GROUND WIRE QUESTION.................... - Moparts Forums

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GROUND WIRE QUESTION.................... #1372318 01/19/13 04:36 PM 01/19/13 04:36 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Finishing up my dash wireing and was curious if I should run a ground wire from the trunk batt directly to the bulkhead on the firewall or not and what size............thankxxx. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: GROUND WIRE QUESTION.................... [Re: Thumperdart] #1372319 01/19/13 04:53 PM 01/19/13 04:53 PM
Joined: Jan 2003 Posts: 2,364 PA 7 70HemiGTX top fuel
70HemiGTX top fuel 7 Joined: Jan 2003 Posts: 2,364 PA	If you only have the original sub-frames, I'd run a very heavy ground wire directly to the engine block. Plus tie in other heavy ground cables to the body (rear sub-frame directly from the battery) and from the engine to the K-frame and the front sub-frame. My brother is an electrical engineer and his favorite saying is "You can never have too many ground wires. Especially on a car."

Re: GROUND WIRE QUESTION.................... [Re: 70HemiGTX] #1372320 01/19/13 04:57 PM 01/19/13 04:57 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	I have subframe connectors and everything else you mentioned was just thinking since my MSD grounds there I thaught it may help. Never had a problem just lookin to better my system. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: GROUND WIRE QUESTION.................... [Re: Thumperdart] #1372321 01/19/13 05:00 PM 01/19/13 05:00 PM
Joined: Aug 2003 Posts: 43,252 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,252 Bend,OR USA	for the dash wiring grounding I would run a number four directly to the dash or firewall, I would also run a #2 to the cylinder block and then run several #10 from the block to the sub frame in front and at least 1 #2 from the battery to the rear sub frame in the trunk Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: GROUND WIRE QUESTION.................... [Re: Cab_Burge] #1372322 01/19/13 05:03 PM 01/19/13 05:03 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Got that stuff covered Cab just thinking about a small wire from the batt directly to the stud on the firewall which the MSD and all of my other grounds go to..............Probably not needed I guess. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: GROUND WIRE QUESTION.................... [Re: Thumperdart] #1372323 01/19/13 05:10 PM 01/19/13 05:10 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	Quote: Got that stuff covered Cab just thinking about a small wire from the batt directly to the stud on the firewall which the MSD and all of my other grounds go to..............Probably not needed I guess. I ground everything back to the battery using lugs and a grounding block, See ground block in the lower left of the panel. (progress pic) http://www.nmbuilder.com/Panel-o-stuff.jpg I think your plan is a good one. 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: GROUND WIRE QUESTION.................... [Re: Adobedude] #1372324 01/19/13 05:38 PM 01/19/13 05:38 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	........... 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: GROUND WIRE QUESTION.................... [Re: Thumperdart] #1372325 01/19/13 06:38 PM 01/19/13 06:38 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	I run the same size as the positive. the ground is just as important as the positive

Re: GROUND WIRE QUESTION.................... [Re: Quicktree] #1372326 01/19/13 06:59 PM 01/19/13 06:59 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	Quote: I run the same size as the positive. the ground is just as important as the positive Yep, when using the wire cage chart you have to include the length of the ground. My re-wire all started because I was having fuel pressure issues. Over the years of adding stuff I had more grounds than RWHP. Cleaned it up and no problemo. 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: GROUND WIRE QUESTION.................... [Re: Adobedude] #1372327 01/19/13 08:15 PM 01/19/13 08:15 PM
Joined: Oct 2007 Posts: 3,978 Hilltown Pa 1967dartgt master
1967dartgt master Joined: Oct 2007 Posts: 3,978 Hilltown Pa	Quote: Quote: Got that stuff covered Cab just thinking about a small wire from the batt directly to the stud on the firewall which the MSD and all of my other grounds go to..............Probably not needed I guess. I ground everything back to the battery using lugs and a grounding block, See ground block in the lower left of the panel. (progress pic) http://www.nmbuilder.com/Panel-o-stuff.jpg Wow looks good, need to do my car one of these years! I think your plan is a good one. Brett Miller W9 cnc'd heads STR Chassis fabraction

