Introduction to the NBS Big 3 Upgrade
The NBS Big 3 electrical upgrade is a modification aimed at improving the electrical system’s performance by adding larger gauge wires. This upgrade is designed to enhance current flow and reduce voltage sag, which can lead to dimming headlights and other electrical issues.
Purpose and Benefits
The primary goal of the Big 3 upgrade is to diminish voltage sag by improving current flow. This upgrade is not a replacement for the factory wiring but an addition to it. Users report that the upgrade helps reduce dimming headlights, although it is not a cure-all solution. Other recommended upgrades include deep cycle batteries (like Optima Yellow Top) and high-output alternators.
Supplies and Costs
The supplies needed for the Big 3 upgrade include:
- Battery positive to alternator (approx. 4 feet)
- Battery negative to chassis (approx. 4 feet)
- Engine block to chassis (approx. 5 feet)
- 4 ring terminals
- Heatshrink to cover ring terminals
- Flex loom (optional)
The estimated cost of supplies ranges from $50 to $100, depending on wire size, color, and connector type. Users suggest using welding wire for a cheaper option if appearance is not a concern.
Installation Details
The installation involves connecting the battery positive to the alternator, the battery negative to the chassis/frame, and the engine block to the chassis/frame. Users recommend using Audiopipe battery terminals, Stinger HPM Series 0 gauge wire, and Stinger Expert Series 0 gauge ring terminals. Some users opt for 1/0 gauge wire for better aesthetics.
Community Experiences
Several users have reported positive experiences with the Big 3 upgrade. For example, one user noticed their headlights dimming less after the upgrade. Another user reported a voltage reading of 13.6 volts instead of the usual 12.3 volts, and their subwoofer no longer produced a big thump when shutting off the truck. Users also noted improvements in fuel efficiency, with some reporting an increase of about 1.5 miles per gallon on the highway.
Alternatives and Considerations
Users have discussed the possibility of using Stinger side terminals to replace factory wires, but it is generally not recommended due to the factory loom’s design. Elemental Designs offers Big 3 upgrade kits as an alternative option.