AFR 23° SBC Cylinder Head 235cc Competition Package Heads, Spread Port Exhaust, 70cc Chambers
AIRFLOW RESEARCH
SKU #AFR-1134-TI
$3,820.95
AFR 23° SBC Cylinder Head 235cc Competition Package Heads, Spread Port Exhaust, 70cc Chambers
SKU
AFR-1134-TI
Qty
AFR 23° SBC Cylinder Head 235cc Competition Package Heads, Spread Port Exhaust, 70cc Chambers
The AFR 23° SBC Cylinder Head 235cc Competition Package Heads are designed to offer top-tier performance for high-demand racing applications. These heads are 100% CNC machined, ensuring precision and maximum airflow efficiency. With 235cc intake ports and 70cc combustion chambers, they are built to handle high RPM and extreme conditions. Ideal for serious drag racers and competitive drivers, these heads come equipped with premium components, including Titanium retainers, high-quality springs, and advanced valve technology. A true competition-grade upgrade for any engine looking for maximum power and efficiency.
Piston Specifications
- Piston Top: 100% CNC machined combustion chambers, intake ports, and exhaust ports for optimal airflow and performance.
- Approximate Compression Ratios:
- 70cc or 80cc combustion chamber sizes for custom tuning
- Engine Compatibility: Compatible with standard SBC applications, requiring shaft mounted rocker arms for precise valve train geometry.
- Engine Sizes Supported: Designed for high-performance engines with a minimum bore size of 4.000" and up to a 4.155" bore size.
Technical Details
- Material: A356 Aluminum for high strength and durability
- Intake Port Volume: 235cc
- Intake Port Dimension: 2.200" H x 1.290" W with 5/16" radius
- Exhaust Port Volume: 80cc
- Exhaust Port Dimension: 1.430" H x 1.540" W
- Combustion Chamber Size: 70cc or 80cc options
- Valve Cover Bolt Pattern: Perimeter bolt for standard fitment
- Valve Angle: 23°
- Deck Thickness: .750"
- Minimum Bore Diameter: 4.000"
- Spark Plug Dimensions: 14mm x .750" with gasket seat
Performance & Compatibility
These heads are engineered for maximum airflow and performance, featuring a competition 5-angle valve job for superior sealing and combustion efficiency. The included components, such as the PAC Racing springs, Titanium retainers, and bead lock valve keepers, ensure the heads are optimized for high RPM use (up to 8200 RPM). Additionally, the heads’ 60/40 valve spacing makes them compatible with shaft mounted rocker arms, ensuring the perfect valve train geometry. For drag race applications, .050 offset intake rockers can be used to further enhance performance.
Included Components
- 100% CNC ported combustion chambers, exhaust ports, and intake ports
- Competition 5-angle valve job for improved airflow and sealing
- 8mm bead lock intake valve (2.125" x 5.00" long O.A.L.)
- 8mm bead lock exhaust valve (1.600" x 5.030" long O.A.L.)
- PAC Racing Springs (1.550" OD solid roller dual drag race spring, 250 lbs on seat, .800" maximum lift, max RPM 8000-8200)
- 10° Titanium retainers (1.500” O.D x 1.120” I.D x .705” I.D)
- ARP 7/16" rocker studs
- Adjustable 5/16" guide plates
- Viton valve seals
- Ductile iron intake and exhaust valve seats
- 8mm bronze valve guides
AFR 23° SBC Cylinder Head 235cc Competition Package Heads, Spread Port Exhaust, 70cc Chambers
The AFR 23° SBC Cylinder Head 235cc Competition Package Heads are designed to offer top-tier performance for high-demand racing applications. These heads are 100% CNC machined, ensuring precision and maximum airflow efficiency. With 235cc intake ports and 70cc combustion chambers, they are built to handle high RPM and extreme conditions. Ideal for serious drag racers and competitive drivers, these heads come equipped with premium components, including Titanium retainers, high-quality springs, and advanced valve technology. A true competition-grade upgrade for any engine looking for maximum power and efficiency.
Piston Specifications
- Piston Top: 100% CNC machined combustion chambers, intake ports, and exhaust ports for optimal airflow and performance.
- Approximate Compression Ratios:
- 70cc or 80cc combustion chamber sizes for custom tuning
- Engine Compatibility: Compatible with standard SBC applications, requiring shaft mounted rocker arms for precise valve train geometry.
- Engine Sizes Supported: Designed for high-performance engines with a minimum bore size of 4.000" and up to a 4.155" bore size.
Technical Details
- Material: A356 Aluminum for high strength and durability
- Intake Port Volume: 235cc
- Intake Port Dimension: 2.200" H x 1.290" W with 5/16" radius
- Exhaust Port Volume: 80cc
- Exhaust Port Dimension: 1.430" H x 1.540" W
- Combustion Chamber Size: 70cc or 80cc options
- Valve Cover Bolt Pattern: Perimeter bolt for standard fitment
- Valve Angle: 23°
- Deck Thickness: .750"
- Minimum Bore Diameter: 4.000"
- Spark Plug Dimensions: 14mm x .750" with gasket seat
Performance & Compatibility
These heads are engineered for maximum airflow and performance, featuring a competition 5-angle valve job for superior sealing and combustion efficiency. The included components, such as the PAC Racing springs, Titanium retainers, and bead lock valve keepers, ensure the heads are optimized for high RPM use (up to 8200 RPM). Additionally, the heads’ 60/40 valve spacing makes them compatible with shaft mounted rocker arms, ensuring the perfect valve train geometry. For drag race applications, .050 offset intake rockers can be used to further enhance performance.
Included Components
- 100% CNC ported combustion chambers, exhaust ports, and intake ports
- Competition 5-angle valve job for improved airflow and sealing
- 8mm bead lock intake valve (2.125" x 5.00" long O.A.L.)
- 8mm bead lock exhaust valve (1.600" x 5.030" long O.A.L.)
- PAC Racing Springs (1.550" OD solid roller dual drag race spring, 250 lbs on seat, .800" maximum lift, max RPM 8000-8200)
- 10° Titanium retainers (1.500” O.D x 1.120” I.D x .705” I.D)
- ARP 7/16" rocker studs
- Adjustable 5/16" guide plates
- Viton valve seals
- Ductile iron intake and exhaust valve seats
- 8mm bronze valve guides
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