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  #1  
Old March 24th, 2020, 15:17
Thatguy1 Thatguy1 is offline
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Alternator upgrade?

On the fence about upgrading my alt to a 130A but the stock puts out 117-120 depending on what one you buy.
My build donít include a winch or a lot of lights but definitely going to upgrade the wiring. Rig will mostly be a pavement pounder and weekend camper. I guess my question is will going bigger be better?


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  #2  
Old March 24th, 2020, 15:45
denverd1 denverd1 is offline
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Re: Alternator upgrade?

sounds like a negligible upgrade you won't be using.

If you may add a second battery to run a fridge or winch down the road, then get all you can.
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  #3  
Old March 24th, 2020, 17:37
bajabronco bajabronco is offline
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Re: Alternator upgrade?

If you are going to spend the time to upgrade your alt, you should look into the 160A Dodge Durango Alt upgrade. It takes a little more work, but you get a higher output alt. I swapped in a 160A alternator out of a 2002 5.9L Dodge Durango in my 2000 XJ. Grinding of the stock bracket is needed, opening up the positive lead wire to fit the bigger stud, and I used the XJ pulley. The XJ pulley is slightly smaller=more output at lower RPMís. Other than that it is plug and play! I did the swap the hard way, leaving the bracket on the truck, fitting, grinding, over and over. I t would be MUCH easier to just pull the bracket off and bench fit it.
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  #4  
Old March 24th, 2020, 20:35
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4x4JeePmaNthINg 4x4JeePmaNthINg is offline
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Re: Alternator upgrade?

better, meh. I went 136 once my other alt took a nap. I already upgraded wiring before this to, however ive added a breaker.

I wouldnt call it better, but it may be easier on the system when or if your need to draw some serious amperage ie winching.

136/160 is all the same for what has to be done really. I think another way of looking at things when building them up is, are they how they should be. If you upgrade, you do it right to fit the application of the upgrade. Is it better, maybe, but if its done right, its how its supposed to be. Kinda like it left the factory that way. Build it to compliment your vehicles purposes.
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  #5  
Old March 25th, 2020, 04:32
Thatguy1 Thatguy1 is offline
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Alternator upgrade?

Iím definitely relocating to the top. I hacked off the mechanical fan bits and just waiting on the adapter to show up


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  #6  
Old March 25th, 2020, 07:08
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4x4JeePmaNthINg 4x4JeePmaNthINg is offline
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Re: Alternator upgrade?

hell go 160, you dont even have to grind lol
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  #7  
Old March 25th, 2020, 07:31
denverd1 denverd1 is offline
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Re: Alternator upgrade?

top mounted alt. I like it. gets it up out of the water/mud

was going to mention you can't fit one much bigger than stock in current location...
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  #8  
Old March 25th, 2020, 10:09
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BigNuge BigNuge is offline
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Alternator upgrade?

I went high mount on mine, so much better access, and itís up out of the shit zone...




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  #9  
Old March 25th, 2020, 16:58
Thatguy1 Thatguy1 is offline
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Alternator upgrade?

Yep my ac was trash and I said why not. So for now Iíll be running a high mount stock alt until the need for a bigger one. Thanks guys your so helpful.


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  #10  
Old March 25th, 2020, 17:22
RCP Phx RCP Phx is offline
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Re: Alternator upgrade?

Just remember those "amps" cost you "HP" plain and simple!
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  #11  
Old March 25th, 2020, 18:46
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4x4JeePmaNthINg 4x4JeePmaNthINg is offline
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Re: Alternator upgrade?

Quote:
Originally Posted by RCP Phx View Post
Just remember those "amps" cost you "HP" plain and simple!

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Old March 25th, 2020, 18:57
RCP Phx RCP Phx is offline
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Re: Alternator upgrade?

Quote:
Originally Posted by 4x4JeePmaNthINg View Post
It's the same thing as people report about using a ZJ fan clutch, more electrical output requires more HP input.
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  #13  
Old March 25th, 2020, 20:08
RCP Phx RCP Phx is offline
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Re: Alternator upgrade?

I found this, it sounds fairly accurate..... https://alternatorparts.com/how-much...ator-make.html
Then subtract for your water pump, power steering, mechanical fan, and don't forget AC.
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  #14  
Old March 26th, 2020, 17:17
Thatguy1 Thatguy1 is offline
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Alternator upgrade?

So you need 32hp to make 130amps?


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  #15  
Old March 26th, 2020, 17:24
RCP Phx RCP Phx is offline
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Re: Alternator upgrade?

Quote:
Originally Posted by Thatguy1 View Post
So you need 32hp to make 130amps?


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Evidently you not very good at math.
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