ncc74656 Posted September 30, 2014 Author Report Share Posted September 30, 2014 yes, its a cummins 5.9 nothing, gutted Link to comment Share on other sites More sharing options...
martydmb Posted September 30, 2014 Report Share Posted September 30, 2014 I can start my car just fine with temps well below zero when I only had 1 single d3100 in the car as a starting battery and no other batteries in my magnum that is the stock group sized batt needed for the car. Now I have 3.. and guess what... having 3 ill have even less trouble starting my vehicle in winter. When I had one and because of how cold it was (-21F) battery was at 12.1v. Started my magnum rt just fine. This summer that same battery on charged up on xs charger then taken off and sit for 24+ hours it would rest @ 12.79v. Get the same type battery as the rest that will fit in where your putting it. Your making this too difficult. Honestly of your not fully charging your batts when driving back home or when its sitting and are sitting at 70% well thats your problem.. take care and maintain them. Not hard. 05 dodge magnum rt DEH-80PRS Rockford fosgate T600.4 st200 tweeters Sundown Neo Pro 6.5 v2's 2 Saz-3500v2- Toolmaker dual 1/0 inputs 2 Sundown ZV4 12" D1 1/0 Sky High Power wire OFC 3 XS D3100- Toolmaker battery terminals Mechman 320 Amp Alt Smd Voltmeter KnuKoncept 1/0 OFC Link to comment Share on other sites More sharing options...
ncc74656 Posted October 1, 2014 Author Report Share Posted October 1, 2014 i have many short trips between jobs sites, my alternator charges at 14.6-15V while driving but i still arrive at less than 100% charge rates most of the time due to the large amounts of power required to start. i want to have a battery that can start my truck with out issue and does not have other current draws. 3 batteries is easily with in the specs of my alternator but i want a single battery in back for my starting. the ONLY single battery i can think of that is able to start my engine is a D8 or larger. thus thats why i want to buy a single battery and an isolator as thats going to be cheaper than 2 more group 49 AGM's. nothing, gutted Link to comment Share on other sites More sharing options...
MrSkippyJ Posted October 1, 2014 Report Share Posted October 1, 2014 And how are you going to keep that one charged if you already can't keep the others ones charged? F150: Stock 2019 Harley Road Glide: Amp: TM400Xad - 4 channel 400 watt Processor: DSR1 Fairing (Front) 6.5s -MMats PA601cx Lid (Rear) 6x9s - TMS69 Link to comment Share on other sites More sharing options...
ncc74656 Posted October 1, 2014 Author Report Share Posted October 1, 2014 well thats what i want the isolator for. if the battery ONLY starts then the rest of the truck is not pulling any power from it so its life should be relatively easy and its charge should remain rather high. nothing, gutted Link to comment Share on other sites More sharing options...
MrSkippyJ Posted October 1, 2014 Report Share Posted October 1, 2014 If you are starting your truck so often that a battery bank gets drained while being charged by the alt then a single battery will be damn near impossible to keep charged. F150: Stock 2019 Harley Road Glide: Amp: TM400Xad - 4 channel 400 watt Processor: DSR1 Fairing (Front) 6.5s -MMats PA601cx Lid (Rear) 6x9s - TMS69 Link to comment Share on other sites More sharing options...
Tarball Posted October 1, 2014 Report Share Posted October 1, 2014 need an alt with more balls - ditch the isolator idea CURRENT SYSTEM: Alternator: Stock alt on mids/highs Isolated DC Power 270 SP - Charging @ 16.8v Batteries: (2) XS D1400s Power Cable: Double Runs of 1/0 KNU Kolossus Fleks Headunit: 80-PRS Sub Amp: DC 5.0k Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones Subwoofer Enclosure: 9.1cubes @ 32hz - brutal. Mids & Highs Amp: CT125.4 Active Components: Mids RE XXX 6.5c Highs - 3 RE XXX tweeters per side(A pillar) Noise Control: Damplifier Pro all over the cab. Build Log If you do business with me please leave feedback here: FEEDBACK THREAD Highest Legal Score: 151.0 db Highest Musical 30 Second Average: 151.6 db Link to comment Share on other sites More sharing options...
ncc74656 Posted October 2, 2014 Author Report Share Posted October 2, 2014 i dont know what i can do in the alt department, i have the 900.00 Mechman alt... nothing, gutted Link to comment Share on other sites More sharing options...
martydmb Posted October 2, 2014 Report Share Posted October 2, 2014 How is that battery going to get charged? You didn exactly say.. by alt? If not you are using a single battery to start and will drop that voltage pretty good especially in winter so your going to have to charge it back up when you get home? 05 dodge magnum rt DEH-80PRS Rockford fosgate T600.4 st200 tweeters Sundown Neo Pro 6.5 v2's 2 Saz-3500v2- Toolmaker dual 1/0 inputs 2 Sundown ZV4 12" D1 1/0 Sky High Power wire OFC 3 XS D3100- Toolmaker battery terminals Mechman 320 Amp Alt Smd Voltmeter KnuKoncept 1/0 OFC Link to comment Share on other sites More sharing options...
SLYentist Posted October 2, 2014 Report Share Posted October 2, 2014 as i said, if you go with an isolator, you'll need a charger for the starting battery. just make it easy and wire the batteries as a trio bank. Cables and wires almost never fail; the terminations do. Link to comment Share on other sites More sharing options...
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