Rochester 4BBL Quadzilla Quadrajet 840-900CFM Stage 4

Description

Features

• Surface baseplate for flatness and glassbead for bright silver finish.
• Choke pull-off modified for faster secondary air valve response.
• All vacuum ports plugged
• All idle and off-idle functions modified for long duration, low vacuum camshafts.
• All fuel circuits, air bleeds, and calibration components engineered to match specifications of YOUR engine to provide maximum possible HP&TQ; as well as response and consistency.
• All choke hardware removed and openings plugged
• 750 to 900 CFM available.
• 1 YR warranty all parts and labor
• .150″ Needle and seat assembly installed for maximum fuel delivery.
• Drill idle air bypass holes in primary throttle blades to maintain proper throttle blade angle at idle, ensuring proper function of idle and off-idle circuits.
• High capacity accelerator pump featuring materials that are resistant to alcohol and other additive commonly found in today’s fuel
• Install bushings in baseplate to eliminate any potential vacuum leaks at primary throttle shaft.
• Primary airflow is increased by 90 CFM!
• Strip to bare metal, inspect for defects, then apply dichromate coating for brilliant gold finish.
• Strip and cadmium plate all hardware, including throttle shafts, linkage, levers, spring and screws.
• Select only the highest flowing castings
• Select highest quality cores for best performance and reliability
• Secondary metering rods and hanger selected and high speed air bleeds resized for maxium full throttle horsepower and torque.
• Secondary fuel pull-over circuit modified to eliminate any potential sags, hesitations during initial secondary opening. This circuit acts as the “accelerator pump” for the secondaries and is critical to off-the-corner or starting line performance.
• Primary and secondary main wells resized and balanced for increased fuel flow capacity at high RPM.
• Secondary Booster venturi ring removed from primary by extensive hand modification.