any negatives with larger alternator?
This is a discussion on any negatives with larger alternator? within the External Engine forums, part of the LSx Technical Help Section category; its too common of an issue to be just some loose wires. Its said that somthing in the alt itself ...
03-10-2011, 03:11 AM #21
its too common of an issue to be just some loose wires. Its said that somthing in the alt itself is the issue. Either way it cant hurt to get some extra juice and a better built oem alt then some over priced alt that sometimes doesnt even last as long as the stock unit to begin with.
03-10-2011, 06:36 AM #22
Never heard of this being a common problem. I've had 4 4th gens and currently own 2,,,and I've never experienced it. Don't know, but I could easily see a charging issue out there since alot of these kids are installing larger stereos, high output lights, underdrive pulleys, or even a larger fuel pump with a hot wire kit that may go directly to the alternator, etc....
Then I can see an upgraded alternator is in order.
Last edited by Firebirdjones; 03-10-2011 at 06:39 AM.
03-17-2011, 09:46 PM #23
03-18-2011, 07:08 AM #24
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You can change the pulley on the alt to accommodate. As far as the stock size that comes on it, I believe it's the same as the our stock.
03-18-2011, 07:14 AM #25
But by doing that,,,you are basically only underdriving the water pump at that point, and it starts to make the underdrive pulley not all that attractive if you ask me.
03-18-2011, 07:41 AM #26
So the under drive pulley reduces parasitic loss by reducing power provided to the alternator and water pump? What about power steering? If you go with an electric water pump, is it best to just keep the stock pulley for the alternator?
03-18-2011, 09:40 AM #27
You lose parasitic drive losses with the underdrive pulley by turning everything at a slower rate. That slower rate or less revolutions per engine revolution is where you see the HP gains.
Electric water pumps will take that out of the equation entirely. It's up to you if you want to keep the stock alternator pulley or not. I would base that on whether you run aftermarket stereo equipment, high output lighting, larger fuel pumps or a booster pump/hotwire kit etc....
With an electric water pump, and a smaller alternator pulley to compensate for the slower turning underdrive pulley, the only thing you'll be underdriving at that point is the power steering pump. I'm thinking it wouldn't be worth all that trouble and money
03-19-2011, 05:50 AM #28
And depending which electric water pump you get. Some still have a pulley on them which can still cause a minor amout of drag. So the water pump isn't 100% out of the equation.
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