Re: GROUND WIRE QUESTION.................... [Re: 1967dartgt] #1372328 01/19/13 08:21 PM 01/19/13 08:21 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	I ground each head to a bulkhead ground home of the Sox and Martin Hemi Duster

Re: GROUND WIRE QUESTION.................... [Re: 1967dartgt] #1372329 01/19/13 08:55 PM 01/19/13 08:55 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: Quote: Got that stuff covered Cab just thinking about a small wire from the batt directly to the stud on the firewall which the MSD and all of my other grounds go to..............Probably not needed I guess. I ground everything back to the battery using lugs and a grounding block, See ground block in the lower left of the panel. (progress pic) http://www.nmbuilder.com/Panel-o-stuff.jpg Wow looks good, need to do my car one of these years! I think your plan is a good one. I have that same bank of relays in my Rampage... it is a nice piece... it controls my head lights, fan, water pump... being a tube chassis car I have a stud welded to the chassis back near the battery and one welded to it near the engine on the drivers side.. I ground the engine off of the engine mounting ear and and have another stud inside on the knee loop on the passenger side... that point is for all the inside electrical stuff

Re: GROUND WIRE QUESTION.................... [Re: Thumperdart] #1372330 01/19/13 08:57 PM 01/19/13 08:57 PM
Joined: Mar 2006 Posts: 9,863 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,863 MI, usa	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

Re: GROUND WIRE QUESTION.................... [Re: dvw] #1372331 01/19/13 09:00 PM 01/19/13 09:00 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	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 sorry but thats absolutely not true.

Re: GROUND WIRE QUESTION.................... [Re: Quicktree] #1372332 01/19/13 09:17 PM 01/19/13 09:17 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	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 sorry but thats absolutely not true. I'll take my tube chassis any day for a ground

Re: GROUND WIRE QUESTION.................... [Re: MR_P_BODY] #1372333 01/19/13 09:41 PM 01/19/13 09:41 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	Quote: 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 sorry but thats absolutely not true. I'll take my tube chassis any day for a ground ok,i'll keep running a good copper wire up front and use that there is a reason all the electronic device people tell you to do that I think.

Re: GROUND WIRE QUESTION.................... [Re: Quicktree] #1372334 01/19/13 09:45 PM 01/19/13 09:45 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	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 sorry but thats absolutely not true. No better ground than the frame? We're talking cars/trucks with the battery in the back, MSD (or EQ) somewhere in the middle. Maybe in a stock situation where everything is under the hood the frame would work. But I tried the frame, no thanks. 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: GROUND WIRE QUESTION.................... [Re: Quicktree] #1372335 01/19/13 10:08 PM 01/19/13 10:08 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: 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 sorry but thats absolutely not true. I'll take my tube chassis any day for a ground ok,i'll keep running a good copper wire up front and use that there is a reason all the electronic device people tell you to do that I think. I've been doing this for YEARS... the area of the tube is more than sufficient plus amps make heat and the tube is exposed without any insulation on it... the old frame cars thats way different.. they have spot welds holding the metal together... I dont

Re: GROUND WIRE QUESTION.................... [Re: Quicktree] #1372336 01/19/13 11:29 PM 01/19/13 11:29 PM
Joined: Mar 2006 Posts: 9,863 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,863 MI, usa	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 sorry but thats absolutely not true. I'm willing to listen, why is a solid welded piece of tube steel a bad ground? I could understand it if you were using a stock spot welded 40 year old unibody. We run way more sensitive wiring in current vehicles, CAN Bus ETC.Chassis is the prefered ground. Doug

Re: GROUND WIRE QUESTION.................... [Re: Adobedude] #1372337 01/19/13 11:34 PM 01/19/13 11:34 PM
Joined: Mar 2006 Posts: 9,863 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,863 MI, usa	Quote: 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 sorry but thats absolutely not true. No better ground than the frame? We're talking cars/trucks with the battery in the back, MSD (or EQ) somewhere in the middle. Maybe in a stock situation where everything is under the hood the frame would work. But I tried the frame, no thanks. New Chargers and Challengers do have the battery in the rear. How many computer modules do think each one has? The slightest interference drives them nuts. A good ground is absolutely necesary Doug

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