jeffm4688 Posted June 29, 2012 Report Share Posted June 29, 2012 (edited) So with the second battery I'm putting in my trunk I should just run my now power wire to the positive on my alt and use the run going to my trunk? & no big 3 would be needed then correct? As of right now my 1/0 is attached right to the post on my fuse box where the alt drops power off to. Can I keep it like that and just connect to my rear battery cause how I see it its the same thing. Fused on both sides of course Your best path to do this is to simply do a Big 3 (1/0 engine ground, 1/0 to your main battery, and 1/0 from your main battery ground to chassis) And then to run a 1/0 from the main battery positive to your rear battery positive. The whole point of a Big 3 is to in theory get maximum output from your alternator by increasing the wire size (causing less resistance) Edited June 29, 2012 by jeffm4688 Quote Team L.I. S.P.L - DC XL 18 M2 - DC 3.5K - Mechman 270 - XS & Shuriken batts Link to comment Share on other sites More sharing options...
ZachG Posted June 30, 2012 Report Share Posted June 30, 2012 So with the second battery I'm putting in my trunk I should just run my now power wire to the positive on my alt and use the run going to my trunk? & no big 3 would be needed then correct? As of right now my 1/0 is attached right to the post on my fuse box where the alt drops power off to. Can I keep it like that and just connect to my rear battery cause how I see it its the same thing. Fused on both sides of course Your best path to do this is to simply do a Big 3 (1/0 engine ground, 1/0 to your main battery, and 1/0 from your main battery ground to chassis) And then to run a 1/0 from the main battery positive to your rear battery positive. The whole point of a Big 3 is to in theory get maximum output from your alternator by increasing the wire size (causing less resistance) I plan on doing a big 3 in the upcoming week or two. But ok it looks like that's what I'm going to do I already have a 0 gauge run going to the rear. Quote 1998 Pontiac grand prix gtp supercharged2 12" Obsidain Audio V.1 on a 2011 zx1500.1 at 2 ohms. 20ft of Knuconceptz CCA 0 Guage. 2nd Battery is a Shurken BT-120. Box is 3.5cu tuned at 31.8hz sealed off from the trunk. 14sqft of Dynamat on the Rear deck top & bottom. Soon to be more for doors/roof. Gets low & loud Did a 140.5 Sealed at Battle of the boom in June 2013 dropping to 12.7v (need a alt mines going bad) Link to comment Share on other sites More sharing options...
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