Ground to battery?

[iceteebone 5,000+ posts]

There is resistance in the chassis. Think of it as a tree with thousands of branches vs. a solid sheet.

I guess I'm going to have problems because my ground is 20 feet long //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[helotaxi 5,000+ posts]

I continue to stand by my words. Grounding to the battery may work just fine, but by not grounding directly to the chassis you are just throwing a possible link of failure or problems down the road. Again this electrical 101.

Retake electrical 101, you failed. The point of zero potential in a system is ground. That isn't the chassis. It's the negative post of the battery with the car off or the case of the alternator with the car on (which if you've done even the most basic of electrical upgrades to support your system should be connected to the battery neg post by way of the engine block ground with a large gauge cable). The chassis only acts as a buss bar to simplify wiring. It's connected to ground, but it isn't always adequate depending on the amount of current that you're asking it to carry.

 

[helotaxi 5,000+ posts]

thanks for that great info... but what you said had nothing to do with what quoted
I've been searching for that article, but I can't find it again.

The article said proximity (not to be confused with continuity //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif) to the negative terminal can introduce noise into said circuit. I'll keep looking because from what I remember it was a reliable source, just can't seem to find it again

It was an article by Dave Nousaine and is based on flawed theory. He's using a tape pickup to "detect noise." All he is "detecting" is the flow of current, not noise. Of course the flow of current is highest at the battery neg, it all has to go through there. The battery is still doing its filtering job; it's still in the circuit and still wired in parallel.

In the same article he talks about using the tape head to "find a quiet ground" on the chassis. All you'll find by doing this is find a shitty ground. If there is no current flowing in that part of the chassis, there's a reason: it's not well connected to ground either because the welds holding that panel in place aren't very conductive or the matrix of the metal is flawed effectively isolating that area with a high resistance fault in the metal.

 

[mrray13 10+ year member]

It was an article by Dave Nousaine and is based on flawed theory. He's using a tape pickup to "detect noise." All he is "detecting" is the flow of current, not noise. Of course the flow of current is highest at the battery neg, it all has to go through there. The battery is still doing its filtering job; it's still in the circuit and still wired in parallel.
In the same article he talks about using the tape head to "find a quiet ground" on the chassis. All you'll find by doing this is find a shitty ground. If there is no current flowing in that part of the chassis, there's a reason: it's not well connected to ground either because the welds holding that panel in place aren't very conductive or the matrix of the metal is flawed effectively isolating that area with a high resistance fault in the metal.

and now, it's the end of the thread/

if you have anymore questions after reading helo's last two posts, go back and reread his last two posts.

very well said bro. and thanks for the info in the last post. i was curious about that.

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee //content.invisioncic.com/y282845/emoticons/peace.gif.2db28b618ed8d1964ebbe2f5021d2c39.gif

 

[AudioXtremes 10+ year member]

I stand by my words. Grounding to the battery relies on the ground of the battery to support the grounding of more electrical than it was designed to handle. It is also NOT the most direct grounding path which is electrical 101 - Make the ground as short and direct as possible. Ground to the chassis.

Please read my post. Get up from your computer, walk outside and jump in front of a truck. That way you'll stop posting useless false information.

 

[ufvj2172]

Don't ground to the battery itself. You can ground to the same location of the battery given it's a good clean connection. Otherwise make your own chassis ground as close to the install as possible.

why the hell would the FACTORY ground the battery if it wasent a "good clean connection" lol.............you make no sense thanks for playing

 

[alpinetypeR 10+ year member]

when i had my MR2 the battery was in the FRUNK...when i grounded it to the battery it allways gave me engine whine...??? why did it do this>>??

 

[helotaxi 5,000+ posts]

when i had my MR2 the battery was in the FRUNK...when i grounded it to the battery it allways gave me engine whine...??? why did it do this>>??

Because your HU ground was much worse than your amp ground and your HU partially grounded through the signal cable to your amps. That is the basis of alt whine. If the HU were likewise grounded, your noise should have gone away.

 

[UndercoverPunk 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/woot.gif.aaa6090e619a97b6090d16dd863c5a69.gif for sanity.

 

[BZA 10+ year member]

blah. thread=dead.

 

[ultimate157 5,000+ posts]

Wow natem33 is a moron. I'm currently going to school for Electrical Engineering, and apparently I'm wrong. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

Grounding to the chassis when the battery is in the trunk is completely retarded. This is only going to add extra connections that you do not need. Ever heard of the saying "The quickest route to your destination is a straight line" ?

I've had my ground wire run from my amp in the back to the battery under the hood. Did this induce so much noise that I couldn't hear the music? No, absolutely not. I had no problems running my ground straight to the battery, because thats where the grounds go anyway.

/yourself

 

[IgnoreMe 5,000+ posts]

thanks for that great info... but what you said had nothing to do with what quoted
I've been searching for that article, but I can't find it again.

The article said proximity (not to be confused with continuity //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif) to the negative terminal can introduce noise into said circuit. I'll keep looking because from what I remember it was a reliable source, just can't seem to find it again

your name fits you. you are a ****ing joke.

if you had the least bit of deductive reasoning you'd realize what i was talking about.

 

[thejoker989 10+ year member]

your name fits you. you are a ****ing joke.
if you had the least bit of deductive reasoning you'd realize what i was talking about.

I knew what you were trying to say, just letting you know it was a very useless post because it had nothing to do with what I was talking about.

 

[UndercoverPunk 5,000+ posts]

Still?

 

[IgnoreMe 5,000+ posts]

I knew what you were trying to say, just letting you know it was a very useless post because it had nothing to do with what I was talking about.

my post is useless?

let me see what you could of got from it.

1) grounding to the battery is not a bad idea

2) grounding to the chassis is the same thing as grounding to the battery neg

3) it doesnt matter if the battery is the noisiest place or not, since grounding to a chassis acts the same way as grounding directly to the "noisy" battery...