Update everyone -
The guy who dyno'd our motor assured us we didn't need to retorque the heads after running 13 pulls. He was incorrect. After all this messing around, then blowing white steam out the driver's sidepipe, we started exploring some alternative answers.
I removed the driver's bank valve cover to find
oil paste. It looked like a frappe of
oil and water (or coolant). First thought - blown head gasket. But, I figured - what the hell, check the torques just to be sure, and some of the central bolts were around 30 lb-ft.
Retorqued everything to spec and ever since - cool as anything. Problem solved. Looks like the head gasket seal was compromised but not blown. Correct torque is imperative.
So - moral of the story...well morals...
1) Gotta retorque after a hard day on the dyno (on a fresh engine build at least)
2) It's more fun to drive real real fast when you're not worried about melting the engine.
