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AFR - Airflow Research 1207
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AFR - Airflow Research Eliminator 227 cc Small Head Bolt Cylinder Heads

033-1207 NEW

made in usa
Free Shipping Ships directly from the manufacturer on 10/23/19
Save $10 off $199, $45 off $499, $100 off $999. Promo Code: FALLFUN exclusions apply

$2,365.00
AFR - Airflow Research Eliminator 227 cc Small Head Bolt Cylinder Heads $2,365.00
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Eliminator 227 cc Small Head Bolt Cylinder Heads
  • Small Block Chevy
  • Competioin Package CNC Porting
  • 65 cc Combustion Chambers
  • Spread Port Exhaust
  • Angle Plug
  • Assembled
  • Pair
  • Includes (4) 3/8 in. Head Studs
  • AFR - Airflow Research 1207 Details

    Chevy Small Block
    227 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
    • Steel  Retainers
    • 10 Degree Valve Locks w/ Lachcap recess
    • ARP 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

    • Requires shaft mount rocker arms for best geometry (.050 in. offset rockers in drag race applications only)
    • Head Torque w/Moly Lube: 65-70 ft.-lbs.
    • Rocker Stud Torque: 55 ft.-lbs.
    • Intake Port Dimension, 2.200 in. x 1.290 in. w/ 5/16 in. radius
    • Fel-Pro 375-1206 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
    • Head Gasket: 350 ci Fel Pro 375-1003400 ci Fel Pro 375-1014
    • Stud Girdle: Offset
    • Spark Plug Starting Range Autolite 3922 (14mm x .750 in. Gasket Seat)
    • Combustion Chambers: 65 cc
    • Intake Port: 227 cc
    • Exhaust Port: 80 cc raised .250 in.
    • Spring Pocket: 1.580 OD; Max Machine: 1.680 in. OD
    • Deck Thickness: .750 in.
    • Valve Spacing: 60/40
    • 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
    • Permeter bolt valve cover

    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: 152 
    • .300: 212
    • .400: 260
    • .500: 300
    • .550: 310
    • .600: 316
    • .650: 322
    • .700: 327
    • .750: 329

    Exhaust: 

    • .200: 120
    • .300: 160
    • .400: 214
    • .500: 230
    • .550: 234
    • .600: 238
    • .650: 241
    • .700: 243
    • .750: 245

    Specifications:

    Quantity
    Sold as a pair
    Cylinder Head Style
    Assembled
    Guideplates Included
    Yes
    Rocker Arm Studs Included
    Yes
    Accessory Bolt Holes Drilled
    Yes
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    CNC-Machined Combustion Chamber
    Yes
    CNC-Machined Exhaust Runner
    Yes
    CNC-Machined Intake Runner
    Yes
    Damper Spring Included
    Yes
    Exhaust Valves Included
    Yes
    Heat Crossover
    No
    Intake Valves Included
    Yes
    Locks Included
    Yes
    Machined for O-Ring
    No
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arms Included
    No
    Steam Holes Drilled
    No
    Valve Guides Included
    Yes
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seals Included
    Yes
    Combustion Chamber Volume (cc)
    65
    Intake Port Location
    Standard
    Exhaust Port Location
    Raised
    Oiling Style
    Through head
    Intake Valve Diameter (in.)
    2.1
    Exhaust Valve Diameter (in.)
    1.6
    Valve Guide Material
    Manganese bronze
    Intake Runner Volume (cc)
    227
    Valve Seat Material
    Ductile iron
    Valve Cover Mounting Style
    Perimeter bolt
    Exhaust Port Shape
    Round
    Intake Valve Angle
    23
    Valve Seat Machine Style
    5-angle intake/3-angle exhaust
    Exhaust Runner Volume (cc)
    80
    Outside Diameter of Outer Spring (in.)
    1.55
    Maximum Valve Lift (in.)
    0.71
    Number of Springs Per Valve
    Single
    Retainer Material
    Chromoly steel
    Lock Style
    10 degree
    Exhaust Valve Angle
    23
    Intake Port Shape
    Rectangular
    Spark Plug Style
    Angled
    Combustion Chamber Style
    Heart
    Valve Stem Seal Style
    Positive stop
    Rocker Arm Nut Thread Size (in.)
    7/16"-20
    Guideplate Pushrod Size (in.)
    5/16"
    Shipping Weight:
    68

    Increased Cylinder Head Material for Maximum Race Endurance

    AFR Eliminator Small Head Bolt Aluminum Racing Cylinder Heads feature the same exact features of their standard counterparts, but with added structural strength. The smaller head bolt design provides an extra 1/16 in. of material to thin areas of the cylinder head for handling high compression, high cylinder pressures,  alcohol fuel, and severe endurance applications.  

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.