external voltage regulator? - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 27 (permalink) Old 09-25-2011, 11:18 AM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
external voltage regulator?

I've seen a couple on here have done it, but with no real good direction to which one should be used. I have a moderate audio system installed. I'd like to get the load out of the PCM and use an external voltage regulator. I need to tear into this thing for a good week or so to do some engine work, struts, brakes, ect. The alternator is getting replaced so I want this to be done at the same time.

I don't need step by step directions, just a general point into what external regulator should be used.
Dirdy is offline  
Sponsored Links
Advertisement
 
post #2 of 27 (permalink) Old 09-25-2011, 12:26 PM
Intrepid Modder
 
Join Date: Aug 2007
Location: Peru, IN
Posts: 715
Feedback: 0 / 0%
                     
do i live under a rock? why do you need a voltage regulator? if you're worried that the system is hogging too much power, get a bigger alternator, add another battery, get a bigger capacitor, or any combination of the three.

what do you mean by moderate? mine is just over 400w rms and everything under the hood is stock and only have a 1/2 farad capacitor.

Last edited by ksa8907; 09-25-2011 at 12:29 PM.
ksa8907 is offline  
post #3 of 27 (permalink) Old 09-25-2011, 01:01 PM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
Because it is my understanding that the factory regulator is built into the PCM. And if you constantly push it hard you run the chance of burning that up. And I'm already looking into replacing with a slightly larger alternator, adding or up-sizing power and grounds, better battery.

I just want a reliable, constant voltage from the alternator. The factory regulator, even with subs off, doesn't seem to do that.
Dirdy is offline  
Sponsored Links
Advertisement
 
post #4 of 27 (permalink) Old 09-25-2011, 01:06 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 48,852
Feedback: 44 / 100%
                     
Quote:
Originally Posted by Dirdy View Post
Because it is my understanding that the factory regulator is built into the PCM. And if you constantly push it hard you run the chance of burning that up.
Where did you "hear" that BS?
Ronbo is offline  
post #5 of 27 (permalink) Old 09-25-2011, 01:44 PM
Intrepid Pro
 
jradams350's Avatar
 
Join Date: Oct 2007
Location: 38663
Posts: 10,378
Feedback: 4 / 100%
                     
Quote:
Originally Posted by ronbo View Post
where did you "hear" that bs?
x2...
jradams350 is offline  
post #6 of 27 (permalink) Old 09-26-2011, 03:11 PM
Intrepid Modder
 
Join Date: Aug 2007
Location: Peru, IN
Posts: 715
Feedback: 0 / 0%
                     
for every 500w rms you need at least 1/2 farad of capacitance. as long as you're not using the an output from the PCM to power your subs(you'd be a complete idiot to try, and i promise it wouldn't last 5 seconds) you're fine, the two systems are independent of each other. if your voltage at the battery drops below 12.5 volts while the amp is on, get a bigger alternator or a smaller sound system.

there's a reason people who run huge systems have multiple alternators.
ksa8907 is offline  
post #7 of 27 (permalink) Old 09-27-2011, 05:21 AM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
Its not a huge system. A 500w Rockford amp with 2 12" subs. The amp is just a little undersized so I push it near the limit a lot. I know I need a better battery.

My lights dim whenever I do anything in the car. I hit the brakes and flip the turn signal on and they go dim, bright, dim, bright. Same if I roll a window up or down or have the rear defrost on, ect. The current alternator charges fine, cables are excellent, and the battery reads about 13.4 to 13.7 while running with nothing else on, and a little over 12 after being off for a couple days. So, unless there is something else I'm overlooking...

