Team Polizei 144

Audi of American says that my alternator is damaged and my battery run down by my aftermarket audio system.

Does anyone have experience with this?

Can someone recommend a high performance alternator replacement?

Thanks,

danielr

2000 S4 Black/Black
UUC shifter/UUC VM2 Exhaust/MTM chip
18" BBS RXII/Potenza S-02
V1 Hardwired

Alpine/Focal aftermarket audio system

britoki (Brian T)

If you're not using it without the engine running, then there's got to me some kind of short in the wiring. I dunno, can you check to see if the power line's pulling current when the engine is off?

I'd guess that what's happening is something is running the battery low when it's off and working the alternator heavy when you start it up again.

Audiboy

Wow, good luck in finding one. How many amps are you running?

LCP

First off, the alternator was not powerful enough to handle the 60-70 amps of current my amps were drawing. Second off, starting the car with a drained battery was likened to jump starting a car, which will kill an alternator. Third off, I was even running a second battery in the trunk that powered the amplifiers and was isolated via a dual battery isolator. Phoenix Gold made the dual battery isolator (which I still have and would sell cheap to anyone that wants it), but I don't remember who made aftermarket alternators back then or if they still do now (maybe it was PG?). Post in audio forum for more insight. If you're running less than 50 amps on your S4, you shouldn't have a problem UNLESS you're draining the battery by playing it with the engine off for substantial periods of time (20-30 minutes or more).<p><img src="http://pictureposter.audiworld.com/AudiWorldPics/2000/LCPawsig1.jpg">
- Lance (corporate lawyer type turned track time junkie)
"I can't stop apexing"

MoBrazen

1. Get aftermarket battery! I prefer Odyssey because they're dry cell, not gel like Optima.
The PC 1200 fits perfectly in our battery compartment, but it's not as wide as stock battery. Should be about $200. Worth every penny!!!

2. Capacitors. Do you have any? Are you running subs? I would look into a .5 Farad or 1.0 Farad depending on how many watts you're running.

3. Alternator - This is the hard part. Most everyone make high output alternators for everyone else except Audi/VW (my experience). I spent many hours trying to find a high-output alternator to run my system, but no luck. You could have someone rebuild one for you to achieve this, but that's up to you. I'm running close to 1000 watts, so believe me when I say I needed more juice. Get the Odyssey battery, you won't be disappointed.

And just so you don't think I'm playing around, my install pics are on page 6 of the Audio forum today. Or cut & paste this: https://www.audiworld.com/forum/m/audio/msgs/2712.phtml

Hope this helps! And ALMOST ALWAYS play your stereo with the car running! Easiest way to avoid draining the battery.<p>"I'm that Blue Menace in your rear view!!!"

<a href="http://registry.audiworld.com/audi/registry/details.asp?car=4667">'Blue Menace</a>

<ul><li><a href="http://www.odysseybatteries.com/home.htm">http://www.odysseybatteries.com/home.htm</a</li></ul>

Team Polizei 144

Thanks for the suggestion.

Here's what I'm running:

Alpine 7941 head unit
Alpine DSP processor (doesn't power down with other items)

2x Alpine 4 channel amps

1 x capacitor

Jim De Arras

making any more!<p>Jim De Arras

<a href="http://www.imola.org">2000 00 Imola/Onyx/Alcantera S4</a>
MTM Stage III (350 HP!)
MTM Full Suspension
MTM/Pagid Brake pads
UUC Short Shifter (original 20%)
Michelin Pilot Sports.
SmartTire Tire Monitor

BenM@University Audi

How much power you running out of your system? I'd get a new battery and a 1.0 Cap