There is still a place in the world for cast iron small-block Chevy heads. Lots of racing classes mandate iron cylinder heads and frankly, these puppies will probably outwork the lower-end aluminum stuff all day long.
Check the release below to learn more about these new pieces for your street or race motor.
RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads
New SBC 228cc runner heads from RHS™ provide maximum airflow for circle track & drag racing classes that require the use of cast iron cylinder heads
Engineers at RHS™ have recently designed the only Small Block Chevy 23-degree cast iron head that is CNC-ported from the factory. The precision accuracy and durability of the RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads are derived not only from the precision CNC-porting of the intake and exhaust runners but the CNC-ported combustion chamber, as well.
Before CNC machining even occurs, these revolutionary cylinder heads are designed using the RHS™ exclusive Clean Cast™ Technology to deliver superior port-to-chamber transitions for greater airflow. The CNC-ported 228cc intake and 82cc exhaust runners optimize volume, atomization and velocity while the 69cc combustion chambers are CNC-ported to relieve valve shrouding that occurs in “as cast” chambers when the edge of a valve is in close proximity to the combustion chamber wall. By CNC-machining the combustion chamber, RHS™ was able to improve the airflow efficiency of the cylinder heads.
The 2.055” multi angle intake and 1.600” radiused exhaust valve seats allow for superior airflow, thereby significantly increasing horsepower. In addition, these 23-degree SBC heads feature a refined water jacket for more even water flow to reduce engine “hot spots” and an extra-thick deck to allow angle milling. The thick deck surface also improves head gasket retention in boosted and nitrous applications. For racing classes that mandate cast iron head use, RHS™ has designed a race-winning cast iron head that utilizes the latest in cylinder head technology.
