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Power Strokes
7.3 Aftermarket
Battery Relocation
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[QUOTE="mikeeg02, post: 1371862, member: 24194"] Well Ive not started mine in -40 - -50, but mine always started at -10 - -20 here in Central/Northern PA. Im not trying to derail your thread, but have you put in an upgraded GPR relay (not a ford or ford replacement, there are much better options, and usually for less money), and I can only assume you are running 5w-40 oil correct? And you have hopefully replaced the glowplugs and gone over the harness to verify everything has good connection? Assuming all that is true, and your does just start that hard, I do understand the desire for additional battery. The business I work in is being on call for 911. When 911 is broken, I need to go, no ifs, ands, or buts. Truck not starting is not an excuse. So I can understand where you are coming from. In my modifying everything over the years, I have started to think when I modify or change something from OEM, how hard is it to fix when your stranded, and how hard is it to source parts. A$$uming standard batteries are easier to come by in the situation where you cannot start: I would put two of the larger group 65 sized batteries up front, in your case on the passenger side behind the head light. Then I would consider mounting a 4D or another larger group 65 series in a box on the frame rail, (or in the bed if you absolutely have to, but this increases your required wire size for starting) and takes up bed space. If you are 100% convinced you need two 4D batteries, then put one up front, and again if you can put the second on the frame rail in a box, if you cannot, in the bed, with two runs of 00 wire, (two + and two -). Because when the starter draws current, the last thing you want is voltage drop, because then current goes up, and its a vicious cycle that burns up the starter ultimately. Almost more important than all of this, is having clean connections, and properly crimped wire lugs. To properly crimp those wire lugs you said about above, you should use a 6 sided crimper. The one I have at work is an electric over hydraulic 12 ton crimper. Find someone who has one, it does make a difference. Heat shrink, and weather seal everything. Most people reading this thread are going to say yea yea, blah blah. But if you want reliability in absolute conditions over time, then you need to make reliable connections. [/QUOTE]
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