|
Re: GROUND WIRE QUESTION....................
[Re: Cab_Burge]
#1372339
01/20/13 01:18 AM
01/20/13 01:18 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
I have been trying to do a survey but I can't get it to work 
My question is how many on here know which way the current flows out of a battery?
Please make your choice by making it either #1, current flows out of the battery from the positive post through the car to the negative post or #2 Current flows out of the battery from the negative post through the car back to the positive post  
I'll look at this later tonight and again tomorrow morning and then post the correct answer tomorrow after the last responce   
I already know.... whats that got to do with this?
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: Thumperdart]
#1372342
01/20/13 03:19 AM
01/20/13 03:19 AM
|
Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
|
I Win
Joined: Jan 2003
Posts: 32,394
|
Quote:
Quote:
No better ground than the frame. Bolt to your rear subframe. It's welded to frame connectors which are welded to the front frame rails. If you've got a problem with a ground then you've got worse things to think about. You won't find a ground to the front in a new Charger or Challenger that have the battery in the rear. Trust me, new cars have way more electrical issues to deal with than a simple car like what we both race. In case your wondering, I work in the Electrical lab at Chrysler Tech Center.
Doug
I know that most of the new cars I work on have several grounds through out the wiring and every so many feet also to help even more w/all of the on board electronics. I`ll run a #10 from the batt to bulkhed which the MSD is also directly grounded to which can`t hurt and I believe the MSD instructions suggest iirc. 
correct MSD tells you to ground directly to the batt not the chassis. I had a long conversation with an MSD rep about this years ago.
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: Quicktree]
#1372343
01/20/13 03:20 AM
01/20/13 03:20 AM
|
Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
|
I Win
Joined: Jan 2003
Posts: 32,394
|
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: J_BODY]
#1372348
01/20/13 12:18 PM
01/20/13 12:18 PM
|
Joined: May 2006
Posts: 1,260
New Mexico
Adobedude
pro stock
|
pro stock
Joined: May 2006
Posts: 1,260
New Mexico
|
It's too easy not to run a cable from the - side of the battery to a ground block and branch off of that...When a electical problem pops up I know it's not a bad/loose ground, I can see everyone of them and they are all labeled. IMO electical gremlins are the hardest to chase down so I like to keep it easy. Here's my finished panel. Fan and fuel pump relays are close to the source but still ground back to the battery. http://i1180.photobucket.com/albums/x404/Adobedude43/Shifter1.jpg
2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: Adobedude]
#1372349
01/20/13 12:29 PM
01/20/13 12:29 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
It's too easy not to run a cable from the - side of the battery to a ground block and branch off of that...When a electical problem pops up I know it's not a bad/loose ground, I can see everyone of them and they are all labeled.
IMO electical gremlins are the hardest to chase down so I like to keep it easy.
Here's my finished panel. Fan and fuel pump relays are close to the source but still ground back to the battery.
http://i1180.photobucket.com/albums/x404/Adobedude43/Shifter1.jpg
Yes its easy to do that... but when I was working
our goal was to to ALWAYS get weight down in a car...
and we always tried to get a bracket(or anything)
to do 2 or more jobs.. in other words you dont have
2 brackets doing 2 jobs instead of one... the chassis
is there... its now a wire also besides being a chassis
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: dizuster]
#1372350
01/20/13 12:53 PM
01/20/13 12:53 PM
|
Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
|
I Win
Joined: Jan 2003
Posts: 32,394
|
Quote:
Cab... are you asking which way CURRENT flows out of a battery, or which way ELECTRON's flow out of a a battery. They are equal but opposite in answer...
As for the ground disucsion... I think many people believe going through the chassis is a bad way to ground because they've had trouble with the interface between the wire and the chassis. Corroded wire to chassis will obviously cause an issue. But that is no fault of the chassis as a ground, that is just a poor connection (which can happen with direct wire also). The chassis ability to carry the ground is perfectly fine as long as you do a good job connecting the wire to the chassis.
If current won't flow through a welded steel part, you have some serious issues with the weld quality... lol
ok will current flow through a piece of steel or a copper wire better?
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: dvw]
#1372352
01/20/13 12:57 PM
01/20/13 12:57 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Question, how much current can you pass through a piece of 1 5/8" tubing?
Doug
I would say ALOT more than anything on a car can handle..
the starter is the biggest draw there is on a car
and that isnt a constant
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: MR_P_BODY]
#1372353
01/20/13 12:59 PM
01/20/13 12:59 PM
|
Joined: Mar 2006
Posts: 9,846
MI, usa
dvw
master
|
master
Joined: Mar 2006
Posts: 9,846
MI, usa
|
Quote:
Quote:
Question, how much current can you pass through a piece of 1 5/8" tubing?
Doug
I would say ALOT more than anything on a car can handle..
the starter is the biggest draw there is on a car
and that isnt a constant
Exactly
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: dvw]
#1372354
01/20/13 01:38 PM
01/20/13 01:38 PM
|
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
|
top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
|
I find all this to be a very interesting!  You can never learn to much! But what I like best of all about it,no finger pointing,no name calling,just everyone stating what they believe & think is right! 
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
|
|
|
Re: GROUND WIRE QUESTION....................
[Re: Thumperdart]
#1372356
01/20/13 01:59 PM
01/20/13 01:59 PM
|
Joined: Feb 2011
Posts: 1,454
Glendora Ca.
Just-a-dart
pro stock
|
pro stock
Joined: Feb 2011
Posts: 1,454
Glendora Ca.
|
Dom you can add a lot of weight if you want  I would use a Chassis ground at the rear to something of mass (roll bar or frame). With short ground jumpers from the trans case to cross member and head to frame/firewall if the engine is rubber mounted.
"Just a Bracket car dressed up like a streetcar"
|
|
|
|
|
That should tell you. The first thing thay taught 
in auto shop 
So they end up neglecting to ground the battery correctly. Direct current, DC, electron flow is like most liquids, it will take the easeist path back to the battery. Poor grounds will cause all kinds of problems, especially with solid state or semi conductor devices 
Hopefully my commenst will open some minds and eyes to the importance of good grounding 