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Unread 12-18-2015, 02:28 PM   #1
Avnmech82
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1995 YJ Wrangler 
 
Join Date: Nov 2015
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alternator

Hello all, working towards a second battery under the hood and a larger alternator to support a winch and a few more lights....I Believe stock is a 70 amp...any suggestions? or am I overdoing things to go with a second battery?

thanks in advance!

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Unread 12-18-2015, 02:48 PM   #2
Reno72
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I would definitely go with a bigger alternator. I did the GC 136 amp from Dirtkar's write up. Here is a link to mine and also Dirtkar's. I don't know how it works with your year 2.5 but it will give you some ideas
http://www.jeepforum.com/forum/f12/n...nator-3518402/
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Unread 12-18-2015, 03:29 PM   #3
blitz134
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This is my perspective...

An extra battery has its benefits but isn't a necessity for a winch and extra lights. The battery only provides power for when the engine isnt running or your alternator can't keep up, such as winching. When you add extra lights, the battery isn't really powering those lights, the alternator is. So I would start with a larger alternator first. Which will also help with winching by reducing the load on the battery some. You should winch while reving the engine if you can for the same reason.

A second battery for winching is nice since it would increase your battery life if winching often and likely not starve the winch of power. But if you don't winch much or when you do it is only for a short duration, then two batteries don't add much IMO.

If you want the second battery because you are in remote places often without someone to jump you, or run accessories without the engine on often, or truly plan to winch often and heavily, then it starts to make sense.
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Unread 12-18-2015, 04:21 PM   #4
gotswap
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When I look at the GC alternator it is externally regulated vs internal for the YJ. How is it controlled?
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Unread 12-18-2015, 07:16 PM   #5
dancytron
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Quote:
Originally Posted by gotswap View Post
When I look at the GC alternator it is externally regulated vs internal for the YJ. How is it controlled?
The GC alternator is for 1991 and later. It is controlled from the ECM.

You want an internally regulated Chevy type alternator, like a CS-130 or CS-144. Seach, there are lots of writeups on it.
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Unread 12-18-2015, 07:33 PM   #6
stevehoj
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I was sort of the same place. Tried smaller alt pulley, upgraded a few std alternators multiple times,........even started going down a path of having two alternators and two batteries. Seperated systems but able to be swapped.

Ended up just getting one of these;

http://www.qualitypowerauto.com/item...-6.6-Mount.htm

Pricey, but for my needs, it worked well.
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Unread 12-19-2015, 01:11 PM   #7
Mr.B
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Quote:
Originally Posted by Avnmech82 View Post
Hello all, working towards a second battery under the hood and a larger alternator to support a winch and a few more lights....I Believe stock is a 70 amp...any suggestions? or am I overdoing things to go with a second battery?

thanks in advance!
I'd follow Dirtkar's write up. It will work on your 2.5L. That's what I have on mine.

I would also get a hand throttle, with a bicycle shifter. That way you can rev the engine while winching outside the Jeep.








Quote:
Originally Posted by stevehoj View Post
I was sort of the same place. Tried smaller alt pulley, upgraded a few std alternators multiple times,........even started going down a path of having two alternators and two batteries. Seperated systems but able to be swapped.

Ended up just getting one of these;

http://www.qualitypowerauto.com/item...-6.6-Mount.htm

Pricey, but for my needs, it worked well.

Just for clarification, that won't work on the OP's '95.
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Unread 12-21-2015, 01:32 PM   #8
pasinbuy
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Quote:
Originally Posted by blitz134 View Post
This is my perspective...

An extra battery has its benefits but isn't a necessity for a winch and extra lights. The battery only provides power for when the engine isnt running or your alternator can't keep up, such as winching. When you add extra lights, the battery isn't really powering those lights, the alternator is. So I would start with a larger alternator first. Which will also help with winching by reducing the load on the battery some. You should winch while reving the engine if you can for the same reason.

A second battery for winching is nice since it would increase your battery life if winching often and likely not starve the winch of power. But if you don't winch much or when you do it is only for a short duration, then two batteries don't add much IMO.

If you want the second battery because you are in remote places often without someone to jump you, or run accessories without the engine on often, or truly plan to winch often and heavily, then it starts to make sense.

You are mostly right although a alternator cannot power a winch in use. The extra battery is pretty much a must have. The alternator will power up the batteries after the winch job in time.

Batteries power the winch, the alternator powers the battery.
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Unread 12-21-2015, 01:48 PM   #9
Mike Romain
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I use one of my Jeeps daily around our woodlot pulling trees out of the woods for firewood mostly, using my warn winch. I do far more pulls sometimes than on any off road run. I seldom have low battery issues, but I do have to watch it because of the short running times.
That said I run one spiral cell battery and the stock AC Delco 65A alternator. Been doing this for the last 5 years. For ten before that we did a lot of night time winter runs when the snow was cold and hard which meant heater fan on high, lights on, plus 2, 100W Hella black magic lights and the only one with a winch half the time. Sometimes having to winch 5 or 6 up a hill to continue on. Again, never a problem.
I do have a manual fast idle also to keep the alternator putting out good.
Just food for thought for you.
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