Help!!! Doing Big 3, need to know what size alternator?
06-20-2010, 03:50 AM
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Help!!! Doing Big 3, need to know what size alternator? How many amps would I need out of an alternator to get it to run this
300 shot of nitrous (working fine on stock, see sig)
Yet to be installed, but soon...
2 amps rated at 600 watts RMS @ 12v, not at the BS 13.8 - 1200 RMS total.
HIDs from DDM, undecided on size, probably 35. 55 seems too bright to be safe 4 HIDs in total, two for lows and 2 for fogs. Obviously the amps won't be running at the same time as the N20, but the HIDs probably will.Other than a few fuel system upgrades, the car isn't pulling any more power than those three: the N20, the 1200 RMS amps and the 4 HIDs.
So...
What amp alternator should I use?
300 shot of nitrous (working fine on stock, see sig)
Yet to be installed, but soon...
2 amps rated at 600 watts RMS @ 12v, not at the BS 13.8 - 1200 RMS total.
HIDs from DDM, undecided on size, probably 35. 55 seems too bright to be safe 4 HIDs in total, two for lows and 2 for fogs. Obviously the amps won't be running at the same time as the N20, but the HIDs probably will.Other than a few fuel system upgrades, the car isn't pulling any more power than those three: the N20, the 1200 RMS amps and the 4 HIDs.
So...
What amp alternator should I use?
06-20-2010, 12:18 PM
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People do the Big 3 before they purchase a higher amp alternator to see if it helps with voltage drops. I'm running 850 rms and hids and did the Big 3 in 1/0 gauge wire, no voltage drops. Do the big three and see if it helps, if it doesnt then you should buy a higher amp alternator.
Last edited by 94'BLKBRD; 06-20-2010 at 12:24 PM.
06-20-2010, 12:26 PM
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there is a massive price difference between the 180 and 200. Should I need the alternator after the Big 3, would I be better off just ponying up the extra for the 200, or will the 180 be similar?
06-20-2010, 01:30 PM
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Like I said, alot of people do the Big 3 and are fine with it. Do that first and monitor your voltage for drops.
If you want/need a higher amp alternator you should be fine with a 180
If you want/need a higher amp alternator you should be fine with a 180
06-20-2010, 05:03 PM
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I had the 180amp with more power then that and the big three. Never had an issue with needing more amperage then that. Also had a Bosche premium battery to round things out that was VERY good. Same specs as a yellow top Optima battery. Between all of those upgrades I never had issue with needing more.
06-20-2010, 06:14 PM
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I am going to hijack my own thread. It looks like I've got some pretty smart guys in here. Hopefully one of you will be able to answer this. I am running an underdrive pulley on the engine. I have the pulley to overdrive the alternator to bring it back to stock (and the belts, actually 4 belts - at 1.49 each on amazon, I got a little carried away!)
So...
HOW THE HOW THE HELL DO I SWAP THE PULLEY!?
So...
HOW THE HOW THE HELL DO I SWAP THE PULLEY!?
