posted
ok i have a battery under the hood and it has 700ca and i have the stock alt im guessing its around 90-100 amp's (92 ford explore).when i burp my voltage drops to around 11v and dosent go any lower my amp pulls 112amps at full tilt so my question is..is my amp pulling all 700ca from my battery in 3 seconds?BTW if i rev my engine i gain 3 tenths of a DB. and how is a battery rated?
Aaron
-------------------- old system 2400watts RE15XXX a 153.9 on a linear X new setup-2 10w3's and 1600w Posts: 670 | From: spring lake NC | Registered: Aug 2002
| IP: Logged |
posted
someone correct me if im wrong.. its been a while since high school auto class..
batteries are conventionally rated in CA (cranking amps) and CCA (cold cranking amps)
CA is measure at i believe 70 degrees??? it measures the amount of power the battery can put out before it drops to a certain voltage (mid tens i believe). after it drops below this voltage it is usualy of not much use to a vehicle , and certainly not car stereo equipment.
CCA is measure i believe the same method, but at 32 degrees or 0 degrees, i forget.
then there is reserve capacity... where a relatively small load is placed on the battery for an extended amount of time and it is a time measurement of power, time is counted until the battery reaches a certain voltage.
so to answer your question.. you are probably not using ALL of the available power from your battery, as a battery can supply hundreds of amps for a short time. you are however exceeding your alternator's output amperage, and is then sucking power from the battery too.
Posts: 1854 | From: freezing in FAIRBANKS ALASKA | Registered: Aug 2000
| IP: Logged |
posted
that was a good way of saying it, when he is running the jbl1200.1 (that is the amp I believe he is talking about) he is bringing the bat down as well. However, it should take less than 5 minutes to bring it back up to a okay charge.
my advice, get a better battery, or upgrade your alt. This is coming from somone who's single amp draws 400 amp at full burp.
also, your amp is drawing 112 amps at full, at daily driving, figure about 80 amps or less (depending on your volume level). At reasonable levels (ie. the people next to you give you dirty looks, but your coffee is staying in it's cup) around 40 amps.
-------------------- Visit Crystalmobilesound at Carl Casper on Feb 20-22 in Louisville KY!! Posts: 506 | From: chicago, Il | Registered: Dec 2001
| IP: Logged |
Printer-friendly view of this topic