Question for Rex or anyone else in the know

Rick Baum

Rick Baum

Joined
Mar 14, 2000
Messages
509
Rex, I have been trying for the last month or more to track down some Texaco Qunchtex A. I have located 6 barrels in California, but here's the problem and I hope you can shed some light.

I had to go through a global sales rep to find a local distributor. Both parties sent me data sheets for the Type A oil. One data sheet is dated April, 2002 and the other sheet is dated 5-'96. All of the data on the two sheets matches up almost exactly except for the quench speed. The older dated data sheet refers to the quench speed as: "GM quench speed seconds - 28, while the newer data sheet refers to the quench speed as: "Quench speed,s - 20. I have called the lubrication engineers at Chevron/Texaco to find out if the formula had changed or if a new method of testing had been used. I haven't gotten an answer yet, so I did some research on the net. I found out that the GM quench speed refers to a test utilizing the GM quenchometer and that many companies are switching over to a new test called ISO 9550 Cooling Curve Analysis Proceedure aka "Quenchilizer". My question to you, and I hope that you know the answer is: Would switching from the old GM test to the new ISO test show an 8 second difference in quench speed for the Texaco type A? Or, would the cooling curve show more detail in the form of the curve and the overall cooling time would not change? I still don't know for sure that the testing method was changed but I assume that it has due to the verbiage change on the data sheets.

Thanks in advance,
Rick
 
I have been trying to find what a 26 on the GM Quenchometer means. Do you know? I am assuming it is the time for a nickel ball to go from temp A to B, but what is temp A and B?

I have a line on some Sunoco quench oil that has a 26 on the GM scale. There is a 5 gallon bucket of it sitting in a wharehouse out here in MI. The guy will sell it to me for $10. I am just trying to figure out if it is fast enough for HT of 1095.

Some one help us:confused:
 
Hey Laredo77, I just happened to look that info up on the web today, and you're right in your assumption. I printed it out and then promptly left it at work. From my aging memory I'll see if I can explain it.

The GM Quenchometer test as I read it is: Take a 7/8" nickel ball and heat it to a given temp which is around 1650?? degrees. When it reaches the appropriate temp. the ball is dropped into a wire basket within a beaker containing the quenching fluid which is held at 70 degrees. The moment that the ball is dropped a timer starts. A magnet is placed on the outside of the beaker. As the nickel cools it goes through a phase where it becomes magnetic at approx. 625?? degrees. As soon as it hits this magnetic temp. it attracts the magnet and stops the timer. The time it takes for the ball to go from the start temp to the magnetic temp. is the GM quench speed. I can dig up the exact temps and post the real info on Monday when I go back to work if you'd like. Hope I didn't confuse you.

So the oil that you found is really close to Texaco type A as far as GM temp speed is concerned. I also learned that there is a newer test that is being used that actually plots a cooling curve. So it's hard to say that the oil you found would perform exactly as the type A.

Hope this helps.

Rick

I just found the info, the temps are 1620 F and 676 F.
 
DaQo'Tah, I didn't know about these tests either until today when I got bored at work... One of these days I'm going to get fired... I guess if it happens, I'll have lot's of time to make knives.

By the way, Sorry about the Dodge! Sounds like you and the old gal had lot's of good times together. Are you planning any kind of a memorial service for her? I guess you could turn her into a summer house for the cats:)

Rick
 
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