The stock 3G pulley was doing a fine job charging the car. In my case I wanted it becasuse of my Mark Viii fan and sitting it traffic (high loads @ idle)
Nice writeup srothfuss!srothfuss said:Also, to complete the swap I followed all of the information posted up by JRichker (Technical data) and 04sleeper (FFI overdriven pulley and harness)
JRichker's Post: Click me!
04sleeper's Post: Click this one!
For your pulley it depends on what size your crank pulley is. If you have a stock crank pulley then use the stock 3G. If you have an underdrive crank pulley then go with an overdrive pulley like the one from FFI. The stock 2G will not fit properly without a spacer as stated.biglg said:Thanks guys. I picked up a 3G alternator off a newer Mustang for $50. I have read contradicting information on this next topic. Do I use my stock 2g alternator pulley, or leave the pulley that is on the 3g alternator I just purchased used? I am sure i will have more questions, but that is it for now.
Oh no, not really. I am going to use 4gauge and rewire. Can anyone give me a part number for this fusable link that I need? Like from autozone, advance auto parts, radio shack, lowes? I would like to make sure I get the correct fuse for this. Or just tell me what sytle fuse and holder, and exactly where I want to put the fusable link. Thanks.
04sleeper said:Glad to see I could help.
150 Amp fuse would be the correct size for the 130 amp alt.srothfuss said:Big, I am using a 150Amp ANL fuse on my setup. 200 is probably too big, but that is just my opinion and not fact. 125 is too small though especially since the fuse would be under the rated capacity of the 130amp alt
biglg said:Thanks for the reply. Need a little help for my 3G alt upgrade.
I guess to keep it simple for my rookie a**. If I use 4 gauge from the alternator stud, directly to the battery do I need to do anything to the factory ground wires in the car? Or just leave them?
Not from the battery, from the starter solenoid.biglg said:Secondly, Can someone in simple terms tell me exactly what I need to do to wire this alt up? Here is what I think is correct.
Take 4 gauge directly from the battery to the stud on the alt, going to put in a 150A inline fuse.
Maybe this picture will help.biglg said:The one factory alt plug, keep all wires intact and plug into the alternator.
Cut the connector off the other plug. Now, I believe the two black and orange need ring terminals, connect these two to the stud on the 3G alt as well. Correct? The remaining wire from this connector I connect to the little connector on the 3G alt? Stator?(SPELLING?)
The 2 black/orange wires are in the second plug that is no longer needed because you are using the 4 gauge wire to replace them.biglg said:Now I have read do not connect the black/white wires. I dont know where those are at or what they are talking about. I think I am on the right track.
You DON'T use the 2 (10 gauge) black/orange wires from the second plug.biglg said:So, do I do anything to the ground? What wires do I not use out of the factory alt connectors? Do I remove any wiring? Please a little more help on this. Thanks, Landon.
Sounds good.biglg said:I purchased a pipe and used it as a breaker bar, it made it 100 times easier to get the belt on.
All i need to know now is where to put the inline fuse on the 4 gauge power wire. Should I put it closer to the alternator, or closer to the power wire where it connects to the power side of the solenoid? I have read to put it both places. Which one would be better? Closer to the solenoid, or the alternator? Thanks.
srothfuss said:I should be thanking you...
Big:
The 3G pulley is slightly larger in diameter than the 2G. I have a picture in this thread of the two side by side. So think of it this way:
Stock 2G alternator puts out - 65Amps when it's spun up. @ Idle it only puts out about 20Amps or about 1/3 of it's total output
Now lets think about the 3G. At full tilt it puts out 130Amps. @ Idle it puts out about 43Amps or about 1/3 of it's total output. With the stock Mystang pullies and a 3G pulley on the alternator you are still much better off than a 2G setup. It's worth the 2 hours of wrenching to do the swap....
If you bought that belt recently you can take it back to the parts store for a exchange on a different size.