Chassis grounds vs gounding batteries together

[KnOkIn It 420 10+ year member]

Will there be a big difference between gounding my rear battery(kinetik 2000) to the chassis rather than running a second run of 1/0 for a ground.

Discuss.

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[mokedaddy 5,000+ posts]

Depends on the vehicle and the amount of current you are drawing.

 

[mile098 10+ year member]

may lead to a ground loop problem due to the difference in potential

 

[97cavy 10+ year member]

Food for thought:

I was at a show ealier this year. I was having some wierd charging problems. My front battery was reading 14.4 charging. I have 1 run of POS and 1 run of NEG back to the rear bank of 5 NSB 125's. The nsb's were only charging at like 12.8.

I went over everything, unhooked all the batteries and could still not figure out why my back bank of batteries was so low. We put a ground to the seat belt bolt (not the GREATEST ground, but better then nothing) and BAM charging at 14.4 at the rear bank

 

[helotaxi 5,000+ posts]

You had a bad connection on 1/0 ground. You'd have to be drawing in excess of 900A to get that much of a voltage drop on a single run of 1/0 unless you had a bad connection.

 

[97cavy 10+ year member]

I swapped the power and ground thinking i just had a bad connection, and have the same results. I had a few SPL guys help me, and after a few hours of testing, we tryed the rear ground and everything worked fine from there on out

 

[helotaxi 5,000+ posts]

The math says 900A or a bad connection. Those are the choices. The Big-3 counts into your connections as well. Chances are good that's where your bad connection was.

 

[audiolife 5,000+ posts]

The math says 900A or a bad connection. Those are the choices. The Big-3 counts into your connections as well. Chances are good that's where your bad connection was.

x2.

 

[KnOkIn It 420 10+ year member]

Could I get away with running both batteries in the front?

 

[vehementSPL 10+ year member]

Well I think it is more of a "noise" issue. A few people have argued that front run gives better ground. But it is only grounded to the frame with small wire. I personally like going strait to the frame in the rear. I am pretty sure scottie johnson does the same thing. Last time I checked he was running over 200,000 watts for a burp.

 

[audiolife 5,000+ posts]

Well I think it is more of a "noise" issue. A few people have argued that front run gives better ground. But it is only grounded to the frame with small wire. I personally like going strait to the frame in the rear. I am pretty sure scottie johnson does the same thing. Last time I checked he was running over 200,000 watts for a burp.

lot of db drag vehicles ground it both ways at the same time......a street a car can have 16++ runs of 0 ga..........