Will a 90 amp alternator be able to power my system???

[massiveian 10+ year member]

I have a 2000 stratus with the stock 90 amp alternator. I know it only puts out 90 amps over 2000rpms. So its probably about 55-60 amps at idle. I have 2 kenwood subs that put out 400W rms and 1200W max each. I dont have an amp yet but i would like to probably get an amp that puts out about 1000W RMS at 2 ohms.

Would my 90 amp alternator be sufficient to power my amp and subs or will it be to much of a load and ruin the alternator quickly?

The only other thing i would be powering is a sony headunit and just the rest of the electronics that come stock with the car. lights etc...

I dont want to upgrade the alternator until at least spring when i have the cash for it.

So i just need to know if my 7 year old 90amp alternator be able to withstand the amp power?

Thanks

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[SethPhillips 5,000+ posts]

im running everything in my sig off my stock alt.. with little headlight dimm... rarley drops under 13.v

 

[revrider1 5,000+ posts]

You will most likely have some bit of dimming with 1000watts on a 90amp alty. Upgrade your battery and do the BIG 3 and you should be fine.

 

[SeanDub 10+ year member]

You'll be fine. Get an 800 rms amp, the impedance you want the power depends on the voice coils of the subs. Don't go much over the 400 rms a piece, that 1200 max means absolutely nothing.

 

[J31Rob 5,000+ posts]

You will most likely have some bit of dimming with 1000watts on a 90amp alty. Upgrade your battery and do the BIG 3 and you should be fine.

depending on other things running in the car..

i ran 1000 rms all day on stock 85 amp alt.. no dimming, no big 3.

 

[tRidiot 10+ year member]

I'm running nearly 3kW all Class A/B off a 90A alt. I get voltage drop when hammering on it at stoplights, but when I'm doing anything more than idle, I pretty much stay in the 12s and 13s.

 

[revrider1 5,000+ posts]

i ran 1000watts on my 90amp alty and had very minimal dimming, just stating to be safeer...

 

[crunktimes.com 5,000+ posts]

Running 1100@1ohm here no issues now other than a bit of dimming at night when it is reall yloud.

 

[zeuolaxxx 10+ year member]

do Big 3 and you will be fine!

 

[snoopdan 5,000+ posts]

dude, just buy yourself a cheap 800 cca battery at walmart and wire it in parallel in your trunk to the setup. easy.