Dual Stock Alternators or one High Output?

[K30Blazer]

My stock LS alternator (140 amp Bosch) seems to be on the way out. I am rarely seeing anything above 13V even and freeway speeds and am in the market for a new alternator.

I am shopping the high > 200 amps alternators but also considering running dual stock 140 Alternators.

I have a Hellroaring Dual Battery Isolater Combiner, and would like to maximize not only my CCA but my running amps.

What say you?

 

[wetoolowdingbangow]

There's no way that 140 is being maxed out. Maybe if you were winching with subwoofers pulling on the system...which I've seen a 140 handle.

That said I'd run a 200a long before I ran 2 alts. Is that stocker a cs144? If so there are 200 amp kits.

 

[K30Blazer]

yeah, I don't think the 140 amps is being maxed out, I question whether my alternator is putting it out

 

[K30Blazer]

no, it isn't a sbc it is a ls motor

 

[wetoolowdingbangow]

I was going to mention that the pcm can limit it's output...worth going and having the alt tested. I'm sure you have it aligned right and haven't burned the bearings out.

 

[K30Blazer]

Yea I got it tested. They say the alt and diode are good but output volts are low

 

[wetoolowdingbangow]

Interesting. Ive had them test good too but low output. The last time that happened was because I didn't have a cap on my subs.

Bosch usually makes good stuff...maybe it was a dud....

Dumb question, its not an over drive pulley?