Before the advent of fuel injection systems various carburetor designs were used. For V8's, the carbs of choice were either the Rochester 2-Barrel or the QuadaraJet 4-Barrel. In the QuadaraJet,carburetor there was a small piston assembly sitting in a fuel well. Q1: What was the name of this small piston assembly? Q2; What was it's function with respect to the metering rods? This question is NOT open to any Engineering Discipline. Remember, your response goes into a queue so there will be a delay in the appearance of your response.