sprkn_ranger Posted July 12, 2012 Report Share Posted July 12, 2012 You won't blow your alternator if you wore up a second battery. Just wire parallel (pos-pos and neg-neg) and if its a run of a few feet or more, fuse both ends of the positive wore as close to the battery's as possible. No new for isolators or any of that crap. Quote Check out my build log! 4 Havocs in a blowthrough http://www.stevemeadedesigns.com/board/topic/187506-sprkn-rangers-blowthrough-build/ Link to comment Share on other sites More sharing options...
sprkn_ranger Posted July 12, 2012 Report Share Posted July 12, 2012 wat amp fuse should I use? You fuse to whatever the wire is rated for. So if your using 1/0 OFC then you can fuse at around 280-300, if it's CCA I believe no more than like 180-200. (someone correct me if I'm wrong) Quote Check out my build log! 4 Havocs in a blowthrough http://www.stevemeadedesigns.com/board/topic/187506-sprkn-rangers-blowthrough-build/ Link to comment Share on other sites More sharing options...
HunterJohnson Posted July 12, 2012 Report Share Posted July 12, 2012 this has been answered time and time again. Wire in parallel, pos to pos neg to neg, fused WITHIN 18" or less from front AND rear battery. Gel mixed with AGM is not optimal bc the Gel battery rests at a lower voltage causing the AGM to continuously "charge" the Gel until they get equal voltage. Over time I believe this can mess up the AGM battery. I did this for 3 months then changed to all AGM batteries and everything was and still is fine. NO ISOLATOR totally pointless IMO Quote Scion tC SQ BuildiPad mini, lots of fabrication, daily drivenFord Explorer C Pillar Wall Build Just a cheap car to destroy with bass Link to comment Share on other sites More sharing options...
lotus Posted July 12, 2012 Author Report Share Posted July 12, 2012 (edited) my fuse on my amp power wire is only 180amps. And so this way neither battery Will be the main so can I wire the amp power wire to any batt? The batt is in the trunk in cobalts Edited July 12, 2012 by lotus Quote 2010 Cobalt LT Coupe Subs: 2 American bass XFL 12s Amp: Crescendo BC3500D Big 3 in 1/0awg 29hz box stinger volt meter 2nd battery Deka 9a31 pioneer DEH-9400BH Link to comment Share on other sites More sharing options...
HunterJohnson Posted July 12, 2012 Report Share Posted July 12, 2012 (edited) yes match the amp rating to your wire. In your case at 1500rms I'd run 125-150amp fuse. on the batteries you can use 200. then 150 to your amplifier Edited July 12, 2012 by HunterJohnson Quote Scion tC SQ BuildiPad mini, lots of fabrication, daily drivenFord Explorer C Pillar Wall Build Just a cheap car to destroy with bass Link to comment Share on other sites More sharing options...
lotus Posted July 12, 2012 Author Report Share Posted July 12, 2012 would this mess up my electrical without the big 3 done? Quote 2010 Cobalt LT Coupe Subs: 2 American bass XFL 12s Amp: Crescendo BC3500D Big 3 in 1/0awg 29hz box stinger volt meter 2nd battery Deka 9a31 pioneer DEH-9400BH Link to comment Share on other sites More sharing options...
HunterJohnson Posted July 12, 2012 Report Share Posted July 12, 2012 (edited) nope big 3 just reduces your resistance and allows more current to flow. its recommend bc you prob just have factory 4 gauge but it doesnt matter in terms of messing up Edited July 12, 2012 by HunterJohnson Quote Scion tC SQ BuildiPad mini, lots of fabrication, daily drivenFord Explorer C Pillar Wall Build Just a cheap car to destroy with bass Link to comment Share on other sites More sharing options...
lotus Posted July 12, 2012 Author Report Share Posted July 12, 2012 should I fuse the alt to batt wire Quote 2010 Cobalt LT Coupe Subs: 2 American bass XFL 12s Amp: Crescendo BC3500D Big 3 in 1/0awg 29hz box stinger volt meter 2nd battery Deka 9a31 pioneer DEH-9400BH Link to comment Share on other sites More sharing options...
HunterJohnson Posted July 13, 2012 Report Share Posted July 13, 2012 Mine is fused with a 250amp fuse Quote Scion tC SQ BuildiPad mini, lots of fabrication, daily drivenFord Explorer C Pillar Wall Build Just a cheap car to destroy with bass Link to comment Share on other sites More sharing options...
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