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<blockquote data-quote="ABV9750" data-source="post: 1502323" data-attributes="member: 9375"><p>ok sufi,..(sori wrong name b4),</p><p>all alternator must have a built in ic regulator.this is to cut of excessive voltage and start up charging when its goes down.</p><p>normally, the charge range is about 13V - 14V.when you install new alternator, try measure the voltage.battery voltage is 12.6V. when engine start, the voltage increase to 13.6-14V..this is good.then apply load one by one by a/c ON,what is your reading?normally its reduce 0.1V.ON headlight, another 0.1V drop.ON radio,power amp and all the electrical device, the voltage drop 0.1V.</p><p>total left is around 13.3V..</p><p>BUT the ic regulator then try to charge up a little bit to maintain 13.5V -14V.</p><p>this is a healthier alternator.</p><p>if you got less, better refuse</p><p></p><p>bigger amp, means they drain slower vs your apply load. but they also need extra charging time. if your ic regulator kapoot, this is very dangerous since it might kill your sensor that run 16Volt.</p><p></p><p>*some case of ic regulator cut off at 14.4V and remain..but using 50A, during maximum load, the voltage will drop till 13Volt.. that's why higher Amp is better..it drop a little bit.</p><p></p><p>using 70A is better option since our wiring is old..we use NS60 battery..most of the time using maximum load...full a/c..</p><p></p><p>i buy at recond shop that cost me rm150 with 3 month warranty and its running fine till now.almost 4 years..what a worth it paying the price.</p></blockquote><p></p>
[QUOTE="ABV9750, post: 1502323, member: 9375"] ok sufi,..(sori wrong name b4), all alternator must have a built in ic regulator.this is to cut of excessive voltage and start up charging when its goes down. normally, the charge range is about 13V - 14V.when you install new alternator, try measure the voltage.battery voltage is 12.6V. when engine start, the voltage increase to 13.6-14V..this is good.then apply load one by one by a/c ON,what is your reading?normally its reduce 0.1V.ON headlight, another 0.1V drop.ON radio,power amp and all the electrical device, the voltage drop 0.1V. total left is around 13.3V.. BUT the ic regulator then try to charge up a little bit to maintain 13.5V -14V. this is a healthier alternator. if you got less, better refuse bigger amp, means they drain slower vs your apply load. but they also need extra charging time. if your ic regulator kapoot, this is very dangerous since it might kill your sensor that run 16Volt. *some case of ic regulator cut off at 14.4V and remain..but using 50A, during maximum load, the voltage will drop till 13Volt.. that's why higher Amp is better..it drop a little bit. using 70A is better option since our wiring is old..we use NS60 battery..most of the time using maximum load...full a/c.. i buy at recond shop that cost me rm150 with 3 month warranty and its running fine till now.almost 4 years..what a worth it paying the price. [/QUOTE]
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