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AFR - Airflow Research 1076

227cc LT4 Eliminator Street Aluminum Cylinder Heads SB-Chevy

AFR - Airflow Research 1076

033-1076

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Ships 12/30/16 if Ordered Today
AFR - Airflow Research 1076 227cc LT4 Eliminator Street Aluminum Cylinder Heads SB-Chevy $2,095.20
227cc LT4 Eliminator Street Aluminum Cylinder Heads
  • SB-Chevy
  • Race Ready CNC Porting
  • 58cc Combustion Chambers
  • LT4 Angle Spark Plug
  • Assembled
  • Sold in Pairs, 2/pkg.

  • AFR - Airflow Research 1076 Details

    Race Ready CNC Porting LT4 Eliminator Heads

    Small Block Chevy 227cc LT4 Eliminator Race Basic Package Components
    100% CNC Ported Combustion Chambers
    100% CNC Ported Exhaust Ports
    100% CNC Ported Intake Ports
    Competition 5-Angle Valve Job
    Intake Valve, 2.100'' x 5.006'' o.a.l.
    Exhaust Valve, 1.600'' x 5.024'' o.a.l.
    1.550'' OD Solid Roller Dual Valve Spring, 225 lbs. on seat, .710'' maximum lift, max RPM 7200-7400
    10º Manley 4140 Chrome Moly Retainers
    10º Valve Locks
    ARP 7/16'' Rocker Studs
    Adjustable 5/16'' Guide Plates
    Viton Valve Seals
    Hardened Spring Cups
    Intake Valve Seats
    Exhaust Valve Seats
    Bronze Valve Guides
    Small Block Chevy 227cc LT4 Eliminator Race Head Specifications
    Head Torque w/Moly Lube 65-70 Ft. Lbs.
    Rocker Stud Torque 55 Ft. Lbs.
    Intake Port Gasket, LT4 AFR 033-6860 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
    Exhaust Port Gasket Fel Pro 375-1405
    Head Gasket LT4 Fel Pro 375-1074
    Head Bolts & Studs Standard ARP
    Head Bolt Washers Manley Standard
    Stud Girdle Standard
    Suggested Manifold LT4
    Spark Plug Starting Range Autolite 3910
    Combustion Chambers 58cc
    Intake Port 227cc
    Exhaust Port 80cc
    Spring Pocket can be cut to 1.680, no deeper.
    Valve Spacing 60 / 40
    Rocker Arms T&D .450'' Offset Shaft Mount
    Valve Angle 23°
    Angle Mill .008'' per cc
    Flat Mill .006'' per cc
    NOTE: Flat and Angle mills might require a .120'' thick head gasket.

    Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    Yes
    CNC-Machined Exhaust Runner
    Yes
    CNC-Machined Intake Runner
    Yes
    Combustion Chamber Style
    Heart
    Combustion Chamber Volume (cc)
    65
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Raised
    Exhaust Port Shape
    Square
    Exhaust Runner Volume (cc)
    80
    Exhaust Valve Angle
    23
    Exhaust Valve Diameter (in.)
    1.6
    Exhaust Valves Included
    No
    Guideplates Included
    No
    Heat Crossover
    Yes
    Intake Port Location
    Standard
    Intake Port Shape
    Rectangular
    Intake Runner Volume (cc)
    227
    Intake Valve Angle
    23
    Intake Valve Diameter (in.)
    2.1
    Intake Valves Included
    No
    Lock Style
    10 degree
    Locks Included
    No
    Machined for O-Ring
    No
    Number of Springs Per Valve
    Dual
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.55
    Quantity
    Sold as a pair
    Retainer Material
    Chromoly steel
    Retainers Included
    No
    Rocker Arm Nut Thread Size (in.)
    7/16"-20
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Spark Plug Style
    Angled
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Perimeter bolt
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    3-angle
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    Yes
    Valve Springs Included
    No
    Valve Stem Seals Included
    No
    Manufacturer's Part Number:
    1076

    Timeless Design - The First in AFR's Line
    with 60/40 Valve Spacing

    High flowing AFR 227cc intake port LT4 small block Chevy angle plug aluminum cylinder heads are available in two stages of performance. The Race Ready version features 100% CNC ported intakes while the higher flowing Competition version features 100% CNC ported intakes with greater detail. Both come with 100% CNC ported 58cc combustion chambers and 80cc exhaust ports with a 3/4'' thick head deck (ideal for nitrous or blower applications). Standard valves are lightweight 8mm diameter stem, 2.100'' intake and 1.600'' exhaust with AFR's hardened ductile iron interlocking valve seats. The 227 has 60/40 valve spacing and piston valve pockets should be checked. The exceptional flow characteristics and 23° valve angle make this the perfect head for 350-434ci engines in drag cars, sprint cars, and late model oval trackers operating from 4500 rpm and up. If you choose to run stud girdles AFR offset girdles are required. These heads requires shaft mount rockers or .050'' offset rocker arms for durability and reliability of valve train components. With the .050'' offset the intake rocker arm will be at a slight angle and the roller tip will not be perfectly parallel or centered on the valve tip. Not recommended for street use, unless shaft mount rocker is used. The exhaust port and bolt pattern are raised .250'' over GM L-98 cylinder head, this rarely affects header or chassis fitment. Made in USA.

    227cc LT4 Eliminator Race Cylinder Head Features:
  • 100% CNC Ported Combustion Chambers
  • 100% CNC Ported Exhaust Ports
  • 100% CNC Ported Intake Ports
  • Competition 5-angle Valve Job
  • 227cc Intake Ports
  • 58cc Combustion Chambers
  • 80cc Exhaust Ports
  • Bead Lock Intake Valve, 2.100'' x 5.006'' Overall Valve Length
  • Bead Lock Exhaust Valve, 1.600'' x 5.024'' Overall Valve Length
  • PAC Racing Valve Spring: 1.550'' OD Solid Roller Dual Valve Spring, 225 lbs on seat, .710'' maximum lift, Max RPM 7200-7400
  • 10° Manley 4140 Chrome Moly Retainers
  • 10° Bead Lock Valve Keepers
  • 7/16'' Rocker Studs
  • Adjustable 5/16'' Guide Plates
  • Viton Valve Seals
  • Hardened Spring Cup
  • Intake Valve Seats
  • Exhaust Valve Seats
  • Bronze Valve Guides

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