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Incredible...
Nobody has mentioned the HP drop when the alternator kicks in to drive those (2) electric fans..
Electric fans can draw up to 35 Amps, while many OE Mopar alternators were only rated < 50 Amps...

Just my $0.02...



HP drop was measured and factored into the dyno tests. HP drop is much less than that of a mechanical fan but yes, there is an additional load placed on the alternator from the electric fan. After all, nothing is free.

That being said an electric fan can cut off entirely when it's not needed (ZERO loss) unlike a mechanical fan.

As I already mentioned, adding electric fans will most likely necessitate upgrades to the charging circuit or you will create more problems. As for my car, I went to a 100 amp alternator and I don't have discharge unless I am idling in gear/lights on/AC on/hi blower/fans on @ the same time. This all goes back to the "well-planned" part I talked about.



I wouldn't call that "well planned" if your car discharges at idle with everything on. That's not any good.

I recently installed a 99 amp powermaster alt in my ride. Made a huge improvement and it put's out good down low. I also put my lights and AC on relays and my lights stay bright at idle now, 13.9-14.1 volts bright at idle with the new alt.
I can't stand when a car discharges at night and the headlites dim. I always kept my foot on the gas some to keep the Rs up so my headlites stayed on. No more.

I think this powermaster could handle a 30 amp fan at idle?? Don't know it might be a problem?




Seriously? The OEM setup on my car 60 amp alternator would be discharging at idle if you turned on the lights and nothing else. So yeah, I'd say that only having a minor discharge with everything on at 700-750 rpm idle is absolutely acceptable considering a 20 amp draw from the fans which may or may not be on.

100 amp alternator is the biggest you can get for any reasonable amount of money that drops in and appears factory. My unit has the same specs as yours so I bet with yours...you'd be in the same boat.

Ask Powermaster what they define as 'idle'. I bet its 2400 alternator RPMs which would equate to 800 engine RPMs which I'm not running that high in gear. Since the output of an alternator is profoundly NOT linear in the lower ranges, this means you see significantly less than the stated idle output...that is unless you up your idle so your running 800 rpm in gear.

Sure enough, if I put the car in park/neutral, the RPM's rise closer to 800 and the discharge is gone.

But back to my original point, my charging circuit isn't perfect as it still can discharge in a few cases but it is 500% better than the factory performance. It looks factory without having some huge GM alternator on my engine. So yeah, I can accept a slight (<10 amps) discharge when I have ALL my accessories on at idle in gear and yes, I consider that well-planned.