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ALUMINIUM CYLINDER HEADS - 6 CYLINDER

Since 1995 we have been successfully producing our aluminium cylinder heads.  In 2003 we took the decision to upgrade our product. We went back to the drawing board and started with completely new CAD drawings to ensure accuracy and perfect detail in our product. We then further enhanced this ‘design to manufacture’ investment philosophy by including state of the art CAM software. When it comes to machining we have seen a huge upgrade to our capabilities with the acquisition of a brand new 5 axis CNC machining centre. For more information on our new cylinder heads and how we can improve your cars performance please see below or contact our Sales personnel.

TYPES OF CYLINDER HEADS

• BARE HEAD Fully machined bare head (as cast ports) with valve inserts fitted and semi formed seats. Ready for you to supply and fit valve guides, cut seats, final skim head gasket face and assemble with your components. Totally interchangeable with all things standard.

• STANDARD COMPLETE Supplied ready assembled by us in our own factory. Bronze valve guides, stainless steel valves, steel valve top caps and heavy duty springs etc. All as listed on page 24. Head gasket face final skimmed giving a combustion chamber of 52cc as original.

• FAST ROAD COMPLETE As ‘Standard’ with the addition of CNC machined ports, all symmetrical and matching. Aluminium valve top caps, competition valve springs and top hat stem seals. 50cc chamber volume to slightly increase the compression ratio.

• FULL RACE COMPLETE As ‘Fast Road’ with larger CNC machined ports, for increased flow. They also benefit from dowel holes machined in manifold face to match the inlet manifolds precisely to the ports.  Both inlet and exhausts ports are hand felted after CNC machining to achieving the desired surface finish and gas flow characteristics. 46cc chamber volume for increased compression ratio.

6 CYLINDER IRON HEADS - EXCHANGE

TYPES OF IRON HEADS

• STANDARD COMPLETE
  An original head reconditioned with all new components and unleaded valve seats fitted. Head gasket face ground and 52cc chamber volume for standard compression.

• FAST ROAD
  As above with gas flowed ports, a blend of CNC porting and hand gas flowing. 48cc chamber volume for slightly increased compression ratio.

PLEASE NOTE: if intending to use with our roller rockers (CENG502K) please specify with order to have push rod holes machined to suit.
Any chamber volume available if specified with order. Please note there is a surcharge of £500.00 on old units.

All our inlet manifolds are now also available CNC ported along with dowel holes to match seamlessly to our cylinder heads.

COMPETITION HEAD GASKET

With the loss of the British made Payen Head Gasket for the Healey 3000 and now only cheap imitations to choose from, we decided to invest in the very latest design.

Using modern manufacturing techniques means this three layer, all steel gasket is the best on the market. It has been made solely for us on dedicated tooling at considerable expense in Japan.

Whether used on high compression race engines or simply to ensure your road car is reliable, this new gasket is more than adequate to do the job. Being 0.039” (1.0mm) thick the same thickness as original it does not change the compression ratio and suiting bores up to 3.366" (85.5mm) diameter.

This gasket may also be re-used up to three times.

VALVES

All our valves are made from one-piece forgings in 214N stainless steel with stellite tips and plasma nitrided stems for increased life.

Suitable for both leaded and unleaded fuel.

These are made to the lightest design using standard size stems and collets.

ROCKER OIL FEED PIPE - 6 CYLINDER

A faithful reproduction of the original. Manufactured in our own factory.

VALVE STEM OIL SEALS

These are top hat type oil seals which fit around the top of the valve guide. We offer Black which feature a rubber case and are suitable for single valve springs or Green which have a metal case and are suitable for single or double valve springs.

VALVE COLLETS

We have had these made to the highest tolerances from EN24T steel and heat-treated. Also a direct replacement for the standard.

COMPETITION VALVE SPRING SET

These give increased seat and nose pressure.

ENG725HD - Double springs to suit std & fast road cams.
CENG725 - Single springs to suit higher performance cams.

BIG BORE MANIFOLD GASKET - 6 CYLINDER

Top quality material with larger port holes.

COLISBRO-BRONZE VALVE GUIDES

These are essential in all engines with gas flowed ports whether aluminium or iron and engines converted to lead-free fuel.
Precision turned with honed bores these should not require reaming after fitment. Colisbro material being of a copper colour should not be confused with the inferior yellow brass coloured cheaper alternatives.

Now available - Tapered Bronze Value Guide.