• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Something strange after 3G install

  • Thread starter Thread starter STP72
  • Start date Start date Jun 11, 2009
S

STP72

New Member
Nov 11, 2006
109
0
0
Jun 11, 2009
#1
  • Jun 11, 2009
  • #1
I did my 3G upgrade last weekend, And after driving the car all week I feel as if the car runs alot better now. Did anyone notice the same thing or is it just me haha
 

Vinnietbird

Member
Jun 2, 2005
584
3
19
Jun 11, 2009
#2
  • Jun 11, 2009
  • #2
I remember feeling the difference as well when I did my 3G upgrade a few years ago.The whole car is run by electrical power,and the 3G supplies it,making everything run more efficient using the power it needs.Nothing is starving for leftover juice.
 

LiquidGT

Member
Oct 8, 2007
368
0
16
Near STL hell
Jun 11, 2009
#3
  • Jun 11, 2009
  • #3
Now that I think back, I remember my car running smoother also... all of the electrical components are getting the power that they should. With the extra juice adding some 4ga grounds on the engine is a good idea too.
 
S

STP72

New Member
Nov 11, 2006
109
0
0
Jun 11, 2009
#4
  • Jun 11, 2009
  • #4
I added a 4g ground from battery neg to the ground on the rad saddle. Is this good enough?
 

TenorPlayinGuy

Founding Member
Aug 3, 2001
1,208
0
36
Canyon Country, Ca
Jun 11, 2009
#5
  • Jun 11, 2009
  • #5
Yep, that 3G definitely made it clear where all my shorts were! After I fixed all the blown circuits she ran like a BEAST! Glad I made that install. Not to mention it's a more efficient and better running design alltogether
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Jun 12, 2009
#6
  • Jun 12, 2009
  • #6
STP72 said:
I added a 4g ground from battery neg to the ground on the rad saddle. Is this good enough?
Click to expand...

The secondary power ground is between the back of the
intake manifold and the driver's side firewall. It is often missing or
loose. It supplies ground for the alternator, A/C compressor
clutch and other electrical accessories such as the gauges.
Any car that has a 3G or high output current alternator needs
a 4 gauge ground wire running from the block to the chassis
ground where the battery pigtail ground connects.

The 3G has a 130 amp capacity, so you wire the power side
with 4 gauge wire. It stands to reason that the ground side
handles just a much current, so it needs to be 4 gauge too.

The picture shows the common ground point for the battery & extra 3G
alternator ground wire as described above in paragraph 2. A screwdriver
points to the bolt that is the common ground point.
The battery common ground is a 10 gauge pigtail with the computer ground
attached to it.

Picture courtesy timewarped1972
 
You must log in or register to reply here.

Similar threads

Electrical Alternator not charging after terminator 2 install.
  • Sfab79
  • Aug 24, 2025
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
41
Views
2K
Fox 5.0 Mustang Tech Aug 21, 2026
Qtrhrse23
Engine Keeping O2 sensors lit with long tube headers
  • keel
  • Jul 30, 2026
  • Fox 5.0 Mustang Tech
Replies
4
Views
268
Fox 5.0 Mustang Tech Aug 21, 2026
Qtrhrse23
L
Engine 85 GT Excessive Idle
  • lutzkecj
  • Sep 18, 2026
  • Fox 5.0 Mustang Tech
Replies
5
Views
358
Fox 5.0 Mustang Tech Sep 21, 2026
86HO5.0
8
Engine Looking for suggestions and or ideas
  • PonyGTrider
  • Aug 25, 2026
  • Fox 5.0 Mustang Tech
Replies
17
Views
682
Fox 5.0 Mustang Tech Sep 7, 2026
PonyGTrider
K
Resolved Weird sound coming from a freshly rebuilt 5.0L
  • karhoot
  • Jun 24, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
383
Fox 5.0 Mustang Tech Jun 27, 2026
Mac131
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?