HO alternator Questions
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New member Username: P_f_tPost Number: 7 Registered: Feb-06 | How many amps would i need to run say a Kx2500.1? How involved of a project would this be? |
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Platinum Member Username: GlasswolfWisteria, Lane USA Post Number: 10927 Registered: Dec-03 | 2500 watts? (2500/12)*1.2 = current draw of amplifier. current draw of amp + peak output of stock alternator = size of H.O. alternator you want to install. |
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Silver Member Username: N2audioLawrence, Ks USA Post Number: 527 Registered: Mar-04 | Is the 1.2 supposed to account for efficiency? Why should peak stock alt current be added? |
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New member Username: P_f_tPost Number: 9 Registered: Feb-06 | i read that you have to change your "main charging wire" to a lower gauge. Sounds like only 1 wire needs to be changed, am i right? it sounds pretty easy, is it difficult? |
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Platinum Member Username: GlasswolfWisteria, Lane USA Post Number: 10943 Registered: Dec-03 | ok, in order: Opti; yes 2500 watts it'd be class D almost for sure, so 80% efficient.. 250A at peak output. you take the combined current draw of the amplifiers used, and add that to the hot rating of your stock alternator, since with many cars, the stock alternator is just enough to handle all of the OEM demands on the car (computers, AC, lights, ignition system, etc) and that's the peak amount of current you'll need to supply, to be conservative. If you know you won't be burping the system in SPL events, or running everything at full volume, you can reduce the alternator size accordingly, since every time you halve the volume level audibly from full/peak, you decrease current draw by about a factor of 10X. Lee; you'll need to change the "big 3" which is the engine to chassis ground wire, the alternator-to-battery positive line, and the battery ground line. You'll also want large gauge cable from battery + to the amplifier location where you can reduce it through a distribution block at the amp(s). the biggest effort is usually mounting/swapping the alternator itself, and shoving large gauge cable through the firewall and routing it so it's not seen. knukonceptz and some others have "flat" large power and ground cable now so it's easier to route under carpet, too. |
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New member Username: P_f_tPost Number: 10 Registered: Feb-06 | Would my local GM dealer sell HO alts. and know how to install them? |
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Platinum Member Username: GlasswolfWisteria, Lane USA Post Number: 10971 Registered: Dec-03 | no. talk to a starter and alternator shop, or someone online like www.excessiveamperage.com |
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Bronze Member Username: P_f_tPost Number: 12 Registered: Feb-06 | ok one last question  after looking around for a bit i found this one http://www.4alterstart.com/pages/store/skudetail.nhtml?profile=highoutputalterna tors&uid=10880&returnURL=http%3A//www.4alterstart.com/highoutputalternators would something like this be able to run a Kx2500.1? |
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