Alternators (OEM & High Output)

[K6UK]

Now that I am toying with the idea of installing dual batteries, does anyone know what the stock Alternator output is on the 4Runner V8? Also has anyone researched upgrading to a real high output unit?

I know there are some great solution for domestic vehicles, but I'm not sure about our Toyotas. I'll look around in the meantime.

-Mike

[bulldog]

All I could find was in the FSM and it stated 100A unit. I was hoping for 130A or so, but to be honest 100A is plenty. Dual batteries do not add that much load to your charging system, unless you constantly drain the second battery with short periods of engine running in between.

I have not seriously looked at high output units for the 4R V8. One thing is to make sure it is a unit that can take some beating and water given the location.

[K6UK]

I found this alternator for the Landcruiser - will this work on the 4Runner?
If not they may make a model that will:

http://www.man-a-fre.com/pa/pictures/MG1379.jpg

From the site:

"200 amp output! This is the ultimate alternator for your 100 series 2UZ, V-8 equipped Land Cruiser! Uses O.E. mounts and attaches
directly to O.E. wiring. Features include: Tool steel motor shaft, supported at both ends by heavy duty, double sealed bearings.
Integrated, heat resistant, multi-function regulator. Solid copper windings sealed with hi-temp insulation. Two year unconditional
guarantee."

Here's the site links:
http://www.man-a-fre.com/pa/meangreen100seriesalternator.htm
http://www.mean-green.com/products/alternator.html

[bulldog]

Looks impressive. I see no reason why It wont fit as the engine is the same. Maybe give them a call and ask. See if they will allow you to return it if there is an issue.

[K6UK]

Yes, I'll make a call next week to find out.

In other news, for the more adventurous here's a link on adapting a GM High Output - single or double rectified - alternator to Toyota Vehicles. They have 140, 170, 200 & 250 Amp versions.

http://www.alternatorparts.com/Toyota_highoutput_alternators.htm
http://www.alternatorparts.com/CS1443-1.JPG

I have also contacted Ohio Generator to see if they have a product that will work for us.

-Mike

[Photog]

I am kicking an old thread back to life.:deadhorse

Was there any conclusion to this?

Is the Landcruiser alternator a direct fit?

[bjowett]

I would think the 130 amp unit from the 4.7L Tundra would bolt right on. The 5.7 runs a 150 amp unit, also likely to bolt on.

[bulldog]

I would think the 130 amp unit from the 4.7L Tundra would bolt right on. The 5.7 runs a 150 amp unit, also likely to bolt on.

I looked further and it seems the 4Runner (V8 at least have a 130A unit). So I don't know if it is worth it to get a different unit for 20A more.

http://www.toyota120.com/forum/showthread.php?t=666&highlight=altenator+output

[Teampez]

ok Im usin the search, lol.... has anyone replaced the stock Alt. ??? how much of a pain use it to get to ? Im gonna have to extend my battery to Alt. wire BEFORE I do a bodylift, so Im looking for some tips :drink:
any help, tips, or tricks would be appreciated

[bulldog]

My OEM seems to be running good still (touch wood), not looking at replacing it just yet. The alternator on the V8 seems to sit in a very bad position, and will likely be a PITA to replace.

Not sure why you need to lengthen the wire for a bodylift, mine has been fine for some time now, with the OEM wire.

[Teampez]

I was afraid of that, but yes, for some reason, my wires are extreamly tight now, I do have the Yellow top, but its tight, I do not have an 1.5" of play, so if Im going to have to lenghten :mecry:
someone happen to have a pic of it on the V8 ?

[Yabedude]

I was afraid of that, but yes, for some reason, my wires are extreamly tight now, I do have the Yellow top, but its tight, I do not have an 1.5" of play, so if Im going to have to lenghten :mecry:
someone happen to have a pic of it on the V8 ?

Not sure what picture you're looking for, the alternator or a longer wire, but here's the alternator:
http://www.toyota120.com/forum/showthread.php?t=2557

If I remember, I'll take some pics of my battery cable mods tomorrow.

[Teampez]

Not sure what picture you're looking for, the alternator or a longer wire, but here's the alternator:
http://www.toyota120.com/forum/showthread.php?t=2557

If I remember, I'll take some pics of my battery cable mods tomorrow.

thankx soo much, Id really appreciate the pics... I need to extend my wires, before I do the BL

[Yabedude]

I may have inadvertently mislead you a bit. I also have a 1.5" lift, but my battery setup isn't normal in that I have a dual battery setup using a Painless solenoid and so I had to change the OEM wiring slightly. My setup is also tight, but the main 'short cable syndrome' was with the ground wire. Below, I explain how I addressed that issue. It's not the cleanest setup, and one day I'll redo it now that electrical mods are finished.

http://i237.photobucket.com/albums/ff1/yabedude/Dual%20Battery%20Setup/DualBatterySolenoid_PainlessBattery.jpg

http://i237.photobucket.com/albums/ff1/yabedude/Dual%20Battery%20Setup/DSC02340.jpg

I took the OEM main (+) lead coming from the alternator and routed it to the solenoid. The power going to the fuse box remained intact, just the original (+) cable was moved from the battery to the solenoid. From the solenoid, I added another (+) positive cable back to the battery (+) post.

Then, I took the OEM (-) ground wire and hacked off the the end, leaving a brass circle that then got attached the the (+) side of the battery. This meant that I lost the OEM grounding bracket that was attached to the top of the wheel well. I simply made a new short ground cable to replace that one. The ground coming up from the alternator to the battery is a bit tight, but I still have play if I wanted to shuffle things around a bit more.

http://i237.photobucket.com/albums/ff1/yabedude/Dual%20Battery%20Setup/DSC02344.jpg

http://i237.photobucket.com/albums/ff1/yabedude/Dual%20Battery%20Setup/DSC02342.jpg

HTH.

Other cables in the pictures are IPF 900 lamps, IPF fogs, Lightforce lamps, extra horn, winch power, aux power for amps and other radio equipment.

A few more pictures are in Photobucket: http://s237.photobucket.com/albums/ff1/yabedude/Dual%20Battery%20Setup