Big 3 question

[Ridinhi 5,000+ posts]

How important is it for the ground from block to chassis? I got a big 3 kit (ofc) and have been installed battery to alternator and battery ground to chassis. At the time I installed it, I got lazy and never installed the second ground which would be from block to frame/chassis. How important is this ground? Ive got good voltage but when full tilt, I can drop down to 10-11 volts. I run a steady 14.5 and even up to 14.8 at idle. I have a diehard agm and an after market 200 amp alternator. Plan is to upgrade alternator to 320 amp. Amps are Ct Sounds 2000.1 and Nvx vad8402.

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[winkychevelle 10+ year member]

Only one I haven't done yet is batt to chassis, I've done my batt to engine block. But I've got dual batts under hood with dual factory batt to chassis grounds. I just don't feel like drilling into my frame right now to do the batt to frame runs.

Maybe when I take off my front bumper to replace the airbag sensor I'll do it.


To answer your question that's the 1 ground that completes the circuit from alt positive through load back to alt negative so I'd say it's fairly important

 

[Ridinhi 5,000+ posts]

Only one I haven't done yet is batt to chassis, I've done my batt to engine block. But I've got dual batts under hood with dual factory batt to chassis grounds. I just don't feel like drilling into my frame right now to do the batt to frame runs.

Maybe when I take off my front bumper to replace the airbag sensor I'll do it.


To answer your question that's the 1 ground that completes the circuit from alt positive through load back to alt negative so I'd say it's fairly important

seems when weather coperates, that will be a priority to get done! Thanks.
you ever get that NVX box built?

 

[1aespinoza Premium Member]

just don't feel like drilling into my frame right now to do the batt to frame runs.

I have mine grounded with the bolts that hold the engine splash shield. 99 Silverado.

 

[ThxOne Premium Member]

My grounds are typically Battery to Alt Bracket, Engine Block to Frame, Battery to Frame.

 

[Ridinhi 5,000+ posts]

My grounds are typically Battery to Alt Bracket, Engine Block to Frame, Battery to Frame.

Im definitely going to add block to frame ground! If I have enough wire Ill even do battery to block/alternator bracket

 

[ThxOne Premium Member]

Im definitely going to add block to frame ground! If I have enough wire Ill even do battery to block/alternator bracket

I figure, the more grounds the better. If one loosens up you have a few more to fall back on.

 

[Water Bear]

How important is it for the ground from block to chassis? I got a big 3 kit (ofc) and have been installed battery to alternator and battery ground to chassis. At the time I installed it, I got lazy and never installed the second ground which would be from block to frame/chassis. How important is this ground? Ive got good voltage but when full tilt, I can drop down to 10-11 volts. I run a steady 14.5 and even up to 14.8 at idle. I have a diehard agm and an after market 200 amp alternator. Plan is to upgrade alternator to 320 amp. Amps are Ct Sounds 2000.1 and Nvx vad8402.

I have a kind of unscientific test for grounds. If you take a wire and just temporarily touch it to the block and frame and you see a spark, that means there was some voltage difference between the two. You want everything to be at the same ground potential, so tying them together would do good things for any electronics using the frame as a ground.

If you don't notice any noise or other problems (sounds like you don't) I'd say you're fine and just leave it.

 

[winkychevelle 10+ year member]

seems when weather coperates, that will be a priority to get done! Thanks.
you ever get that NVX box built?

Probably not gonna get started on that till after the new years really end of February. Working 40hr work weeks right now makes money very tight especially for the holidays. 84hr work weeks come January means double money. I do still plan on building that box and kick myself for not getting the subs during Black Friday. They would've been basically buy 1 get one half off.

Taking care of maintenance on the truck and probably gonna go ahead and do a ho alt is a pretty high priority. Damn dieseld are expensive. Good thing is 2 truck notes left so no note come January.