The case is sprayed with lubricant before the assembly process and the rotors are trial-fitted.

Next, the end plates were assembled

Then, it was back to the drawing board. In this case, the tolerances were just a bit too tight. Nate disassembled everything and shaved some more material from the strips.

Following just the right touches with the grinder, the rotor end caps were screwed in place. Then, an adjustable link holds both rotors together for final assembly.

Final assembly starts with the rotors and continues with end plates, extension shaft, drive, pulleys, etc.

The gears for the blower drive are set in place according to timing marks, much like the timing chain on your trusty old small-block. Years ago, blowers only had gears on the front end and they were much shorter in length. These immense 14-71s need gears on both ends, as they offer more stability and less deflection of the rotors.

More lubricant is sprayed inside the case, the rotors are turned with a ratchet to ensure they'll spin smoothly, and the tolerance is checked with a feeler gauge. In a nutshell, that's how a supercharger is assembled in the field.