Installing the Boyd Welding gas tank
This update covers the Boyd Welding gas tank.
Related notes live on the Factory Five Cobra build hub.
Boyd Welding gas tank: Positioning the Boyd tank
I chose the Boyd Welding MKIV roadster tank. Because many folks said a larger tank is great. Also, it is a fantastic design! My prior post was getting the tank ready for installation. So here we go!
First, I positioned the tank under the rear section. Then I used towels to protect the powder coating. Meanwhile, it is a tight fit that needs a little massaging. Also, getting the height correct is important. You might assume this is a two-person job. However, I got creative. So I used 4 bungee cables to hold the tank in place.

Using the bungees holds the tank while I position the tabs. Then the rear of the tank lines up under the back of the frame. First, I measured about 4″ in from both sides for the bolts. Also, I used the same bolt and nut combo from the FFR tank straps. Next, I set the rear tab flush with the back of the chassis. Because that leaves enough front tab coverage for those connections. After that, I had to pull the tank to drill the tabs. Meanwhile, I do not have a 90″ drill chuck. Still, a step bit worked perfectly for this setup.
Bolting the tank down


Second, I mounted the rear tabs to keep the tank level. Then I used a level through a little trial and error. Ultimately, I got the tank 1.3″ all around under the “V” rails in the trunk. Also, the rear tabs are about .5″ wider than the 3/4″ rails. So I added a nut inside the tabs for space. As a result, that keeps the tabs from crushing. Meanwhile, the nyloc nut went on the ends outside the tabs.

Finally, it only takes 4 bolts to mount this tank. Also, it looks great IMHO. Besides that, I gain another 10 gallons of range for the roadster. Meanwhile, I may do a mini-drop trunk mod for a little more trunk space. It is not much. Still, every bit helps in this trunk! Ultimately, this tank should reach over 400 miles per fill with highway driving.





Overall, I am very happy with the install! First, it is a quality built tank. Also, it does not need much modification. Then I get more miles per tank. Besides that, I gain a solid fuel pump to feed the Coyote Gen3.
