SoFreshSoClean Posted August 3, 2003 Share Posted August 3, 2003 Would anybody happen to know how many amps the stock alternator puts out or how many it can spare for other aftermarket accessories such as car audio and new headlights? Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 3, 2003 Share Posted August 3, 2003 it is 80 amp is the stock power it is enough to run the car ok if you are experiancing problems replace the battery and most of the stock power wires as tehy do seem to break down and corrode also there is a new pulley for the alt on newer models to keep the lights and other accesories from dimming Quote Link to comment Share on other sites More sharing options...
amf1932 Posted August 3, 2003 Share Posted August 3, 2003 skperformance, Could you please type a little slower! I find it very difficult to understand some of your posts because of all the typos and spellings. Thank you, thank you, thank you. :chairshot: Quote Link to comment Share on other sites More sharing options...
SoFreshSoClean Posted August 4, 2003 Author Share Posted August 4, 2003 skperformance, thanks for the post. i was actually already told that replacing the alternator wires would help. I heard the stock alternator wires are only 10 gauge and i plan on replacing them with 4 gauge. Also i am thinking about gettin an optima yellow top battery so my problem will hopefully be solved. Are you saying that i should replace my pulley on the stock alternator? How could that help? Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 4, 2003 Share Posted August 4, 2003 no problem amf by replacing the pulley to a smaller one it changes its rpm's and making it spin faster so that at idle with the old pulley it is like doing 1200 rpm with the new pulley at idle just like geasr on a bike same amount of input but a greater out put of speed Quote Link to comment Share on other sites More sharing options...
SoFreshSoClean Posted August 5, 2003 Author Share Posted August 5, 2003 Thanks skperformance. Where would i be able to purchase one of these and how much more amperage would i get out of it? Quote Link to comment Share on other sites More sharing options...
amf1932 Posted August 5, 2003 Share Posted August 5, 2003 Can you explain to me why Lexus didn't put in a smaller pulley in the first place? I'm sure there must have been a balance between idling and road speeds that made them decide what RPM would be desireable at these different speeds. If you do road speeds with this smaller pulley I think it would put undue strain on the alternator bearings and other internal parts and possibly shorten it's life. If you need extra amperage I suggest you get a heavier duty alternator. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 5, 2003 Share Posted August 5, 2003 well i have no idea how or why except from initial inspection it is smaller there may be newer bearings to handle the load i think originally it was ok because it gave less drag on the engine at idle for smoothness but lexus usually doesn't do stuff for no reason the alternator can only be rewound to about 90 amps as i have tried to find out from a few places on getting it done and they all said there is very little room to fit more wiring unlike most Domestic vehicles i guess it was fine until the whole car aged and resistance came into play Quote Link to comment Share on other sites More sharing options...
amf1932 Posted August 5, 2003 Share Posted August 5, 2003 My '03 ES has a 100 amp alternator. When designing the electrical system manufacturers figure how many amps are needed when using all the accessories so it will keep the battery properly charged. This is based on the resistance of the entire system. Naturally, as a car ages the resistance will probably rise, but at this point the area that causes this rise should be checked out with an ohm meter to find out where the culprit is. Quote Link to comment Share on other sites More sharing options...
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