Well I finally got the engine out and have made a humble opinion.
From what it looks like, the bottom of the piston broke first at the oil ring / wrist pin line. The energy from the break threw the piston up, impacted the head, and made a impression of the combustion chamber in the top of the piston. As I find the piston, it is wedged at 30deg. To its normal plane. The rod ripped out the last cam segment, cancelling valve movement and avoiding damage to the valves (I think) although the piston was down about an inch on the high side and 1.5 on the low side. I believe it stopped due to being wedged without a skirt.
The rod swung around the rod journal at 4,000 rpm about 5" long with the wrist pin attached while the car was traveling forward. It really went bad when the car, after going off track, and in gear, staeted going backwards. I think the reverse action now forced this rod backwards and bent it in the arch you have seen. At some point tossing or just breaking off the cap.
I cannot guess at what then wedged on only 1 side of the engine and the crank just came around and beat about a 1/8th inch deep notch at the oil port. Im not going to be able to buff that out
Block, crank, pan, cam shaft, 1 piston, and rod...destroyed, FUBAR!
Would love some input on what you see.
I will figure how to download pictures tomorrow!
Current, Captain, Driver, Mechanic, Idiot, Shop keeper, Sponsor, Accountant, Transport Driver, of Team Billy Beer Racing
I know there is money in racing.....Cause I put bunch in.
79' Ford Futura sporting a 200 ci six.
Best finish: placed 2 in "C" class about 44 overall. Sears Pointless 14',.