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Old 01-24-2010, 01:00 PM
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anderkart anderkart is offline
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Delco 12si alternators like the one pictured above usualy have a max output rating somewhere between 65 to 100+ amps and usualy require 3 to 5hp. from your engines avalible power to spin them up to full output. For an installation on the average 6.5 hp powered go kart, selecting an alternator with a much lower max power rating (like a 20 or 30-amp model) would probably be a good idea so the engine would have some power left over to still drive the kart... These lower output alternators would also come with the added benefit of requiring lower belt tension levels that would put less strain on your cranks support bearings/bushings.