He bought this motor assembled from someone else. When we talked yesterday, we said it let go about 5 lbs on the footbrake. Surely the eagle rods alone aren't the cause.Lesson learned, Don't use eagle rods in a stage motor.
I just had an R&D engineer look at this and he says it looks like the rod ripped away due to a stuck piston. Bore looks a tad scuffed too. He thinks a clearance issue or the piston heated up (expanded) way quicker than the bore due to the exhaust temps from building boost.
I had the car in my shop a couple weeks ago building a downpipe and other little bits. While It was there I changed the oil and it had zero trash in the oil other than excess fuel from a previous stuck injector. Richard thinks it has maybe 500 miles on it before he got it and the most he and I had done was move it in and out of the trailer. It broke while he was spooling the turbo against the footbrake. What's left of the pin/rod/piston is seized up. What else could cause it to break a rod like that? It certainly didn't brake from too much power or rpm. I supposed there could have been a major flaw inside the rod, but even then it shouldn't have broken with almost no load unless the wrist pin was locked up.
I hate this for Richard because it's a really slick car with lots of potential and a really cool set of iron 14 bolt production style heads on it. It killed a like new 4.1 off center stage 2 block and frustrated the heck out of him.
We haven't proven that.This POS rod just took out your stage 2 block?
Just out of curiosity,did this happen to the same cylinder that had the stuck injector?
Why would you come in here just to cuss at everyone?bye bye stage hello lsx.
normally for a floating pin i aim for 4 to 7 tenths ------- pin clearance on the broken cylinder measured 2.9 thou------ much looser than i would ever allow but i don't think it would cause this to happen especially in a turbo engine