2.4l Opel 8V CIH Competition Engine

Cylinder Head Specification

The cylinder head originally came from a Vauxhall Carlton 2.2l engine.  This head is very similar to the 2.0L Manta head, except that the inlet ports sit higher in the head and it has larger valves, so giving better airflow as standard.

The design requirement for the head was that it should run on Super Unleaded Petrol, and should maximise the torque to be delivered by the engine throughout the rev range.

With this requirement in mind, the head was given to SP Performance.  The "Manta SP1" special profile camshaft was manufactured by Kent from one of their OP camshaft blanks,  this means that this camshaft is made from the same blank as say, a Kent OP234 camshaft.  The camshaft profile and the cylinder head work comes as a complete package developed using the SP Performance patented "Flow Passage Control" technology.

The final specification for the 2.2l head is as follows:

Bronze valve guides
Stainless Steel Inlet & Exhaust valve seats
47mm Inlet Valves with 8mm wasted stems
36mm Exhaust Valves with 8mm stems
Kent Camshaft with Special Profile "Manta SP1"
Kent VS26 valve springs
Kent CF21 Camshaft Followers
Special Steel Valve Spring Seats
Crower Steel Valve spring Caps (for 8mm Stems)
Kent Vernier Camshaft Pulley

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Last updated: Tuesday, 03 December 2002.