Inside a 416EX    

The picture above is a 416EX motor.  As you can see, this is an example of a motor that had a "Fatality" while being injected with a Nitro-Oxide System (NOS).

If you examine the connecting rod (the rod that connects the piston to the crank) you can see the HONDA part # HN1 on the side of the rod.  Obviously, the stock HONDA rod is not designed to take any additional horsepower that NOS provides.  Horsepower is located in the upper RPM's curve of the motor, and TORQUE is in the lower RPM's of the motor.  This is why most "Beefed" up motors have hardened connecting rods and welded cranks.  Hardened connecting rods are heat tempered to add additional strength to prevent the rods from breaking under high horsepower and TORQUE loads.  Welded cranks keep the crank from separating under severe "Poundings" and high RPM's.

After inspecting the motor, it was apparent that the increased horsepower that the Nitro gave proved to much for the stock connecting rod.  The rod was "The Weakest Link."  Within a few micro-seconds after the rod snapped, the rod probably  caught the bottom of the piston sleeve and stopped the motor "Dead."  This sudden stop of the broken rod against the sleeve caused the sleeve to crack and break.  The photo above shows a piece of the cracked sleeve to the left of the timing chain.  This sudden stop and increased TORQUE on the crank transferred to the Counter-Balancer causing it to twist back and shear.  The photo above shows the counter-balancer separated from the counter-balancer gear in the case of the motor.  These two parts are manufactured as one piece, and the TORQUE of the motor at "Fatality" caused the catastrophic chain of events to occur.  Last in line to suffer damage was the piston.  The rod snapping at roughly 10,000 RPM and the last fuel detonation slammed the piston as far down into the motor as possible.

Overall, ~$500 will bring this motor back to life.  Not that bad considering that the upper limit of a stock motor (416 close to stock) is ~55 HP as reported on the dyno chart.  Yes, that's correct, this 416EX died on the dyno at 55HP.  The NOS "Crash" has on this motor was a 25HP shot.  That means when he hits the trigger switch the NOS engages and inserted an additional 25 HP on top of the 42HP he had with the 416EX.  Incredible, the 416EX Crash built had 42HP on a certified dyno.  That's Amazing!  Well, because of this we were also able to identify the upper limits of the 400EX motor (with a stock rod)!!

By the way, this was Crash502EX's backup motor.  His primary THUMPER is the 502EX and has been freshly rebuilt.  Crash has also decided to sell his NOS, any buyers?  Check out the dyno results and his AWESOME quad in "Readers Ride."