[devauxmidwest]

Finally getting back to my 67 Grand Prix. Getting engine rebuilt, and will change the factory alternator with a 12Si 3 wire alternator. The car has factory gauges that include an operating ammeter gauge.

I understand that the B body cars have a shunt that is part of the ammeter circuit. Can I maintain my ammeter gauge function with the 12Si 3 wire upgrade?

Thanks

[cmoc-bob]

Ron Francis Wiring has several FAQ's on Ammeters - and basically says we use voltage gauge for a reason.

a 12Si can easily put out more amperage than you factory gauge can handle.

And there is a good reason we regulate the voltage with car electrical systems, so 1-wire isn't ideal. Great for a race car, not a street car.