Re: Supply/demand. Do I have enough amperage? - Saab Performance Bulletin Board - Saabnet.com
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Re: Supply/demand. Do I have enough amperage?
Posted by Chad B [Email] (more from Chad B) on Fri, 7 Mar 2003 08:00:39
In Reply to: Supply/demand. Do I have enough amperage?, Jordan, Fri, 7 Mar 2003 02:46:35
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I believe the current from the alternator is dependant on the draw from the system, not rpm. So low rpm with 570 watts of headlights will probably be a lot harder on your alternator than spinning up to higher rpms, as far as current goes. I might be a little worried about the bearings though, I'm not sure what a standard alternator bearing is made to hold up to.
You said you were confused on current, here's an equation for ya
Power(watts) = Voltage * Current(amps)
or Current=power/voltage so your headlights alone will be pulling 47.5 amps @ 12v. I hope that 1800 watts is peak and not RMS power or you'll need that 150 amp alternator just for your amps.
How is the car coming, I haven't heard an update in a while? Do you have a web site going?
posted by 192.55.2...
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