1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

gm alt question

Thread Tools
 
Search this Thread
 
Old 02-09-06, 01:46 PM
  #1  
Full Member

Thread Starter
 
jjlrx7's Avatar
 
Join Date: Feb 2003
Location: San Antonio, Texas
Posts: 164
Received 3 Likes on 1 Post
Angry gm alt question

I did the swap and nothing changed. wtf?! i used one from an 86 regal, new, cross checked part numbers and ears size, same as the 92 buick someone else used. printed out diagram and took it outside and followed it to a t. is there something wrong with my electronics? alt is good and it still sits at 12.5-13 v. and gauges seem to have a draw on them when some other eletric thing is on (headlights radio ect). when i turn the headlights on, the voltage goes up a little and the rpm also goes up? ideas please!! I need you opinions.
Old 02-09-06, 01:48 PM
  #2  
Burning Oil-Grinding 3rd

 
Hades12's Avatar
 
Join Date: Apr 2002
Location: Union Mills NC
Posts: 4,094
Likes: 0
Received 1 Like on 1 Post
What did you expect to happen?
Old 02-09-06, 01:56 PM
  #3  
Old Fart Young at Heart

iTrader: (6)
 
trochoid's Avatar
 
Join Date: Apr 2004
Location: St Joe MO
Posts: 15,145
Likes: 0
Received 7 Likes on 7 Posts
Good one. Most peoples volts and rpms go down. What's the problem? Voltage output should be reading, 14-14.5, though.
Old 02-14-06, 05:17 PM
  #4  
Full Member

Thread Starter
 
jjlrx7's Avatar
 
Join Date: Feb 2003
Location: San Antonio, Texas
Posts: 164
Received 3 Likes on 1 Post
thats the prob. it still is reading 12. maybe i should just be happy it works. thanks though.
Old 02-14-06, 06:05 PM
  #5  
Rotary Freak

iTrader: (4)
 
riceburner1r2001's Avatar
 
Join Date: Nov 2003
Location: riverside county
Posts: 1,758
Likes: 0
Received 0 Likes on 0 Posts
r the wires from the 12a motors diff from gsl-se wires. i have done the same thing and i get a small buzz from the alt. do u have to upgrade the battery too
Old 02-15-06, 04:05 AM
  #6  
Rotary Freak

iTrader: (4)
 
riceburner1r2001's Avatar
 
Join Date: Nov 2003
Location: riverside county
Posts: 1,758
Likes: 0
Received 0 Likes on 0 Posts
bump
Old 02-15-06, 06:40 AM
  #7  
B O R I C U A

iTrader: (14)
 
KNONFS's Avatar
 
Join Date: Mar 2001
Location: VA
Posts: 5,480
Received 35 Likes on 29 Posts
Originally Posted by jjlrx7
I did the swap and nothing changed. wtf?! i used one from an 86 regal, new, cross checked part numbers and ears size, same as the 92 buick someone else used. printed out diagram and took it outside and followed it to a t. is there something wrong with my electronics? alt is good and it still sits at 12.5-13 v. and gauges seem to have a draw on them when some other eletric thing is on (headlights radio ect). when i turn the headlights on, the voltage goes up a little and the rpm also goes up? ideas please!! I need you opinions.
Try adding a thicker gauge cable from the alternator post to the battery, 10G should do the trick
Old 02-15-06, 06:47 AM
  #8  
Rotary Freak

iTrader: (4)
 
riceburner1r2001's Avatar
 
Join Date: Nov 2003
Location: riverside county
Posts: 1,758
Likes: 0
Received 0 Likes on 0 Posts
does anyone no if the wires r the same for a 12a 13b. meaning i have a 85 se and get a small buzz from the new alternator this is with the 2 wire hook up as they say to do but 1 is just sitting there. and what would 10g do by chance. and do u have to go to a bigger battery with this kind of mod
Old 02-15-06, 07:01 AM
  #9  
Super Moderator

iTrader: (3)
 
gsl-se addict's Avatar
 
Join Date: Jan 2003
Location: Lynchburg, VA
Posts: 5,088
Likes: 0
Received 11 Likes on 11 Posts
The wiring would be the same with the SE. From 80-88, all RX-7s used the same alt wiring. You don't need to upgrade the battery. The alt is just capable of producing more current than stock. The heavy gauge wiring just eliminates using the old stock wiring and creates less voltage drop between the alt and the battery. I used 8 ga. on my SE with the S5 alt.

When you guys check your voltage, what are you using? I know the voltmeter on my car reads about 1 volt low. You need to use a voltmeter/lmultimeter to really test it.
Old 05-09-06, 08:29 PM
  #10  
Full Member

Thread Starter
 
jjlrx7's Avatar
 
Join Date: Feb 2003
Location: San Antonio, Texas
Posts: 164
Received 3 Likes on 1 Post
i still have the same batt and i will go a head and get bigger wire.
Old 05-09-06, 08:37 PM
  #11  
Thunder from downunder

iTrader: (1)
 
aussiesmg's Avatar
 
Join Date: Mar 2001
Location: Convoy, Ohio, USA
Posts: 3,843
Likes: 0
Received 1 Like on 1 Post
This isn't a performance mod, it gives you more electrical ability to operate accessories. You should be able to run a big stereo, A/C, spot/fog lights, DVD etc without drawing too much power.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
_Tones_
Adaptronic Engine Mgmt - AUS
10
05-25-21 05:37 AM
Nosferatu
2nd Generation Specific (1986-1992)
7
09-05-15 02:13 PM



Quick Reply: gm alt question



All times are GMT -5. The time now is 06:24 AM.