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Oldsmobile 400 425 455 188cc 77cc Hydr-FT Complete Aluminum Cylinder Heads

SKU: PCE281.2152


Part Number: PCE281.2152
Part Type:Cylinder Heads
Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc): 77 cc
CNC-Machined Combustion Chamber:No
Intake Runner Volume (cc): 188 cc
Exhaust Runner Volume (cc): n/a
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Intake Port Shape: Rectangular
Intake Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Location: Standard
Spark Plug Style: OEM
Comp. Valve Job: No
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.072 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.680 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.615 in.
Outside Diameter of Outer Spring (in):1.450 in.
Damper Spring Included:Yes
Number of Springs Per Valve:Dual
Retainers Included:Yes
Retainer Material:Chromoly steel
Locks Included:Yes
Lock Style:10 degree
Valve Stem Seals Included:Yes
Valve Stem Seal Style:Positive stop
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Valve Cover Mounting Style: Center & Perimeter Bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 18 deg.
Exhaust Valve Angle: 18 deg.
Valve Guides Included: Yes
Valve Guide Material: Bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Quantity:Sold as a pair.
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Assembly Specifications
Max Lift: .615
Coil Bind: .1.125
Intake Install: 140lbs @ 1.8
Exhaust Install: 140lbs @ 1.8
Closed Sear Pressure: 145lbs
Open Seat Pressure: 345lbs