Why 3G?
- Thread starter paczowski123
- Start date
honestly i forget how the factory harness is. i have had one wire alternators in 3 previous mustangs. I can look at mine if it helps
if i recall correctly you run a new power wire from the starter solenoid and tap in to one leg of the factory alternator harness
you guys that have bought a 3g, what amperage is best to get? I see them all the way up to 250 amp...
Shakerhood
20+ Year Stangneter 
Oh man...ya know...it's probably been a year to a year and a half since I bought it. I don't remember anymore. I checked my old history, but noting is jumping out. I just did a quick Ebay search though. There are litterally dozens to choose from on there.
Output current per RPM is more important than overall rating IMHO. Most folks want an alt that puts out decent current at idle, and some 200 amp units don't do that.
I agree with Shaker and others regarding the best choice - a big case (3G). 6G's don't put out as much total current.
If you are serious about going with a super high-output unit, note that the 6 rib belt becomes a limiting factor.
I agree with Shaker and others regarding the best choice - a big case (3G). 6G's don't put out as much total current.
If you are serious about going with a super high-output unit, note that the 6 rib belt becomes a limiting factor.
Gotcha, theres so many that i eant to be sure to get one thats not a piece if sht ya know!
Unless you are powering the space shuttle, no need to go past 130a, especially on a simple car like a Mustang.
My daily driver has a 130a alt and powers much more like AC, heated seats, Navigation, HiDs, e-fan, 6-disk cd, etc etc without dimming the lights at all.
Just don't slap underdrivr pulleys on the car unless you run a tiny overdrive alt pulley
Sent from my iPhone 4S using Tapatalk
Just got response from ebay seller powermaxusa regarding their 160 amp alternator. They say it puts out 40% of the rated 160 amps at idle and 70amps ad idle with overdrive pully. Does this seem about right and would you guys recomend the od pulley?
Exile
Active Member
Fox Mustang 3G 4 Gauge Power Wire Kit
http://www.latemodelrestoration.com...3G-Alternator-standard-4-Gauge-Power-Wire-Kit
Exile supplied a link for a product to help you out.
To be explicit, do not run a 3G from the stock power wire(s), not even for a week while waiting for a cable to arrive. If you're really in a pinch and the alt is already installed, some bulk cable (or a 4 AWG starter cable, cut to length), some terminals (parts store, home store, stereo shop, etc) and an inline fuse (parts store or stereo shop if sourced locally. Pep Boys and Napa used to stock big fuses and holders) could be used till the dedicated cable arrives.
In either situation, be sure the fuse rating is appropriate for the weakest link (usually the charge cable).
You posted this while I was pecking. As you can see, please don't do it at all. The upgraded cable is a necessity.
I would not even start a 3G car with the stock charge wires (even if I was standing there and going to shut the car off 5 seconds later).
Similar threads
