Engine Failure at speed... |
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Engine Failure at speed... |
Cracker |
Oct 15 2017, 08:14 PM
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#1
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States |
Well, it is not "if an issue will occur on a race track" but rather just a matter of when! Sunday morning was gorgeous at roughly 65 degrees and cloud cover. The grip was surprisingly good and the dense, cool-ish air enabled the engine to run really strong.
The night before, a few of us "walked the track", taking in the nuances that really can only be seen on foot, kneeling down and taking our time. More drivers should take advantage of this to become more familiar with details that are completely missed behind the wheel of a car. Anywho... We were discussing an asphalt patch that is on entry into the downhill section to turn 10a...specifically, how the patch had an elevated center with ramps on either side. A friend mentioned, "hitting that at speed would cause quite the jolt to the car and driver". Also of concern was the potential loss of grip and the unsettling of the chassis at such a critical point. He was correct as I bore out witness the next morning. We have still not found the smoking gun and only hope it is not internal; the top-end is fully functional with each of the valves operation correctly. The engine does not turn over quickly and that obviously is a cause of rather great concern. I have been doing track events for some time now, over 15-years, and have never encountered such a failure. I guess I can say...enjoy the failure at my expense. PS: Talk about cutting it close...lose an engine down the hill; try to jump start the engine at turn 10a and just BARELY make it up the hill over T11 to glide back to the hot pits. Whew - that was close! (IMG:style_emoticons/default/biggrin.gif) Cheers! Tony https://www.youtube.com/watch?v=VRvMJeXJxTQ My son came in from college - great memories at the track with him! |
porschetub |
Oct 22 2017, 07:13 PM
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#2
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Advanced Member Group: Members Posts: 4,698 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
You are kidding....right,like walking a horse to water after it has died from lack of.
The sample will be so confusing with so many contaminates like copper ,tin and most likely ferrous metals. Total waste of money,by the way in my last job I oil sampled oil every 3000hrs on a large marine engine . |
DM_2000 |
Oct 22 2017, 08:10 PM
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#3
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Member Group: Members Posts: 217 Joined: 16-August 17 From: PA Member No.: 21,351 Region Association: None |
You are kidding....right,like walking a horse to water after it has died from lack of. The sample will be so confusing with so many contaminates like copper ,tin and most likely ferrous metals. Total waste of money,by the way in my last job I oil sampled oil every 3000hrs on a large marine engine . The assumption put forth by the cars owner is that "worn out" oil caused the engine failure. You have listed metals that are generally associated with engine wear. In order to prove or disprove "worn out" oil caused the failure, I'd be looking at properties related to oil quality not engine wear. Elements like Potassium, Boron, Sodium, Calcium, Magnesium, Phosphorus, Zinc and Barium are engine oil additives. Also important are viscosity, fuel contimanation, antifreeze, water, insolubles ( formed by oxidation of oil ) If all of the above is within acceptable limits, "worn out" oil didn't cause the failure. If the root cause of the failure isn't addressed, the motor will come apart again. Even worse, if the root cause of failure is unknowingly eliminated by accident or by using a different set of parts, the owner will happily go on changing oil thinking the problem was solved when it hasn't. |
Cracker |
Oct 22 2017, 08:19 PM
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#4
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States |
I believe this oil to be too contaminated to provide a conclusive result as well. The engine will be receiving a complete professional rebuild so IF there was something else that contributed to its failure (inside the motor) - it will be rectified. I will probably simply build a duplicate of what I had - even if I did build a higher-strung de-stroked version it would not have more horsepower - just a different temperament. A mean one...and more revs to work with. Those improvements come at a tremendous financial cost and I most likely will not take that on - this will be painful enough.
I am pulling the engine tomorrow afternoon... Tony You are kidding....right,like walking a horse to water after it has died from lack of. The sample will be so confusing with so many contaminates like copper ,tin and most likely ferrous metals. Total waste of money,by the way in my last job I oil sampled oil every 3000hrs on a large marine engine . The assumption put forth by the cars owner is that "worn out" oil caused the engine failure. You have listed metals that are generally associated with engine wear. In order to prove or disprove "worn out" oil caused the failure, I'd be looking at properties related to oil quality not engine wear. Elements like Potassium, Boron, Sodium, Calcium, Magnesium, Phosphorus, Zinc and Barium are engine oil additives. Also important are viscosity, fuel contimanation, antifreeze, water, insolubles ( formed by oxidation of oil ) If all of the above is within acceptable limits, "worn out" oil didn't cause the failure. If the root cause of the failure isn't addressed, the motor will come apart again. Even worse, if the root cause of failure is unknowingly eliminated by accident or by using a different set of parts, the owner will happily go on changing oil thinking the problem was solved when it hasn't. |
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