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ty 
Copper - Posts: 137
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: September 16, 2004
Location: United States
Posted: February 01, 2005 at 4:00 AM / IP Logged  

I have done my searching and I just want to double check before I invest.  I am currently running 1000 watts rms for my sub and 150 rms for mids, however will soon be running about 300 to 400 rms for mids, so totalling 1300 to 1400 watts rms.  I have read that you take the rms wattage, double it and divide by 13.8 and that gives you amperage, if that is the case, I will be running 188 to 202 amps.  As of right now I am running stock alternator, stock battery which I know I need to change very soon.  The only high output alternators I have seen though for my 00 civic are 150 amps, will this alternator be enough?  I have also read that you can run a second battery in the trunk and just run an isolated wire from the alternator, will this help my situation? 

Should I buy the alternator and the yellow top and run an isolated wire?  Please any input would be appreciated, thanks.

cruelneo 
Copper - Posts: 77
Copper spacespace
Joined: January 26, 2005
Location: United States
Posted: February 01, 2005 at 8:04 AM / IP Logged  
i would buy the red top battery and buy a cap. before getting the alternator.
Paradigm 
Silver - Posts: 284
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Joined: November 25, 2003
Location: United States
Posted: February 01, 2005 at 8:36 AM / IP Logged  

cruelneo wrote:
i would buy the red top battery and buy a cap. before getting the alternator.

This will be a waste of his money and will not alleviate the problem. Buy a high output alternator FIRST - that alone should be enough if you can find one for your vehicle and amperage draw. THEN you might think of getting a RED / yellow top Optima battery, and lastly (if at all) a capacitor. Hope this helps.

VEHICLE: 2002 GMC Sonoma ZR2
Alpine CDA-7940
AudioControl EQT x2
JL Audio 1000/1
JL Audio 10W6 (originals) x3
Kicker ZR120
Kicker ZR460
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Polk GXR-4 x2
wheelerdr 
Copper - Posts: 337
Copper spacespace
Joined: October 25, 2004
Location: Louisiana, United States
Posted: February 01, 2005 at 8:43 AM / IP Logged  
if your looking at your auto store for your alt yes around 140 to 150 amp, go online and check some companies some will build one for your I would get atleast 200 or 300, and forget the red top get yellow top.
aphinney28 
Member - Posts: 1
Member spacespace
Joined: February 01, 2005
Location: United States
Posted: February 01, 2005 at 2:47 PM / IP Logged  
i would do the big three then if that doesn't work get a HO alt then i would get a deep cell battery and if that all fails...WHICH IT WON"T i would then get a cap...but CAPS ARE WORTHLESS...WASTE OF YOUR MONEY.
aphinney aka the loudest 17 year old
ty 
Copper - Posts: 137
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: September 16, 2004
Location: United States
Posted: February 01, 2005 at 3:25 PM / IP Logged  
the big three meaning engine grounds right?  What gauge wire should I use? 
supradude 
Silver - Posts: 915
Silver spacespace
Joined: September 21, 2004
Location: South Carolina, United States
Posted: February 01, 2005 at 4:03 PM / IP Logged  
I would go ahead and get the HO alternator. Forget the idea of a cap. They are only good for wearing on top of your head.
'85 Toy
jvillefinest 
Copper - Posts: 255
Copper spacespace
Joined: December 29, 2003
Location: Florida, United States
Posted: February 01, 2005 at 6:51 PM / IP Logged  

Yea definatly forget the cap i got a tsunami capacitor and it did nothing. So now i have a $150 paper weight instead of having that money toward a high output alternator! grrr oh well good lesson learned!

2007 Acura TSX
SQ setup in the works
Paradigm 
Silver - Posts: 284
Silver spacespace
Joined: November 25, 2003
Location: United States
Posted: February 02, 2005 at 8:10 AM / IP Logged  
jvillefinest wrote:

Yea definatly forget the cap i got a tsunami capacitor and it did nothing. So now i have a $150 paper weight instead of having that money toward a high output alternator! grrr oh well good lesson learned!

You just illustrated my previous point. alternator? -- posted image.

VEHICLE: 2002 GMC Sonoma ZR2
Alpine CDA-7940
AudioControl EQT x2
JL Audio 1000/1
JL Audio 10W6 (originals) x3
Kicker ZR120
Kicker ZR460
Polk GXR-6 x4
Polk GXR-4 x2
DDexter 
Member - Posts: 18
Member spacespace
Joined: December 03, 2004
Posted: February 02, 2005 at 11:15 AM / IP Logged  

ALTERNATOR and supporting wiring gage first.  All the battery is used for is to start your car.  If you listen to your system with the engine not running, then you should look into a battery.  CAP = I agree, big waste of money ... Your battery is effectively a CAP.

It has been repeated many times.  When the engine is running, the ALTERNATOR is supplying electrical power to everything and charging the battery (unless something has gone wrong of course).

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