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Originally posted by corsacman
Dom, this is the reply from "black-cat" about the above you stated. He is an physics wizard.

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Utter bull$hite! Cable is only rated in watts on cheap wiring kits.

Bigger = less resistance, use the biggest you can.

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Dom, this is the reply from "black-cat" about the above you stated. He is an physics wizard.

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Utter bull$hite! Cable is only rated in watts on cheap wiring kits.

Bigger = less resistance, use the biggest you can.

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As for power cable, you are correct that bigger the cable the harder to route. However, it not always wise to use the biggest cable you can afford, as if you think about it - If the cable is too thick for the current being drawn, the electrons have so many different paths within the wire to take that overall power is reduced (been reading up about it ). Therefore you need to select the correct cable gauge for your setup, hence why ICE power cable is rated in watts rather than current load. Obviously you can get away using huge power cables if you use a split charging system because, as you rightly said, the length of the cable will be too short for any major voltage drop

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Originally posted by corsacman

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i would use 1/0 on the 3 wire changes underneath the hood

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Thats an overkill. As the lenght of the cables are small the voltage drop over them is minimal. As for the main power feed being to big, thats nosense. The bigger the better, only thing is 0 awg can be hard to route and get through the bulkhead without drilling a hole in many vechiles.

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i would use 1/0 on the 3 wire changes underneath the hood

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Originally posted by corsacman
First thing is do upgrade the front battery to the best one you can afford and will fit. Then upgrade the 3 wires under the bonnet to either 4 or 2 gauge. Make sure the cable that is supplying powering to your amps is adaqute to carry the current without to much of a voltage drop. If i was you i would use either 0 or 2 gauge to a distribution block then two small 4 gauge runs to each amp. After all this measure the voltage accross both amp terminals, and if its low then upgrade the ALT. Vauxhall do ones that are 100 AMPs that will be fine but for your system i think you will be fine to be honest.

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ledgend :thumbs:

First thing is do upgrade the front battery to the best one you can afford and will fit. Then upgrade the 3 wires under the bonnet to either 4 or 2 gauge. Make sure the cable that is supplying powering to your amps is adaqute to carry the current without to much of a voltage drop. If i was you i would use either 0 or 2 gauge to a distribution block then two small 4 gauge runs to each amp. After all this measure the voltage accross both amp terminals, and if its low then upgrade the ALT. Vauxhall do ones that are 100 AMPs that will be fine but for your system i think you will be fine to be honest.

for an alternator upgrade, should i just get one off a diesel corsa, or should i go hunting for a non vauxhall part that perhaps produces more amps?

Like Dom and corsacman have said, with big power systems (anything over 500wRMS imo) then you will be looking at an alternator upgrade. If your not bothered about getting the full power out of your system, or bothered about dimming lights, then just do it how you want.

Either do it right and cream your pants with the result or skimp on muchos corners and sufferrrrr

You might and probably want need an alternator upgrade. I know people who run 4Kw (rms) through there stock charging systems. 100 Amp alt for the Cosra is around £90.

dont see many corsa c's up scrappies thou mate. a trip to motorbodies is on the cards, great fun... cheerz for ya help mate, should help me sort my life out :thumbs:

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Originally posted by Aztec_sxi
Reply to DOM:

1) corsa_x_15 said about a power cap :boggle:

2) corsa_x_15 told me about a too bigger battery will fry everything in my car.

3)my mistake, i have 8 gauge running to that amp, not 16, my mbad.


surely though theres no need on spendin loads money on an alternator from say the diesel SXi, cant i just whack a bigger battery in? cause (here he is) corsa_x_15 has a mega loud system [unsure on exact figures lol] n all he has done is whack in a larger battery, uprated negative to chasis on battery, n 2 farad power cap?

holla back
:thumbs:

[Edited on 03-01-2005 by Aztec_sxi]

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Reply to DOM:

1) corsa_x_15 said about a power cap :boggle:

2) corsa_x_15 told me about a too bigger battery will fry everything in my car.

