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Battery and alternator advice

 
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  #1 (permalink)  
Old 13 Apr 2011, 12:53 pm
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Default Battery and alternator advice

I'm probably good stock, but I figured I should ask first. As they say, the stupid question is usually stupid because you didn't ask it and should have.
Just picked up a 2005 sedan with a 2.4L non-turbo for my son.
I'm looking through my spare parts and I have a couple of very musical 8 inch subwoofers that aren't doing anything right now, along with an old school Rockford Fosgate amp. By old school I mean they re-issued some based on 25 yeard old designs redone with modern componentry just a few years ago. If you remember these, they are the ones that were typically rated at 12 volts even, so their real power was three or four times the rated capacity. I have a 150 watt unit in the box that's just begging to go into the kid's car. The question is, are the stock battery and alternator sufficient? Because of the small subs, the gains will be kept low, so I suspect that we are okay, but I wanted to make sure.
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Old 13 Apr 2011, 02:35 pm
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Default Re: Battery and alternator advice

For 150 watts, your fine with the stock battery and alternator.

you don't have to think about any of that until you go over, @ BARE MINIMUM 500 watts RMS; 1000 max.

In the tech forum, i wrote 2 good articles. one on High Output alternators, the other on batteries.

reference them, but you don't need with 150 watts.

Sourced Information about: (HO) High Output Alternators for the Chrysler PT Cruiser

OEM Battery Replacement with a Deep Cell Battery. Research here
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Old 13 Apr 2011, 06:11 pm
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Default Re: Battery and alternator advice

YOUR SIG SUCKS!
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Old 13 Apr 2011, 08:03 pm
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Default Re: Battery and alternator advice

Change in plans. Turns out the amp is the big boy. 500 watts of clean with 1000 when it gets a little dirty. Going to scout out a 12 inch single for him.
Now we need a heavier battery and maybe an alternator.
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Last edited by mid_life_crisis; 13 Apr 2011 at 08:31 pm.
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Old 13 Apr 2011, 10:02 pm
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Default Re: Battery and alternator advice

I find it odd that you appear to have an electrical background in the thread concerning crossovers and started this thread.

Anyway, If I recall correctly the stock altenator is around 130 amp.

Here is an interesting write up to determine electrical requirements of a system. Power Requirement Tips

Have done any upgrades yet? Big 3 maybe??
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Old 13 Apr 2011, 10:48 pm
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Default Re: Battery and alternator advice

Quote:
Originally Posted by lowpt View Post
I find it odd that you appear to have an electrical background in the thread concerning crossovers and started this thread.

--------------------
Have done any upgrades yet? Big 3 maybe??
I'm not familiar with the car. I know from experience that some vehicles have alternators/batteries with extra room for add-ons. It made sense to ask people who know the cars what I could do with the stock system and when it would be necessary to start beefing it up.

---------------------

Have done nothing yet. Picked it up yesterday. Planning the upgrades already and it isn't even mine.
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Old 13 Apr 2011, 11:49 pm
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Default Re: Battery and alternator advice

Quote:
Originally Posted by mid_life_crisis View Post
I'm not familiar with the car. I know from experience that some vehicles have alternators/batteries with extra room for add-ons. It made sense to ask people who know the cars what I could do with the stock system and when it would be necessary to start beefing it up.

---------------------

Have done nothing yet. Picked it up yesterday. Planning the upgrades already and it isn't even mine.

LowPT is on target. Knowledge of a 'crossover' usually means expereince with advanced car audio systems.

so now if your amp jumped from 150 to 500 RMS (not Max).

I would do upgrades in this order.


1) Capacitor of 10 or more
2) Big 3 Up Grade
3) Deep Cell Battery Replacement
4) Second battery
5) High Output Alternator


it all depends on what the use of the system is. If you are at car shows or a daily driver; that will slightly vary the order I put those.

But since you do 'know' what a crossover is, but don't know what the big 3 is, I am more concerned if you got a proper car audio/electrical system education.


How does one say there amp is 150; then say it's 500.

It's like if my wife said, my diamond is 1.5 carets, then said it's 5.0 carets. Just a HUGE JUMP.



so whats the deal bro, we give help and/or advice, but you gotta keep it straight with us.




HOW BOUT you take some pictures of your amp and subwoofer.

-
btw, the alternator is a 120amp, and 70@ idle. Your Battery is a 26R.
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Old 13 Apr 2011, 11:50 pm
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Thumbs up Re: Battery and alternator advice

Quote:
Originally Posted by Chromenut View Post
YOUR SIG SUCKS!




lololol
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Old 14 Apr 2011, 06:12 am
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Default Re: Battery and alternator advice

Quote:
Originally Posted by SergeantPtCruiser View Post

I would do upgrades in this order.


1) Capacitor of 10 or more
2) Big 3 Up Grade
3) Deep Cell Battery Replacement
4) Second battery
5) High Output Alternator


.
If you remove the capacitor from this list I agree with it. Most people now are staying away from stiffening caps. It is not that they don't have there benefits and proper place. Most view the CONSTANT charge-discharge cycle of a cap. as an additional load on the altenator. Many feel that this leads to the early failure of an altenator.

Since this isn't a stereo forum and there may be some that have no clue to what the "big 3" is. It is the upgrade of a few key wires.

1. Battery to chassis ground.
2. Battery to engine ground.
3. Battery to altenator positive.
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  #10 (permalink)  
Old 14 Apr 2011, 06:17 am
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Default Re: Battery and alternator advice

You could also add a Missing Link module. This allows a higher voltage to go to the battery while charging. Missing Link Audio
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