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Wiring, Electrical & Installation
2nd battery to fight voltage spikes help!
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<blockquote data-quote="bigpoppahump" data-source="post: 8640055" data-attributes="member: 673376"><p>So I installed a new 270 amp alt and I'm getting 17.8v spikes at the battery and 17.5 at the amps. I'm being told that the g35 bosch plat agm under the hood is not cutting it. It's my only battery and I was not planning to add any others because I don't play the system hard with the engine off.</p><p></p><p>Could I get away with using one of those cheesy caps? Do I need a large battery or can I keep this in my budget which is, right now, 180 but I can put 60-100 more into it in a week or so.</p><p></p><p>I've searched and not found much info on what I think they called "backfeed".</p><p></p><p>2004 sub forester</p><p></p><p>orion 2500.1dz (@ 2ohms till i get a 2nd sub)</p><p></p><p>sony xm-zr1252mids/highs amp</p><p></p><p>One run of 1/0 knu ofc for the orion amp</p><p></p><p>One run of 4ga CCA for the sony amp (left in from my original install that I thought I would be happy with)</p><p></p><p>Big 3/4 with excessive grounds all 1/0 knu ofc and sky high lugs</p><p></p><p>I'm starting to hate the fact that I spent more on my alt than most of my system and now have to put more money into power to make it work properly but I wanted overkill and now I'm all in //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>Any recommendations you guys can give are greatly appreciated.</p></blockquote><p></p>
[QUOTE="bigpoppahump, post: 8640055, member: 673376"] So I installed a new 270 amp alt and I'm getting 17.8v spikes at the battery and 17.5 at the amps. I'm being told that the g35 bosch plat agm under the hood is not cutting it. It's my only battery and I was not planning to add any others because I don't play the system hard with the engine off. Could I get away with using one of those cheesy caps? Do I need a large battery or can I keep this in my budget which is, right now, 180 but I can put 60-100 more into it in a week or so. I've searched and not found much info on what I think they called "backfeed". 2004 sub forester orion 2500.1dz (@ 2ohms till i get a 2nd sub) sony xm-zr1252mids/highs amp One run of 1/0 knu ofc for the orion amp One run of 4ga CCA for the sony amp (left in from my original install that I thought I would be happy with) Big 3/4 with excessive grounds all 1/0 knu ofc and sky high lugs I'm starting to hate the fact that I spent more on my alt than most of my system and now have to put more money into power to make it work properly but I wanted overkill and now I'm all in [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Any recommendations you guys can give are greatly appreciated. [/QUOTE]
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2nd battery to fight voltage spikes help!
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