Black crank throw...........it grabbed a bearing.

Main web looks cracked. Possible that happened first. Crank may be broken.

Rod didn't break.......it got sawed off

In the first photo, there is a notch in the bottom of the cylinder on the cam side.

why is that. i thought that was the first one to get oil?

thats from the rod. put a nice notch in it.

Im not sure why. Just what ive seen. Ive seen more number 8's jacked up than any of the rest of the journals.

havent looked at the other bearings yet and wont have time til this weekend, but why would #8 get the least oil.

dont make sense. i opened up all those passages. one thing i did do diffently this time was use single groove main bearing. will be going back to a full groove next time for sure.

I don't think I ever hurt number 8. If all,it did was notch the bores just sleeve it unless you have a bunch of blocks around.

didnt take out the pan rail, but it sure did a number on the bottom of the cylinder. pretty sure the block is toast.

I feel for your loss, get it apart, sweep up the mess and get after it again. Only thing that gets you over something like that is a newer better one, just like women.

That sucks man, sorry to see this.

How much rod bearing clearance did it have?

Sorry to hear. Hope things work out for you.

sorry to here that dave ,is it a 4340 crank and were they new rods or new rod bolts

what was the oil system; pan, pick-up, pump?

Wow, sorry to see this! Hopefully you can salvage the topend and get something going again soon.

Hopefully the block can be saved? Never done it, but maybe a Diesel engine repair shop might be able to weld up any cracks.

Sucks. Been there (not on dyno) but had one come apart at 7,200. Not much left and just had to start completely over.

Sorry to hear this.

a little over .002" (.00225)? and .0033" on mains. only thing I did different was I used a single groove main bearing. the block,crank and rods came from the last build I had and it went 8yrs. that last build had .002 on the mains and rods and never had a issue.

Sorry to hear it man, I feel your pain I lost one on the dyno about a year ago it didnt break anything but burnt the crank and one rod. It happened on the forth dyno pull and was also down about 50 h.p.. I would have been real upset if it hurt my R3 block as they are almost impossible to find. This is also why I dyno all my motors better on the dyno at the engine builders shop than at the track. It got back together and made even more power and torque than what I expected for what the combo is. I hope you find the problem
And build it even stronger and better.