Hey Sean, any idea what caused the motor to throw a rod? What was the mileage, what were you doing when it happened, etc.
Since I have very much the same motor as you it's good data.
Exactly what I built the engine for, Sweep.......DATA
I used the stock F3 rods and had them shot peened, polished, and finished to matching weights. I used new F3 rod bolts/nuts torqued to spec (18.1 ft/lbs?). I had the Dyna 2000 limiter set at 10,500rpm and hit it often.
Engine had 20,000 miles on it when the rod cut loose. I was doing successive sprints on a long,straight, empty road i.e. slow to 20mph then run through the gears to 120mph, slow to 20mph, repeat. On the third time it came apart. I was not kind to this motor, and expected failure at some point.
The head was busted off one rod bolt, but not sure if this was cause or result. Judging by the remnants of the plain bearings, I would guess that I spun the rod bearing and failure followed immediately. The crank journal looks pristine except for the divot the rod punched as it skipped off
I'm replacing the crank,rod, sleeve, piston and cases. Setting the limiter at 9500 this time and hoping for another 20,000