Alternator Output not keeping up with audio system |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Alternator Output not keeping up with audio system |
Kansas 914 |
Oct 25 2011, 11:14 AM
Post
#1
|
Advanced Member Group: Members Posts: 2,999 Joined: 1-March 03 From: Durango, Colorado Member No.: 373 Region Association: Rocky Mountains |
I installed a Boston Acoustics GTA-504 and since install I have not been able to charge the battery during long drive with the music cranked up. I really thought the 55AMP alternator would have been fine for the small amp.
I am running 6.5" separates on 2 channels and bridged the other 2 channels to mono for the sub. All speakers are 4 ohm. There are two 25A fuses on the amp and I added a single 60A in-line at the battery for the power to the amp. No fuses have ever blown - but I wondered if the alternator is actually cranking out 55 Amps. If I don't drive with the music on it works and charges the battery fine. I think I might just install a bus alternator (75Amps) unless others think it is a mistake. Link to install manual: http://www.bostonacoustics.com/PDFs/manual..._2_4_Ch_Man.pdf Quick Specs: |
Spoke |
Oct 25 2011, 01:39 PM
Post
#2
|
Jerry Group: Members Posts: 6,992 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Not charging the battery with the amp can be tested with a voltmeter on the battery.
You can test this by running the car at about 2k RPM with all electrical appliances off and a voltmeter on the battery. Monitor the battery voltage and turn on electrical appliances one by one; lights, amp, etc. and see when the battery voltage drops. |
Lo-Fi Version | Time is now: 13th June 2024 - 05:46 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |