Hello. I have a 2003 Land Rover Discovery 2 - Trying to upgrade to a 150amp Bosch alternator upgrade AL0807N. New alternator has 4 connections on back. Battery 1, battery 2, the exciter wire post and a plug in clip connection. Old alternator has 2 connections. Battery and the exciter wire post. My battery cable would not reach the battery 1 connector so I used the battery 2 connector. I have nothing in the plug in clip connection and battery hooked to battery 2 on back of the alternator. All installed and ready to hook up fully charged battery. Will this setup work OK and be safe?
Thought I'd ask the group for an intelligent answer so I don't make a big roman candle here.

 

My question is Does it matter which connector you use 1 or 2. Also what is the plugin clip connector used for?

 

Redid some research. Bought at Amazon. One review said - ( This Bosch alternator works and fits 100% in my Land Rover Discovery 2. It is not listed to work with the 03 Disco 2 but it does. If you are going to buy a replacement alternator that isn't the Valeo, buy this one, high quality and so much cheaper. Plus I like that the Bosch engine has a Bosch alternator. ) Link - $275. before any taxes.
Found this on an Aussie site
W connects directly to the field windings and therefore puts out an AC signal related to the rpm. Some carby Falcons in the 80's used this terminal to drive a heating element for the automatic choke. This stopped the choke from opening prematurely if you switched on the ignition and waited before starting the engine. It does not need to be connected to anything. B+ (battery) and D+ (warning lamp) are the only connections you need to run an internally regulated Bosch alternator of the traditional kind. Voltage sensing is internal and requires only a good battery connection at B+. The thicker the battery cable is the more closely alternator voltage matches the battery voltage.
In the morning I will wear some rubber boots, big gloves and my shooting glasses then touch it to that giant odyssey battery and hope for the best.
If all's fine should be a great upgrade for you guys & gal's with '03's & 04's out there with extra power needs.

 

I installed a 150A alternator from a P38 (Bosch 0-123-520-022) into my '04 D2. I had the same problem, the battery cable could not reach the terminal. I was able to rotate the terminal housing by 180 degree and then the terminal bolt was close enough. I don't know if this is possible with your alternator.

 

Hello Discorama. You must of had the same rigid formed cable end as me. It was a real pita, I managed to twist it in without breaking it. If it was a 1/4" shorter would not of worked.
Other than that it was a breeze.

 

Update
Alternator works fine. Good riddance to that 120 amp alternator starving my system. Might even be able to stay with AGM batteries now, was going to give them up.
An quick and easy upgrade for any '03 '04 as they are listed for the disco 1.
Not cheap but for a new Bosch 150 amp alternator just under $300 don't seem outrageous
Alternator part link - New not rebuilt 150amp Bosch alternator AL0807N
Thanks to all for recommendations and comments.

 

Hello. Am very curious to learn what uses 150 Amperes in your activity; and at what RPM you run the engine to obtain such 2000 Watts level of generation power.

 

Hello Externet. Possibly a bit of overkill like always. My older remanufactured alternator failed test at two different parts stores since I needed a new one I figured I'd upgrade. I have been running in Odyssey 1500 extreme nearly impossible to keep charged having to put the smart charger on it a lot. Although I'm afraid I let it fall to undervolt and might have damaged it somewhat.
But I do have a really big winch up front a handful of exterior lights which I used to use often. I have a pump I use often for feeling inflatable paddle boards which draws far more power than it should.
When I get a chance my intend to replace all of my primary cables as they are probably original and pushing 195,000 mi
That big Alpine amps underneath my seat not sure how much it pulls combined with the 50 lb JVC base amp in the back.
I've been meaning to pull that JVC out of there since the day I bought it I just can't force myself to do it, but it do enhance the stereo experience. I've never noticed lights flickering driving in the rain at dark just impossible to keep the battery good in charged like it's not not enough extra juice. Big AGM batteries require at least 14 1/2 volts to get fully charged and mine has never put that out. It does now.
I'm fixing to make a battery change. will probably stick to AGM's but will run an Odyssey performance or one of the larger DieHards

 

Alternators deliver about 70% of their maximum power at engine idle rpm already. Alternators run about 2-4 times faster than the crankshaft (D2 = 3.25), so it doesn't need very high engine rpm to deliver decent amps. The power capability flattens out at normal highway driving speeds already.



I have an overlanding setup and need additional amps in order to prevent overloading of the alternator. My LiFePo battery charger delivers up to 50A. Since it needs to step-up the voltage and has efficiency losses it can draw about 60A at the alternator. Alternators have no current protection. Overloading can heat up the alternator too much, or it can even destroy the stator coil wires, diodes and other parts.

 

Be sure to pay attention to the diameter of the alternator pulley, since D1s '94 - '95 use larger pulley size compared to '96 - '99. The alternators provide a signal to the tachometer for D1s, so the tachs are calibrated accordingly (small pulley in large pulley application will show higher RPMs, maybe affect idle, default maps). Smaller pulley will provide higher amps at idle, per Discorama chart above.