Alternator

[caliece 10+ year member]

How many amps for an alternator would you guys suggest for a 1500 watt system thank you.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

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[Lakota 5,000+ posts]

1400w pulls about 180 amps of current, so I'd go with a 200+ alt.

 

[caliece 10+ year member]

does it cost alot to get a stock alt rewound

 

[Randy Savage 5,000+ posts]

You don't need 200+amps for 1500...you can get a nice 150-180a alt and you'll be fine.

 

[caliece 10+ year member]

You don't need 200+amps for 1500...you can get a nice 150-180a alt and you'll be fine.

thats what i was thinking and would it be cheaper to get the alt rewound.

 

[Randy Savage 5,000+ posts]

It'll probably be cheaper...but I'd just look into getting a new one alltogether.

Not so sure if they still have it, but Irragi alternators is/was running a group buy, 30% off

 

[HydroCloud 10+ year member]

Yea, I think that the GB is running until February 15th now.

 

[caliece 10+ year member]

It'll probably be cheaper...but I'd just look into getting a new one alltogether.
Not so sure if they still have it, but Irragi alternators is/was running a group buy, 30% off

well here my prob im running 1500 watt rms on a stock system so could i just add a second alt to the AC compressor instead of just using one alt

 

[baseballer1100 5,000+ posts]

hmm how do you figure out how many amps somehting pulls?

 

[davidwm88]

its P=IV where P is in watts and V is the voltage. So if you have 1400 watts you divide it by 14.4 to get the current in Amps. 1400/ 14.4 is 97.777 amps. That is if the Amps are 100% efficent. Also about 40% if the alts power will be to run the car so take that into considerration. So around 140-170 would be one for that size stereo.

 

[GCAdidas13 10+ year member]

its P=IV where P is in watts and V is the voltage. So if you have 1400 watts you divide it by 14.4 to get the current in Amps. 1400/ 14.4 is 97.777 amps. That is if the Amps are 100% efficent. Also about 40% if the alts power will be to run the car so take that into considerration. So around 140-170 would be one for that size stereo.

40% of the STOCK alternator's power*

like if you have a 100amp stock alt, about 40amps will go to car's electrical

if you upgrade to 200amp stock alt, still about 40amps will go to car's electrical