On teardown I was told:
Hey Everyone,
I have the disassembly finished up on the block and have attached pictures of what I found.
The ultimate demise of the engine was the cracked cylinder. The cylinder eventually hydro-locked bending the rod. From the pictures you can see the engine "tune"...
Car made 630ish on 93 octane to the wheels. I was advised to update the OPG's, which I did. The teardown showed nothing wrong with the tune (Whipple can tune). Yes, you can run your car with the stock rods/pistons but it's a ticking timebomb, in my opinion. I've ordered a forged short-block...
Warning to all who want to install at Whipple Stage 2 into their non-forged rod/piston S550!!! At only 6k miles my engine failed. Analysis at teardown: Bent rod, friction on the piston sleeve, sleeve failure at the weak part of the block, block failure at the water jacket. Long story short...