5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Alternator

Old 11-09-2006, 02:14 AM
  #1  
FordMustangXBA
4th Gear Member
Thread Starter
 
FordMustangXBA's Avatar
 
Join Date: Mar 2006
Location: Connecticut
Posts: 1,092
Default Alternator

So, my battery keeps dying. I need a new alternator. I have pulleys on the car, as well as an 1100watt amp, pushing 2 10" subs. My voltage meter reads like 9 volts when the car is running, even at 2000 rpms. My headlights are always dim, and sometimes i can't run the heater and the amp at the same time. What's my best bet? I found 130 amp alternators on ebay, for 189 bucks a piece. Is that a good deal? Is there a better method to this?

Not only that, but this crap cost me a windshield. I had to jump my car in the rain, and in my haste to get back into the car I forgot my damned hood pins! Ouch!
FordMustangXBA is offline  
Old 11-09-2006, 02:23 AM
  #2  
Ecstasy
5th Gear Member
 
Ecstasy's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 2,601
Default RE: Alternator

well, you can goto summit and get a powermasters 140 amp alternator, there 2g so you wont have to modify your alternator bracket & just dont use the underdrive alternator pulley, you wont notice a diff anyways, use the pulley that comes on it. the pm amps are actually rated higher then 140 though, when i got mine, it was rated at 153, and same with grabbem's. its awesome because its only a 1 wire alternator. most of your drag comes from your crank and the other comes from the water, hardly any drag from the alternator pulley so you really wont notice a performance diff by using the stock alt. pulley.
Ecstasy is offline  
Old 11-09-2006, 03:24 AM
  #3  
Leeiswho2b
2nd Gear Member
 
Leeiswho2b's Avatar
 
Join Date: Apr 2006
Location:
Posts: 176
Default RE: Alternator


ORIGINAL: FordMustangXBA

So, my battery keeps dying. I need a new alternator. I have pulleys on the car, as well as an 1100watt amp, pushing 2 10" subs. My voltage meter reads like 9 volts when the car is running, even at 2000 rpms. My headlights are always dim, and sometimes i can't run the heater and the amp at the same time. What's my best bet? I found 130 amp alternators on ebay, for 189 bucks a piece. Is that a good deal? Is there a better method to this?

Not only that, but this crap cost me a windshield. I had to jump my car in the rain, and in my haste to get back into the car I forgot my damned hood pins! Ouch!
OK, for starters, your 1100 watt amp should be fine with the stock alt unless it has just crapped out. I wouldn't buy the cheap high output alts on ebay because all I hear are they're junk from my car audio forum. An easy and inexpensive upgrade to an audio system is the "Big 3." Run 3 different runs of 1/0 awg wire as follows:

1. Alternator Positive to Battery Positive.
2. Battery Negative to Chassis
3. Chassis to Engine Block

I will almost guarantee this will solve any charging/dimming issues you may have!!!!!!!
Leeiswho2b is offline  
Old 11-09-2006, 04:33 AM
  #4  
FordMustangXBA
4th Gear Member
Thread Starter
 
FordMustangXBA's Avatar
 
Join Date: Mar 2006
Location: Connecticut
Posts: 1,092
Default RE: Alternator

Alrighty, I'll check that out. Thanks. I don't know, though, cause I've had slight charging issues since getting the car. The voltage meter has always read a little on the low side.
FordMustangXBA is offline  
Old 11-09-2006, 04:34 AM
  #5  
dimebag
6th Gear Member
 
dimebag's Avatar
 
Join Date: May 2006
Location: earleville md
Posts: 10,357
Default RE: Alternator

just a lil fyi... our stock guages suck... i wouldnt trust it 100%
dimebag is offline  
Old 11-09-2006, 04:47 AM
  #6  
redmustang83596
4th Gear Member
 
redmustang83596's Avatar
 
Join Date: May 2005
Location: Chitown
Posts: 1,116
Default RE: Alternator

are you sure the alternator is shot? When the car is running just pull off a battery terminal, if the car shuts off, your alt is shot. If you get anything, just dont get the one wire upgrade, i got that and the car ran like ****, switched back to stock style and it worked just great.
redmustang83596 is offline  
Old 11-09-2006, 04:56 AM
  #7  
Ecstasy
5th Gear Member
 
Ecstasy's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 2,601
Default RE: Alternator

thats false i have the 1 wire upgrade and ive never had any issues with mine. the only wire you change is the charge wire.


[IMG]local://upfiles/26824/84E20B3580D14656904493548AB5B4A1.jpg[/IMG]
Ecstasy is offline  
Old 11-09-2006, 05:05 AM
  #8  
86GT 93LX
5th Gear Member
 
86GT 93LX's Avatar
 
Join Date: Oct 2006
Posts: 2,424
Default RE: Alternator

thats typical fox stang issues they all tend to do this
ORIGINAL: FordMustangXBA

Alrighty, I'll check that out. Thanks. I don't know, though, cause I've had slight charging issues since getting the car. The voltage meter has always read a little on the low side.
86GT 93LX is offline  
Old 11-09-2006, 09:51 PM
  #9  
PONY GUY
4th Gear Member
 
PONY GUY's Avatar
 
Join Date: Aug 2006
Location: Cape May County, NJ
Posts: 1,097
Default RE: Alternator

I ogt a 100amp GM 1 wire And it works great. All I had to do is do a littel drilling and mount it and hook up the charging wire from the alt to the battery
PONY GUY is offline  
Old 11-09-2006, 10:09 PM
  #10  
dillon1340
4th Gear Member
 
dillon1340's Avatar
 
Join Date: Sep 2005
Location: South Carolina
Posts: 1,041
Default RE: Alternator

got a one wire too and it works fine. did put a capicitor in for my amp though. so the headlights wouldn't dim and fuel pump wouldn't bog when the subs are loud....
dillon1340 is offline  

Thread Tools
Search this Thread
Quick Reply: Alternator



All times are GMT -5. The time now is 03:49 PM.