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-   -   Amp Meter ?? (https://www.fordbarn.com/forum/showthread.php?t=228443)

fixitphil 09-05-2017 09:48 AM

Amp Meter ??
 

I'm installing a 12v system (60 amp alt) in my '31 Sport Coupe and have been advised by a competent club member that the stock amp meter will have a tendency not to hold up, that I should replace it with a voltmeter. any thoughts and have any of you experienced that problem?
Thanks, Phil

duke36 09-05-2017 10:03 AM

Re: Amp Meter ??
 

We have 12 volt , 60 amp alt and Zipper Ignition. So far no issues with 30 amp. ammeter.

fixitphil 09-05-2017 10:06 AM

Re: Amp Meter ??
 

Thanks Duke. I think the stock amp meter is 15 volt. Maybe that is the answer.

Jim Brierley 09-05-2017 10:49 AM

Re: Amp Meter ??
 

You'll have no trouble with the stock amp meter.

RawhideKid 09-05-2017 10:53 AM

Re: Amp Meter ??
 

Hey Phil, I use both a volt and 30 amp meter. But I only have a 35amp alternator, but the ammeter is not voltage sensitive, so use what ya got. I would however install a 30amp meter as opposed to the stock 20 amp meter, less strain on the needle.

fixitphil 09-05-2017 11:04 AM

Re: Amp Meter ??
 

Thanks guys. This info really helps.

Charlie Stephens 09-05-2017 04:04 PM

Re: Amp Meter ??
 

On my '32 I placed a jumper wire across the the posts on the ammeter so only 1/2 (approx) of the current goes through the meter. Now all I have to do is double the amps in my head when reading the meter. You may be able to do this at the junction box depending on your wiring diagram. Read up on the quality of the reproduction ammeters before you make your decision.

Charlie Stephens

fixitphil 09-06-2017 07:04 AM

Re: Amp Meter ??
 

Thanks to all of you for the help.

marc hildebrant 09-06-2017 01:02 PM

Re: Amp Meter ??
 

Quote:

Originally Posted by Charlie Stephens (Post 1523357)
On my '32 I placed a jumper wire across the the posts on the ammeter so only 1/2 (approx) of the current goes through the meter. Now all I have to do is double the amps in my head when reading the meter. You may be able to do this at the junction box depending on your wiring diagram. Read up on the quality of the reproduction ammeters before you make your decision.

Charlie Stephens

The gauge of the wire that you use for the added wire determines how the amp meter scale is changed. High number does less, low number does more. The electrical term for the added wire is a "shunt".

Marc


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