Also, shouldn't I be able to run around 14.3 volts? I know that little bump can make a huge difference. I used to change regulators out on my Fords to get higher charge voltage.
Dirdy is offline  
post #8 of 27 (permalink) Old 09-27-2011, 10:13 AM
Intrepid Pro
 
EagleESI's Avatar
 
Join Date: Oct 2005
Location: Chatt, TN
Posts: 4,279
Feedback: 3 / 100%
                     
Since nobody asked this important question. What kind of Battery are you using?
EagleESI is offline  
post #9 of 27 (permalink) Old 09-27-2011, 12:28 PM
Intrepid Pro
 
sc.intrepid's Avatar
 
Join Date: Aug 2004
Location: Charleston, SC
Posts: 4,600
Feedback: 5 / 100%
                     
I found the section in the FSM(sect. 8F-17) that talks about how battery charging works in our cars very informative. The PCM looks at a few sensors, calculates some things and tries to keep battery voltage between 13.5 and 14.7. I also read that if the PCM doesn't see one of the key inputs it looks for in the charging system that it will set a DTC.
sc.intrepid is offline  
post #10 of 27 (permalink) Old 09-27-2011, 01:02 PM
get off my lawn

 
DrDodge's Avatar
 
Join Date: Jan 2006
Location: Smyrna , Tn
Posts: 15,502
Feedback: 6 / 100%
                     
I really think, a good heavy battery and doing the Big 3 will handle your problems, maybe a bigger alt,
DrDodge is offline  
post #11 of 27 (permalink) Old 09-28-2011, 06:48 AM
Intrepid Pro
 
mnitetrain's Avatar
 
Join Date: Nov 2003
Location: s/e ma
Posts: 13,687
Feedback: 2 / 100%
                     
Chrome alternator FTW. Love that extra flash.
mnitetrain is offline  
post #12 of 27 (permalink) Old 09-28-2011, 08:30 AM
Intrepid Modder
 
Join Date: Aug 2007
Location: Peru, IN
Posts: 715
Feedback: 0 / 0%
                     
have to agree with what is being said, bigger battery, no less than 700cca, and a 1 farad capacitor.

do you currently have a capacitor?
ksa8907 is offline  
post #13 of 27 (permalink) Old 09-30-2011, 05:00 PM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
Found one that will work.

I'm going to grab one of those AGM Duralast batts from Autozone here soon. My current batt is some cheap crap 500ca. Its got some leakage, but still shows good numbers after sitting.

I don't have a capacitor for my system yet. The audio wasn't priority here, just keeping charging consistent. I do plan on one here soon. But, I did find my high cooling fan is locked up. So I'd assume it would be causing some high current draw when it tries to turn on.

I found I can use a Transpo C8313 adjustable regulator and wire it in fairly easy. And already planned the "Big 3", as some call it. I just want to eliminate the lower voltages when something is on. I know bumping the voltage .5 to 1 volt will help me. I'm not new to electrical, just to Chrysler's set-up.

All grounds and wires look great. I replaced the positive terminal a while ago with a larger, brass audio one. I also realize the current alternator could just be going bad without making noise, heating up, or not charging.

Thanks for all the help
Dirdy is offline  
post #14 of 27 (permalink) Old 09-30-2011, 08:22 PM
Intrepid Pro
 
Join Date: Feb 2002
Location: Virginia, U.S.
Posts: 16,188
Feedback: 4 / 83%
                     
You can bump your voltage that amount by installing a diode in series with one of the PCM power wires. Cheaper than a regulator.
peva is offline  
post #15 of 27 (permalink) Old 09-30-2011, 08:32 PM
Intrepid Pro
 
EagleESI's Avatar
 
Join Date: Oct 2005
Location: Chatt, TN
Posts: 4,279
Feedback: 3 / 100%
                     
I like how your complain about dimming lights and everything, then you finally come out and tell us that you have a crap battery, leaking at that. 500ca is not much now and days as well. You haven't done the big three upgrades.

No wonder your lights are dimming. I have a Red Top Optima, Upgraded Grounds, a 200watt RMS Class D mono Amp pushing a 12, and a 40x4 rms EQ amp pushing 6 speakers, and at night with fogs and headlights on, my fans can kick on and my lights will not dim while listening to music. And the biggest part, I only have a 90 amp Alternator.

By the way, you can overcharge a battery btw. Having the proper equipment, done right, you shouldn't have charging issues.

EagleESI is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionaly, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome