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Username Post: How much amps can a 1941 Chevy ammeter handle?        (Topic#369976)
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-04-22 07:48 AM - Post#2849598    


I'm just doing all new wiring, and just realized that pretty much everything is going straight trough the ammeter. I converted to 12V and running a standard GM 10si 3 wire alternator (I think it delivers up to 65 amps), so I was also planning to use a bigger gauge alternator cable to the battery/starter post, also the remote sensing cable should go there.

The question is now, does it make any sense?
Having the remote sensing cable at the starter (which is also basically my hub for everything) and compensating for the voltage drop, the alternator will output more power. But will the ammeter handle that?

Thanks, Frank



 


Mel Foye 
*VIP* Original Founding Member Group
Posts: 5597
Mel Foye
Reg: 09-29-00
11-06-22 07:45 AM - Post#2849708    
    In response to FishFry

Are there numbers on the meter that show a range?



It Was On Fire When I Laid Down.


 
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-06-22 12:29 PM - Post#2849726    
    In response to Mel Foye

Just C and D and a few dots between.



 
CowboyTrukr 
"11th Year" Silver Supporting Member
Posts: 4826
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
11-08-22 12:56 PM - Post#2849801    
    In response to FishFry

What size conductor was in there before converting to 12V?

Greg

‘01 Silverado 2500HD 8.1/Allison 1000 Xcab/LB
'00 Explorer XLT 4.0 SOHC V6 Auto
'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500 SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-08-22 11:39 PM - Post#2849823    
    In response to CowboyTrukr

I rewired the whole car about 15 years ago - since it was 6V, I used AWG 10 for pretty much everything.

2 years later I swapped the generator for a 3 wire alternator (6V) that came with it's own wires. Not 100% sure but I guess the cable to the ammeter is also a 12.

Now I have a AWG 8 that I want to use for the alternator.

Frank



 
bobb 
Super Senior Member
Posts: 6180

Loc: paradise
Reg: 09-05-03
11-13-22 09:33 AM - Post#2850023    
    In response to FishFry

i wire ampmeter so only battery charge shows. everthing else is taken from the alternator side of the meter. not saying its right. its the way i like it.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Shepherd 
Valued Contributor
Posts: 2750

Loc: Lake George, NY
Reg: 11-11-15
11-13-22 10:56 AM - Post#2850031    
    In response to bobb

Just say'n here, if it were me I'd dump that ammeter and switch to a voltmeter, safer system than a possibly overloaded ammeter.



 
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-13-22 12:04 PM - Post#2850033    
    In response to bobb

  • bobb Said:
i wire ampmeter so only battery charge shows. everthing else is taken from the alternator side of the meter. not saying its right. its the way i like it.



Interesting. Could you please post a drawing or diagram, so I get a better grasp?

Thanks, Frank




 
bobb 
Super Senior Member
Posts: 6180

Loc: paradise
Reg: 09-05-03
11-19-22 09:19 AM - Post#2850226    
    In response to FishFry

battery to starter + wire, big and strong.
alternator + to buss bar that feeds everything else fused or fuse linked including feed through amp gauge to battery. from buss bar to amp gauge and bat i like at least 10 gauge for a short run. bigger for longer runs. hope this make sense.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Shepherd 
Valued Contributor
Posts: 2750

Loc: Lake George, NY
Reg: 11-11-15
11-19-22 11:13 AM - Post#2850235    
    In response to bobb

Good info, but as I said, what happens if the ammeter is overloaded, I've seem them show signs of beginning to burn in cars with additional loads and more amperage available and increased charging rates.



 
bobb 
Super Senior Member
Posts: 6180

Loc: paradise
Reg: 09-05-03
11-20-22 10:41 AM - Post#2850269    
    In response to Shepherd

that is why the only amps going through my gauge is battery charging amps. not system load amps. true these things can fry and have always considered that but thats a chance i take for now. there may be inductive gauges available that are fire safe.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Shepherd 
Valued Contributor
Posts: 2750

Loc: Lake George, NY
Reg: 11-11-15
11-20-22 12:53 PM - Post#2850288    
    In response to bobb

Safer way to to connect it.



 
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-21-22 01:47 AM - Post#2850305    
    In response to bobb

  • bobb Said:
battery to starter + wire, big and strong.
alternator + to buss bar that feeds everything else fused or fuse linked including feed through amp gauge to battery. from buss bar to amp gauge and bat i like at least 10 gauge for a short run. bigger for longer runs. hope this make sense.



So basically something like this?






 
bobb 
Super Senior Member
Posts: 6180

Loc: paradise
Reg: 09-05-03
11-24-22 01:18 PM - Post#2850446    
    In response to FishFry

https://www.fwmurphy.com/uploaded/documents/pd fs/0...
this drawing is a bit simplified as it does not include a fuse box or buss bar. it just notes, to electrical system.
discussions like this are good to ponder. in the event of alternator failure, all current draw will flow through the amp gauge.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


Edited by bobb on 11-24-22 01:38 PM. Reason for edit: No reason given.

 
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-24-22 10:28 PM - Post#2850465    
    In response to bobb

Thanks Bob.

I'm basically using my starter as a bus bar, but would the drawing I posted earlier be correct regarding the "splicing in" of the ammeter?

Frank



 
bobb 
Super Senior Member
Posts: 6180

Loc: paradise
Reg: 09-05-03
11-25-22 08:54 AM - Post#2850481    
    In response to FishFry

looks like that drawing bypasses the gauge giving you a 0 reading.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
FishFry 
Newbie
Posts: 41
FishFry
Loc: Augsburg - Germany
Reg: 11-01-22
11-25-22 10:21 AM - Post#2850490    
    In response to bobb

I don't get it. Isn't that exactly how you described it?

"battery to starter + wire, big and strong.

alternator + to buss bar that feeds everything .. feed through amp gauge to battery".

Obviously I'm too stupid.

Can you please make me a drawing.
Nothing fancy - pan and paper are fine.

Thanks, Frank






 
bobb 
Super Senior Member
Posts: 6180

Loc: paradise
Reg: 09-05-03
11-27-22 10:27 AM - Post#2850586    
    In response to FishFry

if you use the battery as a buss, all amps are running through the amp gauge. i use the alternator big wire for the buss. but not at the alternator. very similar to this.
https://www.tractorforum.com/attachments/12v-conve ...

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 


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