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Miscellaneous Automotive
Car Performance & Repair
Suggestions for reducing vd
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<blockquote data-quote="2023 LTZ" data-source="post: 8822025" data-attributes="member: 686684"><p>I’ve been experiencing what I’ll call voltage drop. I have 0ga from the alternator to battery then from battery to a 150a fuse then the same 0ga back to an inline fuse of 100 and 200 for a fosgate t400 and t1500. The door components are focal and take 75w some hertz tweets and 6x9 focals take maybe 90-100w and kept the oe 3.5” bose on back deck. This is in an impala limited v6. I’ve had several new interstate batteries replaced on warranty bc it seems my car kills them. I have a 240 alternator and a substantial ground in the trunk of 0ga to the chassis behind the backseat. It is sanded to bare metal and bolted, 0ga from alternator to battery and oe ground from battery to chassis behind headlight which was 4 aught but since reduced to 4ga. The charge system has a sensor of sorts on the negative wire that goes to to battery. This is from alternator to battery. I believe having that 4 aught or 0000ga allowed too much ground that was undetected by this sensor thing which caused over charging. Changing back to 4ga and the original design of 0ga seemed to correct this. I’m able to play heavy bass stuff that while driving will drop voltage to the 11s or 12.1 but briefly. It usually hangs at 13.8-14 or so. </p><p></p><p>I have something called maestro which has cool features one of which is a voltometer which I consider very helpful.</p><p>A previous and very similar setup but a bit less power hungry seemed to do the same thing. Sitting w vehicle running I played some tunes for a friend and fried a cell in the interstate agm group 34. Those guys won’t honor anymore warranty returns.</p><p>Is it possible this system is killing these batteries and is it also possible the alternator or alternators in general aren’t capable of keeping up w the varying demands of a high output setup such as this? Am I missing something obvious?</p><p>Any questions welcomed.</p></blockquote><p></p>
[QUOTE="2023 LTZ, post: 8822025, member: 686684"] I’ve been experiencing what I’ll call voltage drop. I have 0ga from the alternator to battery then from battery to a 150a fuse then the same 0ga back to an inline fuse of 100 and 200 for a fosgate t400 and t1500. The door components are focal and take 75w some hertz tweets and 6x9 focals take maybe 90-100w and kept the oe 3.5” bose on back deck. This is in an impala limited v6. I’ve had several new interstate batteries replaced on warranty bc it seems my car kills them. I have a 240 alternator and a substantial ground in the trunk of 0ga to the chassis behind the backseat. It is sanded to bare metal and bolted, 0ga from alternator to battery and oe ground from battery to chassis behind headlight which was 4 aught but since reduced to 4ga. The charge system has a sensor of sorts on the negative wire that goes to to battery. This is from alternator to battery. I believe having that 4 aught or 0000ga allowed too much ground that was undetected by this sensor thing which caused over charging. Changing back to 4ga and the original design of 0ga seemed to correct this. I’m able to play heavy bass stuff that while driving will drop voltage to the 11s or 12.1 but briefly. It usually hangs at 13.8-14 or so. I have something called maestro which has cool features one of which is a voltometer which I consider very helpful. A previous and very similar setup but a bit less power hungry seemed to do the same thing. Sitting w vehicle running I played some tunes for a friend and fried a cell in the interstate agm group 34. Those guys won’t honor anymore warranty returns. Is it possible this system is killing these batteries and is it also possible the alternator or alternators in general aren’t capable of keeping up w the varying demands of a high output setup such as this? Am I missing something obvious? Any questions welcomed. [/QUOTE]
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Suggestions for reducing vd
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