Originally Posted by
Christian and Beccy
Chip,
As you well know, a NOS shot will increase the torque whilst it is in and it's torque that those standard rods don't like. Lets not forget that the OE RST rods aren't any different to normal CVH that were designed for lawnmower horsepower levels.
I would be surprised if it wasnt shock loads from detonation or excessive bearing wear that caused that failure rather than just a smooth application of torque.
rods (even weak ones) rarely fail through torque alone unless its a very extreme example, which this application doesnt sound.