It would be interesting to see if it was det or the rod finally submitting to the torque and rpm you were giving it. Can you post close up pics of a piston that is intact? The pistons look pretty good to me but I am no expert.

 

The big end is still fully attached, I would vote rod failure. Detonation would have shown up on the tops of the pistons. Cylinder pressure (past MBT) could have led to it, but ultimately it comes down to rod failure. Usually the head will allow coolant push if the cylinder pressure is too high before it does something like this.

Sucky On the bright side now you get to decide on how to make it better.

 

Bummer man, thank you for sharing!

Too many people hide when they have issues or problems, when people share them with everybody on here is a great way to let people know how serious and costly small seemingly insignificant things can mean the difference between good power and liquid metal.

Hope you get it resolved, maybe its time for some braided lines for the boost lines

Scorke

 

Rip!~

 

Is it possible that the piston failed and then the rod broke after hiting the block?

 

Could be, everything like this is debatable whether it was the chicken or egg first. Looking at the piece of the rod in the pan it broke at the strongest part of the rod though which leads me to believe rod.

 

I'd like to see the timing map.

 

I'll post a timing map tomorrow; maybe I'll get the log up too. Right before the incident I pulled timing from 4deg in that area, down to 1 deg at the time I was dumbfounded. It got me thinking I was over mbt, and the drop to 1 deg brought timing back in line making more torque and snapping the rod. There is no sign of any melting on any of the piston fragments or the head.

I did not find out about the wastegate line until after the car was up and running again. I set the boost low for break-in and watched as it spiked over 30. Only then did I find a crack in the line.

I would have loved to have gone the built block route, but it would have been cost and time prohibitive. There was simply too much damage to all the ancillary parts. The head needs to be repaired, oil pump, water pump and just about every little part and bracket bolted to the front and sides of the block needed to be replaced. Obviously I don't have a viable core, so that would have jacked the price of a built bock up another 1-2k. In the end I went with a crate engine and swapped the Red, cams and injectors back in back in. Maybe I’ll do something with the damaged head in the future.

Let me tell you, this was traumatizing. I felt like Spy Hunter on the freeway, the amount of smoke and the sound was incredible.

I now have 700 miles on the new block, the boost is set to 20psi and I am not able to keep my foot on the throttle as I approach 4500rpm in 4thJ

 

sucks to see the damage but thanks for sharing. I consider myself lucky I guess, i was driving around with a huge slice in my WG line for almost a year until I fixed it. Did a couple HPDE's with it like that too, thank goodness for Tephra's knock light!!!

 

sorry to see it man! i don't know if it's going around or what but I seem to be taking more calls about internals lately than i can remember in the last few months.

 

This should be merged with the why to do boost leak check thread as a reason to do them.

Sorry about the loss and good luck with the new motor!

 

I believe that the rupture occurred right at the time of the incident. The day before I was holding steady boost. It would not have shown up as a leak unless it happened to pop at the time of a leak check.

 

I see. I was under the impression there was a tear in the line causing you to overboost. I didn't realize it just popped off.

 

I wouldnt be surprised if that rod just finally met its match as well. I was making in the neighborhood of 450-500 on a stock block (83,000 miles) with an FP green, AEM and E85 and bent the #3 rod....cool part is I didnt know the rod was bent til we pulled the motor apart for some internal upgrades. decided to go with a 100mm eagle crank so I can go 2.3l! With the FP green now upgraded to a Red, it should rip pretty good. Sorry about your luck...I count myself very lucky now!

 

they are really racking up the miles now and putting up with mucho hp for long periods of time lol