Alternators

98 Nitro

I'm Awesome
Joined
Apr 10, 2017
Messages
304
Reaction score
125
Location
Indiana
What brand to buy? The two alternators I put in my 98 each lasted 2 years almost to the day. One was Ac Delco one was Powermaster. Anybody make them out of quality parts anymore?
 

99Yak

Newbie
Joined
Feb 3, 2017
Messages
38
Reaction score
67
Location
Northern Ohio
Fwiw, I have my starters and alternators rebuilt. The local guy doesn't leave me along side the road.

These guys like to hide in plain sight. Ask around. There is probably a rebuilder nearby.
 

Schurkey

Supporting Member
Supporting Member
Joined
Jan 14, 2018
Messages
6,229
Reaction score
6,500
Location
The Seasonally Frozen Wastelands
Really good output @ idle because of the Wye windings inside vs. the delta windings most of the others use.
How does the Wye winding improve output at idle?

I've always favored Wye windings, but only because they can be tested with an ohmmeter; delta windings can't be.

Had no idea there was a difference in output related to the style of construction.
 

Frank Enstein

Best. Day. EVER!
Joined
Jul 15, 2018
Messages
1,853
Reaction score
3,041
Location
Deerfield Twp. Ohio
How does the Wye winding improve output at idle?

I've always favored Wye windings, but only because they can be tested with an ohmmeter; delta windings can't be.

Had no idea there was a difference in output related to the style of construction.
I really don't know how but that's what the rep from Powermaster told me. At the time their 100 amp alternator could produce 70 amps @ idle (2400 alternator rpm) and the Summit equivalent could produce 20 amps but both could produce 100 amp at highway speeds (6000 alternator rpm).
 

df2x4

Domestics only.
Staff member
Super Moderator
Joined
Mar 1, 2012
Messages
9,513
Reaction score
8,807
Location
Missouri
DC Power Inc, Mechman, and Ohio Generator are a few other popular names in the aftermarket high output alternator world. I have a smaller one from Ohio Generator on my red truck, it's taken quite a beating for the past decade plus and is still working great (knock on wood). None of these brands are cheap, but I believe they all have options for very high (think 150A+) output at idle. Probably overkill for most people, but if you're running a ton of lights/fans or a giant stereo they might be worth a look.
 

98 Nitro

I'm Awesome
Joined
Apr 10, 2017
Messages
304
Reaction score
125
Location
Indiana
DC Power Inc, Mechman, and Ohio Generator are a few other popular names in the aftermarket high output alternator world. I have a smaller one from Ohio Generator on my red truck, it's taken quite a beating for the past decade plus and is still working great (knock on wood). None of these brands are cheap, but I believe they all have options for very high (think 150A+) output at idle. Probably overkill for most people, but if you're running a ton of lights/fans or a giant stereo they might be worth a look.

Ya my truck is just stock no extra stereo or LED lights or anything but I do tow a bass boat at times so some extra lights but nothing major.
As to Powernaster maybe it is superior the card that came with it says it tested @100A-idle, 115-cruise, 126-top end, but it did not last any longer than the Delco one.
 
Last edited:

baxterday

Supporting Member
Supporting Member
Joined
Jan 26, 2022
Messages
36
Reaction score
40
Location
Ellijay, GA
I have a bunch of high power stereo equipment and was looking into a 200 amp alternator. Thanks for the suggestions. I am also running two batteries.
 

Kran

OBS Enthusiast
Joined
Mar 6, 2017
Messages
82
Reaction score
67
Location
Illinois
DC Power Inc, Mechman, and Ohio Generator are a few other popular names in the aftermarket high output alternator world. I have a smaller one from Ohio Generator on my red truck, it's taken quite a beating for the past decade plus and is still working great (knock on wood). None of these brands are cheap, but I believe they all have options for very high (think 150A+) output at idle. Probably overkill for most people, but if you're running a ton of lights/fans or a giant stereo they might be worth a look.
all 3 brands listed are fantastic. i'd add in singer (not stinger) alternators as well. i know multiple people with dc power alts with 100k+ miles on them. i myself have 2 singer 370a large case alts (and 1 CES 370a), which are rated for about 220a at idle.

if you want better idle output (and cooling to go along with it, more surface area), use a large case alternator like ad244 or dr44. a 220a large case alt will do about 180a at idle, whereas a 220a small case will do about 155.

hairpin alts are better than delta winding alts hands down. easy way to tell is if the stator looks like a bunch of hairpins side by side. they're a bit more expensive but worth the performance gain imo.

You must be registered for see images attach
 
Top