All Small Six New alternator help

[beanmiester]

I need some help deciding between these two powermaster alternators.

Powermaster 57759 Powermaster Street Alternators | Summit Racing

Free Shipping - Powermaster Street Alternators with qualifying orders of $109. Shop Alternators and Generators at Summit Racing.

www.summitracing.com

Powermaster 577591 Powermaster Street Alternators | Summit Racing

Free Shipping - Powermaster Street Alternators with qualifying orders of $109. Shop Alternators and Generators at Summit Racing.

www.summitracing.com

I've decided to just go with a 200 amp because of all the electrical nonsense thats being added to this car. The fan and ac have a big draw. Thats only going to get worse when the radio gets installed. The previous owner put some crazy speakers in it.

Both say they have an internal regulator but the one ending in 59 says its not one wire capable. Im just wondering what one would work best and what id have to do with the one thats not one wire capable

 

[bmbm40]

What are vehicle are you upgrading the alt in? At the very least you need 2 pulleys on the new alt unless your vehicle is set up for serpentine belt and the associated pulleys on the balancer. And electrical upgrades, wiring and stuff. The Ford 3G is often used but not sure if they are available at 200 amp.

This is from a post I read:
"Go with the 90 amp version and size the pulley to a 2 to 1 ratio with the crank pulley. The 120 amp 3G alternator, both really, produce alot of charging at really low rpms, near idle. Unless you are running 2v pulley's with matched belts or a serpentine setup it will squeal when charging at start up or when needed and you'll screw up the alternators bearings trying to stop it by re-tightening the belt all the time and changing belts every month or 3. The 90 amp model is more than adequate, has all the low rpm charging of the 120 but will run good on a single belt at a 2:1 ratio, which is where you need to run it. Ask me how I know"

 

[beanmiester]

What are vehicle are you upgrading the alt in? At the very least you need 2 pulleys on the new alt unless your vehicle is set up for serpentine belt and the associated pulleys on the balancer. And electrical upgrades, wiring and stuff. The Ford 3G is often used but not sure if they are available at 200 amp.

This is from a post I read:
"Go with the 90 amp version and size the pulley to a 2 to 1 ratio with the crank pulley. The 120 amp 3G alternator, both really, produce alot of charging at really low rpms, near idle. Unless you are running 2v pulley's with matched belts or a serpentine setup it will squeal when charging at start up or when needed and you'll screw up the alternators bearings trying to stop it by re-tightening the belt all the time and changing belts every month or 3. The 90 amp model is more than adequate, has all the low rpm charging of the 120 but will run good on a single belt at a 2:1 ratio, which is where you need to run it. Ask me how I know"

A mustang. I have ac in it so a belt comes off the compressor and goes up to the alternator. Also a 3g is the one with 3 wires right? If so the one ending in 59 is a 3g. Really I'm wondering if one wire or three would be better

 

[beanmiester]

Ford 200 btw. Forgot to include the engine

 

[bmbm40]

I believe the 3G alts came off 1990s vehicles.

 

[B RON CO]

Hi, add up the amps on the fuse block, and any accessories hooked up directly to the battery, excluding the starter. The total will not come near 200 amps, probably less than 100. My 2022 F150 has a 175 amp system, with a gel cell battery, and many electric goodies including electric steering. Good luck

 

[ActionYobbo]

I am running a10si with an output of 80 amps. You can get them from 65 to 140 amps. It’s fits and it works

 

[DON]

The belt set up on the 200 with ac is …less than desirable . The ac and alternator run off one belt. It is a lot to ask of a v belt!! Plus you have to loosen one, then tighten the other, then retighten the first oneI want to figure out how to run at least 2 belts or a serpentine— I’m not there yet. Without the belt modification I would stick with a 100 amp. Remember Powermaster wants you to send the whole thing back for repair but you can get correct parts (brush set, slip ring- what brushes ride against, rectifier, and regulator) , from Amazon and probably auto parts stores.