High Output Alternator (1 Viewer)

[JerryLX450]

Guys:

Can you please help me out on this one:

http://www.man-a-fre.com/feature_items/meangreenalternator80ser.htm

Whats the Advantage and Disadvantage by having Hi-output alternator?

Thanks

Jerry

 

[concretejungle]

I asked about one a long time ago, i believe the consensus was that it was overkill. Unless you are running 4 batteries and a ton of stuff at one time then an OEM unit is the way to go.

 

[JerryLX450]

Is that true i heard from being overcharged sometimes the battery itself can explode???

 

[Bruneti]

First thing's first: I am assuming a properly functioning electrical system, good alternator, good battery, good cables, good connections, etc... AND the vehicle running...

I believe the stock Nippondenso alternator is an 80amp unit. Your vehicle's electrical load determines if this is sufficient. Obviously it is sufficient for a stock vehicle. If you use a lot of aftermarket add-on's (such as driving/fog lamps, backup lamps, electric winch, stereo amplifiers, air compressor, electric fans, electric trailer brakes, etc., etc.) this could cause your electrical load to be more amps than the alternator puts out. This is normally for very short periods of time, and your battery will be used to supply the additional current. If this load is extended for a longer period of time (such as extensive use of a winch), repeated frequently (bass beat hitting on a big stereo), or many items used at once, it could begin to seriously drain your battery. Voltage will begin to drop, headlights will begin to dim, etc. Your alternator is not keeping up. This is a definite reason to get a H.O. alternator. (reference first statement of post)

Some batteries can utilize the higher current of a high output alternator to recharge faster.
This is from the Optima Red Top spec sheet:
Rapid Recharge:
Maximum voltage 15.6 volts (regulated). Maximum current: No limit as long as temperature < 125°F (51.7°C).

If you have additional loads on your electrical system, a high output alternator is a common item these days. There are many sources for these. The one you linked to is over $100 more than the 150 amp I was quoted by Alterstart Systems (no connection to me). Many local rebuild shops can re-work an alternator to raise output amperage. You can even get them at slightly higher output voltage, but this can become risky on the electronics. Big car stereos have made these mainstream items.

 

[Bruneti]

I looked closer at that Mean Green alternator. I says output is up to 300% above stock. I think that is unbelievable overkill. 100% above stock (160amps) would be more than enough for nearly anyone.

 

[flintknapper]

FWIW, I like "Alterstarts" products. I have two 160 amp. alts. of theirs on other vehicles that I own and I am pleased them.

They make a 150 amp. unit (all new) for our Cruisers for about $250.00 and I will be replacing my OEM with it (if it ever fails).

It makes 55-60 amps. @ 800 rpm. and the full 160 @ 1600 rpm. (great for a winch).

I am not affiliated with them in any way....just a satisfied customer. If you have no need for a high output unit then please do the right thing and "feed C-Dans dogs" when yours quits.

just my .02