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AFR - Airflow Research 1074NP - AFR Small Block Chevy 227cc Eliminator Race Aluminum Cylinder Heads

AFR - Airflow Research 1074NP - AFR Small Block Chevy 227cc Eliminator Race Aluminum Cylinder Heads

AFR - Airflow Research#033-1074NP

227cc Eliminator Race Aluminum Cylinder Heads
  • SB-Chevy
  • Race Ready CNC Porting
  • 65cc Combustion Chambers
  • Spread Exhaust Port Configuration
  • Angle Spark Plug
  • Bare Head Only
  • Sold in Pairs, 2/pkg.

    AFR - Airflow Research 1074NP - AFR Small Block Chevy 227cc Eliminator Race Aluminum Cylinder Heads Details

    Race Ready CNC Porting Eliminator Heads

  • Spread Exhaust Port Configuration
  • 227cc Intake Port
  • 80cc Exhaust Port

    This is an unassembled bare cylinder head with valve guides and valve seats installed only. Does not include any parts such as valves, springs, spring components, studs or guideplates.

    Small Block Chevy 227cc 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 Size - 2.100'' (Valve not included)
    Exhaust Valve Size - 1.600'' (Valve not included)
    Intake Valve Seats
    Exhaust Valve Seats
    Bronze Valve Guides
    Small Block Chevy 227cc Eliminator Race Head Specifications
    Head Torque w/Moly Lube 65-70 Ft. Lbs.
    Rocker Stud Torque 55 Ft. Lbs.
    Intake Port Gasket, 1.310'' x 2.180'' w/ 3/8'' radius Fel-Pro 375-1206 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
    Exhaust Port Gasket Fel Pro 375-1405
    Head Gasket 350ci Fel Pro 375-1003
    400ci Fel Pro 375-1014
    Head Bolts & Studs Standard ARP
    Head Bolt Washers Manley Standard
    Stud Girdle AFR Offset 033-6208
    Suggested Manifold AFR p/n 033-4801, AFR p/n 033-4802 or Edelbrock Vic Jr p/n 350-2975 or Super Victor p/n 350-2925
    Spark Plug Starting Range Autolite 3910
    Combustion Chambers 65cc
    Intake Port 227cc
    Exhaust Port 80cc
    Spring Pocket can be cut to 1.680, no deeper.
    Valve Spacing 60/40
    Rocker Arms .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.

  • AFR - Airflow Research 1074NP - AFR Small Block Chevy 227cc Eliminator Race Aluminum Cylinder Heads

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

    High flowing AFR 227cc intake port 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 65cc or 75cc 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. These 227cc aluminum cyilnder heads are available in either standard port or spread port exhaust configurations. Spread port heads have the center exhaust ports spread apart 5/8'' over stock L98 GM heads. The reason for spread port heads is to achieve additional cooling in the center of the head where the heat concentration is greatest. As standard headers do not fit, spread port headers are required since the center ports are spread further apart then stock GM products. The increased spacing on the exhaust port also requires the use of exhaust gasket Fel-Pro p/n 375-1409. Spread port heads only come with a Stahl bolt pattern. AFR's spread port head has all the benefits and features of AFR's standard head. Made in USA.

    227cc 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
  • 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
  • Standard or Spread Port Exhaust Bolt Pattern

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