Will original Dodge 63 firewall bulkhead connectors handle a 70 amp alternator?
Firewall connectors
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I would not recommend it.
PurpleBeeper
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Dumb question…..don’t the older B-bodies have larger wires & connectors at the firewall? I think Big John over in c-bodies posted about this???
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Consider using one of the bypass methods if you intend on that load passing through the bulkhead connector - or pass the cable directly without terminals.
There is no need for 70 Amps to be present under the dash.....unless you plan on doing some arc-welding while driving.
Canadian1968
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Ohhhh boy here we go ........
To the OP, please do some reading either on this site or anywhere else on the web. This topic has been beaten to death so many times its not funny any more. Any question you have has been covered in one thread or another.
As pnora said, I sure wouldn't either.
Your obviously looking to add more electrical load to the system if you are looking to upgrade the alt. It is also important to know WHERE to apply that load on FACTORY style system. There was recently an excellent video explaining this maybe a few months ago.
To the OP, please do some reading either on this site or anywhere else on the web. This topic has been beaten to death so many times its not funny any more. Any question you have has been covered in one thread or another.
As pnora said, I sure wouldn't either.
Your obviously looking to add more electrical load to the system if you are looking to upgrade the alt. It is also important to know WHERE to apply that load on FACTORY style system. There was recently an excellent video explaining this maybe a few months ago.
BigFlo
Well-Known Member
The difference on the early B bulkhead connectors is the power goes to a ring lug screwed to a solid terminal - not thru the typical male/female quick- connect terminals.
It’s not about how much capacity the alternator has - it’s about how much current all of your devices will draw.
It’s not about how much capacity the alternator has - it’s about how much current all of your devices will draw.
Thanks for the info. I will look through this site to find out more information. I added MSD ignition electric fan and air conditioning. Thought I needed more juice. Guess not.
Added MSD ignition and air conditioning. Sound like too much in addition to dash etc
Are these c body connectors more heavy duty than the b?
BigFlo
Well-Known Member
Like the Canadian said, read up. The AC and electric fan current does not need to go thru the bulkhead- you should control those with relays. You power the relays via the inside dash wiring but the power can be handled all within the engine bay wiring.
BigFlo
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No - the same
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Both of those items can be supplied directly from the alternator output stud.
The control wiring is easily supplied by what you already have under the dash.
Roger that. Thanks for the help, Dave
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I'll take that as a win.
I did pretty much that myself last year....total re-wire and supplied the A/C and fans direct from the Alternator output. No problems now.
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A long time ago, I added a 135 amp denso alt to my charger. I added a 4g wire from alt to main lug on firewall relay.
I run more modern halogen headlights, elec fans, fuel pump, efi and I haven’t had any issues.
Nice thing about the Denso i used is it’s externally regulated and bolted into the stock bracket
I run more modern halogen headlights, elec fans, fuel pump, efi and I haven’t had any issues.
Nice thing about the Denso i used is it’s externally regulated and bolted into the stock bracket
Can a dental be regulated mechanically?
Anyway I can get you to send me a copy of that wiring diagram?
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If you go to YouTube for the vid, in the description section, there are links to the slides/diagrams used.
Also here on another thread.
Denso is dual field so I swapped my '68 over to that and removed the mechanical. I've heard you can retain the single field mechanical by grounding one of the field wires from the alt and using just the one wire
I got mine way way back when from an ambulance conversion shop. If you go to rock auto, look up alternator for '02 dodge ram 1ton van with 5.9. 135 amps more than enough for most musclecars with a few add ons. I had to mess with some spacers but the stock mount worked.
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