I've chased my tail on bad connections and shorts many times...it's frustrating. My favorite was the demon-possessed '84 S-10 Blazer that was trying to kill me. With an aftermarket head unit in place, it would blow turn signal fuses like crazy. With the stock radio in place, no problems at all. The same head unit in a Talon? Not a problem. I really hated that POS...

 

I'm not sure why you added the extra "feed" wiring....and I'm not sure if you may have created some kind of undesirable feedback loop by doing so. The standard wiring (for the alternator/s that you select) should work quite well for the amount of current each will be supplying. Running extra feed wiring or ground wiring might be counter-productive. I do not think that I would interconnect the two alternators.

 

He's running 2 alternators on the same car at the same time?How the heck did I miss that?This old age is hell.

 

No, right now he's running only one alternator (see below, from post #7). So the old age hasn't got 'ya yet!

 

Pheeeew.......Thanks........... think maybe I 'll keep my drivers license a little while longer.lol

 

Poster indicated that is how he would be wiring the second alternator into the system. I just don't think it would be a good idea to do so.

 

I did a lot of reading and research before designing the twin alternators on the 405. I used to see them a lot on cars and trucks with big stereos...mostly in GM SUVs like Suburbans and such.

The install was very easy. They needed a custom bracket to mount the extra alternator, and all the wiring just piggy backed each other. Parallel wiring.

The only part I have not been able to verify is if I will want to run a second GEN light wire or if the single one works. If I need a second one I will modify the lens in the dash to have two GEN light lenses and bulbs instead of a low fuel light, and run the two wires new with the bulbs in the dash.

The second alternator doubled very well as an A/C delete pulley.

Also, on TV a few weeks ago I saw a Suburban at a Nopi show with I think eight alternators.

It seems to work just fine if you plan, and a larger gauge wire to help shuttle the extra power into the charging system seems to be a good idea in avoiding a burned up stock wire and harness.

 

DB, the Gen light has 2 functions: It indicates a failure in the alternator and it provides current limitation for the exciter voltage. If your gonna run 2 alternators and you want real indication, run 2 lights.

 

That may be the stupidest thing I ever read. That guy is a moron.

 

Very true. That's the first thing I thought of.

 

Have to ask, what are you running that needs two alternators, and how many amps are each alternator

 

As I remember, he mentioned that one would be to run the engine electronics and ignition, and the other would be used to power the passenger seat **** movies, external nuclear warning bull horn, roadside welder and undercarriage neon light system. Right?

 

13 megawatt stereo system....

If each alternator has its own wires to ground and for 12v. output, the only possible need to increase wire size would be for the Positive cable to the + side of the battery. And since that is already sized for starting current, it seems redundant to make it any larger.

 

In use, are two modified CS130 alternators. I say modified because they are modified for cooler running. The CS130 has a reputation for overheating. I found the fix, and performed said fix on these alternators.

Each alternator puts out around 60 amps at idle, and around 100 amps at RPM. This means that at idle I will have 120 amps readily available and 200 at RPM.

I chose to do it this way so I would not have to worry about an expensive high output single alternator burning up. The high output jobs always burn up when you really put a load on them.

Instead of passenger ****, here is what I will have pulling juice.

Electronic fuel injection system.
Two auxiliary fans. (MarkVIII & Trans cooler.)
Headlight and foglight circuits.
High power stereo system.
Various other electronics.

The reasoning is this. Batteries that drain and charge often go bad faster. With 120-200 amps available, the battery will never get run down even when all of the above items are at max draw.

The battery will last a lot longer, and because I have two alternators working easy instead of one working hard the alternators will also last a long time.

Lastly, I needed an A/C delete pulley of some kind, and to be frank, that second chrome alternator looks a whole lot better than the pulley and bracket you get off of Ebay.

 

Passenger p... ??? I don't have that in my car ???

 

Did you have the counter man at autozone clock these alternators for you? ?

Hehe, just had to mess with ya. I remember the big thread on alternator clocking a while back....

 

Yeah I know. All I meant was that the alternator can only go on the bracket one way and people get all bent out of shape because the case itself can be clocked.

Sheesh.

Oh, and the guys at Autozone had nothing to do my ANY of my accessories.

 

I learned from the Jeep guys that there is a very easy way to turn an alternator into a roadside welder...