Reply to "Nitrous?"

I have no experience with nitrous, but I can share a bit about the durability of the 351C castings.

The 351C was designed for endurance racing at 515 horsepower and 7200 rpm, naturally aspirated. I have high confidence with the motor within those limits, as long as it is balanced and blueprinted properly. The crankshaft is actually the toughest part of the motor, its good for ~800 BHP and 10,000 rpm naturally aspirated. The block is the weakest part of the motor, it was intentionally made thin to make it light, just enough material was used for 500+ horsepower and ~7400 rpm naturally aspirated; it is prone to cracking the cylinder walls and the bulk heads above the main bearing saddles at higher rpm or even at lower rpm if it isn't prepared properly. The block will normally break before the crankshaft does. However guys seem to keep the block alive in recreational applications using nitrous, super charging or turbo charging up to around 800 BHP IF they keep the maximum rpm down. Dave Dodeck is one such guy. I wouldn't expect it to survive the abuse of road racing/endurance racing at 800 BHP for very long however.

-G