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! |
Cracker |
Oct 22 2017, 06:45 AM
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#2
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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 don't have a hydro locked cylinder...starting to suspect an oiling issue - sadly given the effort to build a package to avert this possibility. I noticed in my hi-rez video that my oil pressure gauge was jumping around - comparing it to my previous video's - it historically barely moves. Odd that there were no overtly noticeable noises audible from the the vid or from the my seat. Either way, that would be a fault of my own if that turns out to be the case - I should have caught it! There is no fuel smell at all; the plugs were showing a leaner condition but also shut down just off WOT on a 1/2 mile pull so to be suspected; both the alternator and dry sump belts are present; I had oil pressure all the way through shut-down. Hmm?
PS: I have had a hydro-locked engine once before; I bought it that way. The PO had let the intakes bolts loosen up and coolant "secretly" filled a cylinder. In that case, the engine would not budge since the coolant does not compress. I pulled the plug, drained and blew out the cylinder, tightened the intake bolts; it then ran perfect. Also, the PCM fuse is giving me a 12.18 volt reading yesterday...I am also not ignoring your suggestions regarding spinning the motor but there is not enough clearance with it in the car. T |
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