corsacman
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Registered: 30th Dec 04
Location: Glasgow
User status: Offline
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Anybody done this on the Corsa C and does it improve the electrical system by much. I get slight light dimming with bass notes, my amp has 3x40amp fuses, but under the bonnet i am using a 60 amp AGU fuse and 4 awg cable from the amp to the battery. I have upgraded the battery (-) to chassis with some 4 gauge but just need the other 2 done. Is it difficult and anybody got any guides etc on how to do them.
thanks
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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Serious problem there.
Your amp has 3x40 amp fuses, max load of 120 amps. You MUST have a 120 amp fuse at the battery, and your cutting it fine by using 4 awg wiring.
You should be using 2 or 1/0 awg wiring, and defo a bigger fuse up front. Your ground should also be bigger.
You just need to upgrade the ground from the alternator and the power lead from the alternator. No guide needed really as its as simple as getting to the alternator and adding some wires.
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corsacman
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Registered: 30th Dec 04
Location: Glasgow
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Thought it would be pretty straight forward doing the other two(never knew the alternator had a ground on the vauxhalls?). Yet again if im stuck i could always ask my vauxhall machanic friend  Surley if the current draw was exceeding the fuse rating it would blow. Therefore i cant be drawing that much current do justify the power cable upgrade to 2 gauge or 0. The amp has 4 awg input terminals as well.
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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If its not blowing a 60 amp fuse, your amp is not performing near its stated output. And the reason for 4 awg terminals is because you should run the 1/0 awg to a distribution block, then 4awg from there to the amp. The shorter the cable the more current it can deliver.
To be honest now though, thinking back through my head, 4awg can handle around 125 amps up to 18-19 feet, but there is still quite a bit of a voltage drop due to distance. I have the chart here somewhere.
You should still definatly upgrade that fuse though
[Edited on 31-12-2004 by Richie]
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corsacman
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Registered: 30th Dec 04
Location: Glasgow
User status: Offline
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Upgrading the fuse would that not only be needed if the fuse kept on blowning, due to to much current flowing throw. I thought 4 gauge was fine over that distance. You stated around 125 amps, is the current draw or the fuse size.
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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125 amps is what the cable can handle over 18-19 feet, so you are ok there.
Im just stating that you are using half the rated fuse that you should be using. Yeah it maybe safer but its best to do it all properly to start with
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