gauge power lines and two 10-gauge ground lines (the ground is one 8-gauge at the battery side, a splice ARB does somewhere inside that harness).
I took my time, used plenty of heat-shrink tubing, and pulled a lot of interior body panels, but it made for a nice clean wiring run in the end.
From the battery and across. I took a few 1-inch rubber lined metal wire looms I picked up at Home Depot and re-bent them to work under the existing nuts and captive washers along the front of the engine bay. Keeps it neat and out of harms way.
Through the firewall at the plug where the clutch would be. I drilled a 3/4 inch hole in the factory cap and then reinstalled it. I sealed it from the inside and out with black RTV silicone. No air or water leaks so far, and the heavy jacket on the ARB harness protects the wires from the cut plastic plug (that's the GMRS antenna cable going in there with it).
Down inside the factory wiring path from front to back, and then inside the rear panel beside the seat. The wire comes out behind the seat belt and comes up behind the seat. I added some Harbor Freight plastic sheathing in places it looked like the wires might rub anything. I'm not eager to see two 40-amp hot power lines try to melt my cab.
The ARB switch needs a lower-amp ignition power source for its relay, so I picked up the extra ignition power line that's bundled with the Aux wires above the passenger footwell. Routing was the same, just on the other side, and I took the opportunity while I had that side open to run a 12-gauge power line from the Aux 1 wire to the back under the seat. I'll use that to power a DC panel back there for my fridge, once the 60-seat is out and the platform is in. I didn't worry about a light for the switch, since the interior light in the rear panel is right there.
A few other random tips:
All in all, I absolutely love this set up. Great (if tight) fit. Secure from road debris, weather and idle hands. And rock solid. I haven't heard a rattle of a creak since it went in.
- Pay close attention to the tips 813 incudes in the instructions about adjusting the compressors in the ARB mount, and rotating them so the fitting is far to the outside. It made a huge difference in how they fit.
- Leave the switch out of the mount until after you bolt it into place. The bolt is a bear to reach once you've dropped the package in, but with the switch out its a straight shot down with a decent 10-inch extension.
- If possible, get the wiring done before the final bolt in of the mount and pumps. That will let you plug the power and switch harnesses into the pump while you can still reach them. Once the pump is in and bolted down, squeezing the plugs and your fingers in there is murder, and trying to keep the other side of the plugs from just sliding away is darn near impossible. I did it, but I put more than a few dents in my hands along the way.
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