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Re: Starter cable gage needed [Re: CMcAllister] #2448111
02/07/18 05:49 PM
02/07/18 05:49 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
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Dont know, but i can check. Maybe 10yrs old longacer switch. What should all the measures be to get a passing grade?

Re: Starter cable gage needed [Re: mopar dave] #2448116
02/07/18 05:57 PM
02/07/18 05:57 PM
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Fulton County, PA
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CMcAllister Offline
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I've checked them with an ohm meter and caught bad ones. But it's a big difference when trying to run a few hundred amps through it. I usually just change them out occasionally or if an issue pops up. I would think a voltage drop test from the battery positive to the output stud of the main switch, while the starter is engaged, would show any issue with the switch.


If the results don't match the theory, change the theory.
Re: Starter cable gage needed [Re: mopar dave] #2448221
02/07/18 10:04 PM
02/07/18 10:04 PM
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CA
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crackedback Online content
top fuel
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CA
Another reason I don't run my starter cable through the cut off. It's death by a thousand cuts killing them regardless of momentary rating. Sometimes they will weld themselves in the on position and the switch won't work at all.

A test that only requires a wrench, hook the battery up to the downstream/starter side of the cut off and test it. Turn the key. If it does the same action as when going through the switch, you can scratch it off the list.

Re: Starter cable gage needed [Re: crackedback] #2448249
02/07/18 11:03 PM
02/07/18 11:03 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
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Ok, ill check that.

Re: Starter cable gage needed [Re: mopar dave] #2448449
02/08/18 12:42 PM
02/08/18 12:42 PM
Joined: Feb 2008
Posts: 710
Central TEXAS!!!!
sr4440 Offline
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Central TEXAS!!!!
Originally Posted By mopar dave
Dont know, but i can check. Maybe 10yrs old longacer switch. What should all the measures be to get a passing grade?


Dave take a few mins to go to youtube and look up "voltage drop test". once you understand how to test, your electrical problems will go away and any that come up can be solved quickly. this is a skillset that every DIY'er should know how to use.

also the correct answer is "0" voltage loss across the switch.

climbing down off of soap box

Joe


Without Data, you’re just another guy with an opinion.
Re: Starter cable gage needed [Re: sr4440] #2448456
02/08/18 12:48 PM
02/08/18 12:48 PM
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Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
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Ok. Thanks for that.

Re: Starter cable gage needed [Re: mopar dave] #2448559
02/08/18 03:52 PM
02/08/18 03:52 PM
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Fulton County, PA
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CMcAllister Offline
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Correct, any resistance across a switch, replace it.

Was looking at a Ron Francis catalog this morning for something and ran across his trunk mount battery cable kit for street rods with EFI, power accessories, etc. 1ga.


If the results don't match the theory, change the theory.
Re: Starter cable gage needed [Re: mopar dave] #2448564
02/08/18 04:04 PM
02/08/18 04:04 PM
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Bend,OR USA
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Cab_Burge Offline
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I would , and do , use either #1 or #0 for my trunk mounted batteries depending on the compression and if it is a street car or race only car.
#0 on race only cars with multiple grounds also up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Starter cable gage needed [Re: mopar dave] #2448588
02/08/18 04:48 PM
02/08/18 04:48 PM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline
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W. Kentucky
I just picked up my wire, 1/0 to the starter and #4 for the charge wire and to the feed up front. Also my starter wire will not go through my disconnect switch.

Re: Starter cable gage needed [Re: justinp61] #2448590
02/08/18 04:54 PM
02/08/18 04:54 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
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Most tech guys track test is to flip the switch to off and have you try and crank. Better make sure it shuts the starter solinoid feed circuit off if the starter main feed doesn't go through the switch.
Doug

Re: Starter cable gage needed [Re: dvw] #2448600
02/08/18 05:13 PM
02/08/18 05:13 PM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline
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W. Kentucky
Originally Posted By dvw
Most tech guys track test is to flip the switch to off and have you try and crank. Better make sure it shuts the starter solinoid feed circuit off if the starter main feed doesn't go through the switch.
Doug


It will.

Re: Starter cable gage needed [Re: mopar dave] #2448615
02/08/18 05:45 PM
02/08/18 05:45 PM
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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CMcAllister Offline
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Fulton County, PA
Rule book says master switch must shut off all electrical functions. Ever have a starter "stick", solenoid jam and keep the starter engaged? I have. How you going to fix that when the starter is hooked directly to the battery? If running the starter smokes your master switch, you need a better master switch.


If the results don't match the theory, change the theory.
Re: Starter cable gage needed [Re: CMcAllister] #2448645
02/08/18 06:58 PM
02/08/18 06:58 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
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My Longacre master switch is getting very old at this point. Still shuts everything off.

Re: Starter cable gage needed [Re: mopar dave] #2448866
02/09/18 01:04 AM
02/09/18 01:04 AM
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2 Offline
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I used aircraft wire, it has like 120 strands in it in a 1/0 size, and it can handle the amperage of a standard wire that is 1 size larger. Tim


1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!
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