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  #1  
Old 08-10-2007, 08:11 PM
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Exclamation Upgrading Alternator Cable

Hey fella's


I'm tryin to work how hard/easy it is to upgrade the cable from the alternator to give my stereo/headlights more juice.

I have upgraded the battery to an Optima and added another 5 earths to car still gettin flickering headlights so my next option is to get thicker cable for the alternator

does this cable go straight to the battery ? this is what I have been told but from what I can see it goes under the Fuse box some where.

Please DONT recommend me to get a Cap for my stereo because they are B.S

Car is 99 WRX GC8
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Old 08-10-2007, 08:17 PM
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NEW ALTERNATOR,

cable is a passive item, more power requires a bigger alt.
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Old 08-10-2007, 08:32 PM
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how about upgrading the wiring from your headlights to the fuse/relay box in the engine bay? and new relays too.
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Old 08-10-2007, 08:45 PM
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Quote:
Originally Posted by slikwrx
does this cable go straight to the battery ? this is what I have been told but from what I can see it goes under the Fuse box some where.
It goes through a fusible link, and other power supplies pick up from the fuse box as well. There's no reason you can't add an additional thick cable from the post on the alternator directly to the pos battery treminal other than it not being fused. If you leave the original connected as well you won't have any other problems. I'd recomend a $200 HID kit to rectify your headlight problem.
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Old 08-10-2007, 09:13 PM
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Quote:
Originally Posted by devilfish
NEW ALTERNATOR,

cable is a passive item, more power requires a bigger alt.
that would be the last option, it would be much cheaper and easier to try a bigger power cable instead, one memember off the car audio forums has told me the difference is like day & night.
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Old 08-10-2007, 09:14 PM
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Quote:
Originally Posted by dtrally
It goes through a fusible link, and other power supplies pick up from the fuse box as well. There's no reason you can't add an additional thick cable from the post on the alternator directly to the pos battery treminal other than it not being fused. If you leave the original connected as well you won't have any other problems. I'd recomend a $200 HID kit to rectify your headlight problem.
i have a funny feeling this would cause engine whine noise into my system.

wont be goin HID after seeing this
http://www.rexnet.com.au/forum/index...howtopic=48128

Last edited by slikwrx; 08-10-2007 at 09:28 PM.
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Old 08-10-2007, 09:31 PM
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i dont see why it would cause whine? you are running another cable in parallel to the existing cable though as said the only problem is that you wont have a fuse, bad idea, but you could put a circut braker/another fusable link in place.

Anyway whine is usually caused by faulty capacitors in the alternator, or bad connections?
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Old 09-10-2007, 06:17 AM
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thicker cabling from the alternator wont fix the problem, you are kidding yourself to think it will.

turn the stereo down and accept the fact that your amperage draw is exceeding the battery supply. two problems- poor choice of battery and stock low amp alternator.

have you done the basics? checked the amperage draw on peak load? checked the CCA capacity of your battery? checked the wire guage feeding the positive and negative circuits from your battery? checked the voltage drop? tested your alternator? checked your belts? earthed the amplifer? checked the bulb wattage?
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Old 09-10-2007, 07:22 AM
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Don't disregard the benefits of HID lights without actually seeing the difference for yourself. I have them in a 98 WRX and an RS Liberty, neither of them exhibit that flaring that thread refers to. I suspect they were deliberately installed with the focal point of the globe too far back. ie; it's easy to reproduce those results if you wanted to. They do not require projector type reflector either.
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Old 09-10-2007, 07:45 AM
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Upgrading the cable will do squat. A simple analogy, think of a pipe with water running in it. No matter how big you make the pipe you cannot increase the amount of water in the pipe without increasing the supply of water. Same principle in electrics.

Do the simple checks as per Tuna's recommendations above.
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