57 Aztec barn find on ebay

[Tom S.]

With a stated 57,000 miles (and original tired), just freshened barn find, could this car make a 4 Star candidate?

[Tom H.]

Re: 57 Aztec barn find on ebay

Here's the link. http://cgi.ebay.com/ebaymotors/Chevr...item27c18b6948

I don't know much about that generation, but it sure looks neat.

[Michael D.]

Re: 57 Aztec barn find on ebay

Looks like a nice car. 56-57 are my personal favorites.

[Patrick H.]

Re: 57 Aztec barn find on ebay

Such small, low resolutions photographs for a car like that. The person running the auction really isn't doing it justice if in fact it's as original as they suggest.

[Bruce B.]

Re: 57 Aztec barn find on ebay

The radiator cap is a replacement.
The rear license plate bracket is on upside down.
Original tires?
The car looks to good to be true...

[Mike E.]

Re: 57 Aztec barn find on ebay

He's apparently very proud of the jack instructions sheet---two pics of those, but nothing about the undercarriage, no close-ups of paint, chrome, etc.?

[Gary C.]

Re: 57 Aztec barn find on ebay

Original tires - highly unlikely for 50k miles, 10-15k miles if lucky
Tachometer rev counter 450,250 revs?

Gary
....

[Jim L.]

Re: 57 Aztec barn find on ebay

Original tires - highly unlikely for 50k miles, 10-15k miles if lucky
Tachometer rev counter 450,250 revs?

Gary
....

If you assume a 3.70:1 rear end and tires that make about 750 revolutions per mile, then the actual vehicle miles needed to total that many thousands of revs would be about 162,000.

So, 57000 miles? Definitely not.

Jim

[Philip P.]

Re: 57 Aztec barn find on ebay

I am confused (not surprising) but is not the rev counter engine rpms?

[Bruce B.]

Re: 57 Aztec barn find on ebay

The tachometer displays the rpm at any given time.
The rev counter shows the total number of engine revolutions over time.

[Philip P.]

Re: 57 Aztec barn find on ebay

I guess I was not clear as I am aware of the function of the Tachometer. I am not sure what the reading of the counter would have to do with the revolutions of the tires and gear ratio etc. I know the faster the speed the more RPMs. How can mileage and engine RPMs coounter compare, Next to impossible I would think the car surely is not in constant motion. Am I missing something here.

[Mike E.]

Re: 57 Aztec barn find on ebay

A mile is a mile, whether you're going 100 mph or 10 mph, so the number of revolutions of the tires and engine is the same. Obviously, the car would also do some idling, so you can't hit the number of miles exactly, but that many RPM's has to be a whole lot of miles or an unbelievable amount of idling.

I guess I was not clear as I am aware of the function of the Tachometer. I am not sure what the reading of the counter would have to do with the revolutions of the tires and gear ratio etc. I know the faster the speed the more RPMs. How can mileage and engine RPMs coounter compare, Next to impossible I would think the car surely is not in constant motion. Am I missing something here.

[Jim L.]

Re: 57 Aztec barn find on ebay

I am not sure what the reading of the counter would have to do with the revolutions of the tires and gear ratio etc. I know the faster the speed the more RPMs. How can mileage and engine RPMs coounter compare, Next to impossible I would think the car surely is not in constant motion. Am I missing something here.

The counter built into early tachometers indicates the cumulative number of engine revolutions, measured by thousands. In the case of the '57, the rev counter (or totalizer, if you prefer) indicates the engine has turned approximately 450,250,000 revolutions.

If the car has a 3.70:1 rear axle ratio, and if every engine revolution resulted in wheel revolution, then the wheels would have rotated approximately 450250000/3.70 = 121689189 times.

The tires on that car would rotate approximately 750 times per mile. So the approximate mileage suggested by the rev counter can be calculated as 121689189/750 = 162252 miles.

Your observation that the car is not in constant motion is valid. What that means is that the actual cumulative miles will be somewhat less than 162K.... hmmmm... maybe 157K, which would be consistent with the odometer reading.

My unrestored '54 has 79,000 miles on it. The rev counter reads 220748(000) which, using my method above, suggests 82000 cumulative miles.... clearly but not substantially more than the actual miles. The "missing" 3K miles is due to engine idling.

Jim

[Michael G.]

Re: 57 Aztec barn find on ebay

or....the trans was stuck in 1st the whole time

[Tom P.]

Re: 57 Aztec barn find on ebay

To add to the rev counter on the tach of 53-58 Vettes, the FIRST (far right) number indicates 1000 revolutions of the engine each time it changes from one number to the next number.