Page 466 - 2021-22_EngineCatalogAP

PISTON PIN LOCKS
Piston Pin (Spiral) Locks
.990" x .042"
Part No. Qty.
JEP990-042-CS 1 WISCS-25 4
WISCS-25
ROTATING ASSEMBLIES
Street & Strip Assemblies with Cast Crankshaft
Unbalanced Assemblies
For applications up to 500 horsepower. Recommended for use in pump gas, street engines. No power adders. Kit includes cast
steel crankshaft (use 2-piece rear main
seal), bushed H-Beam connecting rods, KB Hypereutectic, SRP, or Mahle 4032 forged pis- tons, Perfect Circle rings, and Clevite 77 rod and main bearings. Each kit part number is specified by bore size. Flexplate/flywheel and balancer
not included. Requires balancing at a professional machine shop. Eagle Specialty products reserves the right to substitute parts due to availability.
Oldsmobile 455
Kit includes "ESP" H-Beam 3-D connecting rods. Compression ratios are based on a 77cc combustion chamber. Requires balancing.
Part No.
EAG42105030 EAG42105060
Cubic Bore Inch Size 488 4.155" 495 4.185"
Stroke
4.500" 4.500"
Rod Balance Length Needed 7.100" Ext. 7.100" Ext.
Piston
Type
4032 Mahle/Inv. Dome -22cc 4032 Mahle/Inv. Dome -22cc
Piston Rings File-Fit File-Fit
Comp. Ratio/77cc 10.0:1 10.0:1
CYLINDER HEADS
Aluminum Cylinder Head
Affordable aluminum cylinder head, engineered for Olds 400-455 engines, delivers improved flow and performance. Designed for applications with up to .615" valve lift, heads are assembled with 2.072" intake and 1.680" exhaust valves, dual valve springs, chrome-moly steel retainers, and 10° valve locks. Requires 3/8" rocker studs and roller rocker arms.
Part No. Description
SPMPCE281.2152 Assembled, 1.45" Springs, Hydraulic Flat Tappet, 140 lb. Seat Pressure, .615" Max Lift
Intake Runner
188cc
Comb. Chamber
Valve Angle
Intake Valve
Exhaust Valve
1.680"
464 2021-22 ENGINE BUILDER CATALOG
77cc
18°
2.072"
JEP990-042-CS
OLDSMOBILE 260-455