Higher amp alternator? - Lateral-g Forums

J-440 · #1 12-03-2017, 11:23 AM

FAST has me running 2 positive connectors and 2 negative connectors to the battery. I also have 4 connections coming from the alternator. 2 for FAST, 1 from the alternator plug to the alternator post, and then I have a 4 gauge going to the starter.
Only thing I don't have is running the 4 gauge alternator wire to the battery per the Powermaster instructions, and a ground from the battery to the body. My car is a unibody and I do have the battery grounded to the frame.

**GregWeld** · #2 12-03-2017, 11:45 AM

Quote:

Originally Posted by J-440

FAST has me running 2 positive connectors and 2 negative connectors to the battery. I also have 4 connections coming from the alternator. 2 for FAST, 1 from the alternator plug to the alternator post, and then I have a 4 gauge going to the starter.
Only thing I don't have is running the 4 gauge alternator wire to the battery per the Powermaster instructions, and a ground from the battery to the body. My car is a unibody and I do have the battery grounded to the frame.

That sounds goofy as all get out right there!

In all my days -- I've only ever seen ONE 12V+ and ONE 12V- POWER to the battery.... all else marked GND or 12V+ are connected to engine ground or to a relay or somewhere - but I've never heard or read where there should be more than just the power source connected to the battery. Of course -- it's so hard to diagnose what's going on without being there and seeing first hand etc -- but I'd certainly be checking your power connections and making certain you've done that part of the installation correctly.

J-440 · #3 12-03-2017, 01:21 PM

Sent a text to the FAST forum to find out exactly what these wires to the battery are for. The instructions don't specify.
Could the starter post be faulty which is why the battery is not receiving the full 14 volts since the alt is connected there?

**GregWeld** · #4 12-03-2017, 01:27 PM

Quote:

Originally Posted by J-440

Sent a text to the FAST forum to find out exactly what these wires to the battery are for. The instructions don't specify.
Could the starter post be faulty which is why the battery is not receiving the full 14 volts since the alt is connected there?

Thought you said you had 14.2 at alternator -- and 13.9 at the battery..... nothing wrong with that. Battery will only "accept" so much voltage -- and 13.9 is fully charged so it's not going to take the full 14.2 the alternator is putting out.

J-440 · #5 12-03-2017, 01:31 PM

Ok...I ran a 1 gauge wire from the alternator positive side to the battery and only picked up .2 volts. My ECM is still reading 10.9 with all the accessories on and the car idling.
I'm not going to bother running that 1 gauge to the battery for only .2 extra volts. Any other ideas?