67 Ameter gauge

[BigMatt]

These gauges never worked well even when new

I know my knowledge is not nearly as deep as others on this subject. If your statement is true I would think the Mercury dealerships back in the day would have been hounded by upset customers forcing a lot of ammeters to be replaced. I do remember my first XR7 ammeter moving (working).

Steven

Like they were with clocks?

[Royce]

The fact is I own an NOS one and I have converted my GT-E to a voltmeter supplied by Rocket Man. The Dyno Don car will get the NOS unit when I restore the dash, although the current (pun intended) unit works fine and shows considerable deflection after start up.

Your guy is simply wrong when he states that these units were inaccurate and don’t deflect at all. He does not make the distinction of damaged in his essay as far as I can see. So he is simply mistaken. It’s not my theory about him being mistaken, it is a fact.

Bottom line is that who ever that guy is who wrote the forum post that you like so well is simply uninformed and does not have any idea what one of these gages looks like when it is working properly. All the theory in the world won’t show him that.

Royce, I meant no offence - just wanted to present some information from another forum that I found to be an interesting read.

I still think there’s room for both of you (Mr. Theory and Mr. Practice). The other guy is coming from the perspective of looking at 45+ year old gauges and wiring, doing quantitative measurements of what he finds and drawing some conclusions on why things are the way they are now.

I believe you are speaking from first hand experience of how things were when these cars were much younger, the other guy is only able to extrapolate from current times.

In any event, you pretty much agree that these ammeters are sensitive devices that can easily be rendered practically useless by a number of factors including the passage of time and modern replacement parts like high output alternators.