AFR - Airflow Research Eliminator 220 cc Small Head Bolt Cylinder Heads
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Chevy Small Block
220 cc Eliminator
Components
- Full CNC Ported Combustion Chambers
- Full CNC Ported Exhaust Ports
- Full CNC Ported Intake Ports
- Competition 5-Angle Valve Job
- Intake Valve, 2.100 in.
- Exhaust Valve, 1.600 in.
- Dual Valve Spring: Solid roller, 1.550 in. OD , .710 in. maximum lift, max RPM 7200-7400, 220 lbs. on seat
- Chrome Moly Retainers
- 10 Degree Valve Locks
- 7/16 in. Rocker Studs
- Adjustable 5/16 in. Guide Plates
- Viton Valve Seals: .600 in. OD x .495 in. ID
- Hardened Spring Cups: 1.550 in. OD x .780 in. ID
- Intake Valve Seats: Ductile Iron 2.200 in. OD, 1.750 in. ID, .375 in. Deep
- Exhaust Valve Seats: Ductile Iron 1.696 in. OD, 1.325 in. ID, .305 in. Deep
- 8 mm Bronze Valve Guides: .502 in. OD x 2.100 in. OAL
Head Specifications
- Head Torque w/Moly Lube: 65-70 ft.-lbs.
- Rocker Stud Torque: 55 ft.-lbs.
- Intake Port Gasket, 1.310 in. x 2.180 in. w/ 3/8 in. radius
- Fel-Pro 375-1206 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
- Exhaust Port Gasket: Fel Pro 375-1405
- Head Gasket: 350 ci Fel Pro 375-1003, 400 ci Fel Pro 375-1014
- Stud Girdle: Standard
- Spark Plug Starting Range Autolite 3910 (14mm x .750 in. Gasket Seat)
- Combustion Chambers: 75 cc
- Intake Port: 220 cc
- Exhaust Port: 80 cc
- Spring Pocket can be cut to 1.750, no deeper.
- Valve Spacing: Standard GM
- Rocker Arms: Standard
- Valve Angle: 23 Degree
- Angle Mill: .008 in. per 55 cc
- Flat Mill .006 in. per 60 cc
- Flat and Angle mills might require a .120 in. thick head gasket.
- Requires a minimum 4 in. Bore
Head Flow
Tested conducted at 28 in. of water pressure on Superflow 600 w/ 4.155 in. bore, 3/4 in. radius plate exhaust, 1 7/8 in. curved pipe
Intake:
- .200: 145
- .300: 207
- .400: 263
- .500: 299
- .550: 312
- .600: 316
- .650: 322
- .700: 326
Exhaust:
- .200: 120
- .300: 160
- .400: 214
- .500: 225
- .550: 229
- .600: 240
- .650: 244
- .700: 245
Specifications:
Motor Vehicles
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Electrical Cords
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