3)my mistake, i have 8 gauge running to that amp, not 16, my mbad.


surely though theres no need on spendin loads money on an alternator from say the diesel SXi, cant i just whack a bigger battery in? cause (here he is) corsa_x_15 has a mega loud system [unsure on exact figures lol] n all he has done is whack in a larger battery, uprated negative to chasis on battery, n 2 farad power cap?

holla back
:thumbs:

[Edited on 03-01-2005 by Aztec_sxi]

hmm i see a crispy new year coming for that car :lol:

A) who the fuck told you anything about caps
B) who the hell said that a big battery will fry your resistors :lol:
and C) who ever told you to use speaker cable for powering your amps, should be shot...although it might be quite cool if you car caught fire :lol:

First question, well sod the cap it wont do anything useful if your battery and alternator isnt supply the power, so i would either get a diesel corsa battery from halfords or go for something alot better and get a optima yellow :) On top of that, whilst you under the hood, replace the wire running from your battery to the chassis (ground), battery to alternator and chassis (ground) to alternator :)

If your still suffering from dimming lights or anything, then you NEED to replace your alternator for something better. Its the ONLY solution that works properly!! So you can get one out of a biggered engined corsa and wack that it....i believe the 1.6 corsa's had a 80-90Ah alternator which is alright (obviously make sure its better than what you've already got etc) :) If it still dims after that, then you will need to get a bigger alternator again....and it will have to be a custom jobby or a re-wound alternator.

Only when you have SORTED out the power and its alright, pop a cap in, just smooth it all off and take some of the strain away from the battery :)


As for your power cables, i would run 4 gauge (should be fine, although you might wanna go for 2 gauge just to make sure) from the battery into a dizzy block (fused if pos) and then 8/4 gauge from the dizzy block to both your amps :) 16 gauge cable is SPEAKER WIRE !!! NOT POWER CABLE !!


As for your 6x9s, it seems that you have sense and to use them properly and get them boxed and running on a HPF filter :thumbs:

have fun mate :)

16 Gauge is far to fine to carry current to your amp to the battery. What you want to do is run 0 awg to a distribution block and two short 4 gauge runs to the amps. This way you will get minimal voltage drop. Look at www.cablesexpress.co.uk for cheap cable. £6.50 p/m for 0 awg :D Buy around 4 Meters for power and earth and about 2/3 meters of 4 gauge.

[Edited on 03-01-2005 by corsacman]

i've already got the 6x9's though mate :|
i got them a long time before i got my sub.
they are running at HPF only playing high frequencies, and they are boxed so sub wont interfere with the 6x9 woofer cone.

atm, ive got 4gauge running from battery to X6 amp, and 16 gauge wire running from battery to small 6x9 amp. is this not good enough then...?

:boggle:

You will not need a Cap, there useless, same goes to 6x9's. They will drag the sound stage backwards and intefere with the subwoofer. Have you got any front speakers?? If not invest in components and get a nice amp to power them. As for electrical upgrades to your system, make sure you are running 0 awg to a dissy block then some 4 gauge to your amps. Upgrade the wires under the bonnet, such as the Alternator (+) to battery (+)Engine Block to chassis and battery (-) to chassis with 4 gauge or 2 gauge wire. Then if you are still getting voltage problems invest in a new battery, maybe one from a Corsa Diesel (if it fits) or go to Halfords and get one of there Heavy Duty batteries for the Corsa.

going to have an rockford x6 amp.

1221watt max 750rms,
-powering-
pioneer TS-W121SPL 750rms 2000peak,

will i need a bigger battery or can i get away with a 1 farad powercap?

IF i need a bigger battery, whats the bigggest i can put in without blowing everything? coz i heard resistors will all melt if i put in too bigger battery?

(oh, i got a directed 2400 2 channel amp powering 6x9s, not powerful really, but dunno if it'll make a difference :|)


:thumbs:
holla!!