When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Does anyone have direction on how to do this on an LS4?
Specifically I'm asking as I'm aware that there is a current sensor that makes our alternates variable output (I cannot recall whether it's on the ground or power cable).
Does this alter how one would perform the big 3/4 upgrade on an LS4 or would it be like any other car?
Does anyone have direction on how to do this on an LS4?
Specifically I'm asking as I'm aware that there is a current sensor that makes our alternates variable output (I cannot recall whether it's on the ground or power cable).
Does this alter how one would perform the big 3/4 upgrade on an LS4 or would it be like any other car?
Feedback is appreciated.
Thank you,
Mike
The big 3 is just running larger wires for you ground and power. I did this by making my own cables, and crimping them myself so i could get the correct lengths.
For the power:
1. I ran a 0 gauge wire from the alternator to the starter post. (There is already an existing one that is roughly 4 gauge, I left it installed)
2. I ran a 0 gauge wire from the starter to the battery. (Make sure this goes through the current sensor, if you want to get fancy you can make a 0 gauge run from the battery to a distribution block, and make sure the current sensor is on this 0 gauge run, and then distribute the power from there)
Ground:
1. Next to the battery there is a ground wire that goes to the frame next to the headlight, I removed this ground and upgraded it to 0 gauge.
2. I added a 0 gauge ground wire to one of the bolts on the alternator bracket (engine ground)
3. There is another ground wire that I left alone, the 0 gauge wire to the alternator bracket, and the one to the frame is plenty.
jeez... there is no end to the mods I have to do this is crazy... now I have to do this because I do plan on putting in a sub and amp... eventually. Bigger cables look good and strong, awesome.
1. Use welding cable
2. Buy a distribution block or post
3. Run wire from the alternator to battery / fuse box to battery / reuse the stock power cable that goes to the starter and attach that to the block as well.
For grounds you can utilize the factory ground but add one to the alternator bracket utilize a one of the 15mm bolts that go into the side of the head. I also have one on that artery body as well.
1. Use welding cable
2. Buy a distribution block or post
3. Run wire from the alternator to battery / fuse box to battery / reuse the stock power cable that goes to the starter and attach that to the block as well.
For grounds you can utilize the factory ground but add one to the alternator bracket utilize a one of the 15mm bolts that go into the side of the head. I also have one on that artery body as well.
Stock setup has a 4G or something wire going from alternator + through the wire harness down through to the Starter + where also there hooked up is the main battery + cable... I suspect this could be left on to probably no advantage since 0G is throughout....
1) 0G wire from chassis to battery -
2) 0G wire from alternator ground post to battery -
3) 0G wire from battery - to engine block ground shown below as G113 ... (leave any factory grounds active but clean/sand them)
Last edited by Red_Zone; Nov 23, 2016 at 02:15 PM.
Question, I'm doing this upgrade now but I need to know which wires go through the battery current sensor? and which way I should point it?
edit- So I noticed by watching some YouTube videos that the sensor has the fuse box and the positive wire in the loop for the Monte /impalas but the gxp looks like it's with the one negative wire, not the closest ground on the top of the frame. So I'm assuming it can be placed in either position?
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Big 3/4 Wiring Upgrade - LS4 
