Speedmaster Cast Aluminum Cylinder Head Big Block Chevy 454 w/Hydraulic Roller Cam
746-PCE281.2033
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Big Block Chevy - Assembled
Special Note: Camshaft and Lifters Not Included
Assembly Specifications
Max Lift: .580
Coil Bind: .740
Intake Install: 145lbs @ 1.9
Exhaust Install: 145lbs @ 1.9
Closed Seat Pressure: 145lbs
Open Seat Pressure: 360lbs
As with all Speedmaster cylinder heads, our Big Block Chevrolet heads are Gravity Die Cast . This casting process creates a much more uniform and robust cylinder head. With the increasingly large displacements becoming common, the need for more airflow is necessary. If you are looking to build a 400-500+hp engine, give our PCE281.1489 heads a try. They offer a smaller cross - section to increase the incoming air s velocity, resulting in great driveability, power and economy. On engines over 500hp, use the rectangle port PCE281.1488 heads. The mid-size cross section works well on engines under 540cu.in and under 7000RPM. If you are working on a larger, or higher RPM engine, step up to the CNC ported PCE281.1511 heads. The added volume of the PCE281.
Specifications:
Will these work with stock location headers
What is the torque on the head bolts
Will the factory pushrods and lifters on a gen 6 7.4 work with these heads?
Will this work on Mark VI Block?
Will a cam with .558 lift work?
Will this work on a Mark 4 block, late 70's?
Is this for a pair
What happens if you use a hydraulic flat tappet cam with cam?
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