3000 Top End

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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.

3000 Top End
Code: CENG999AB
Sku: CENG999AB
Availability: In Stock
CENG999AB
£1,950.00
Qty
Code: CENG999AS
Sku: CENG999AS
Availability: In Stock
CENG999AS
£2,250.00
Qty
Code: CENG999AR
Sku: CENG999AR
Availability: In Stock
CENG999AR
£2,950.00
Qty
Code: CENG999AF
Sku: CENG999AF
Availability: In Stock
CENG999AF
£3,250.00
Qty

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.

3000 Top End
Code: CENG990
Sku: CENG990
Availability: In Stock
CENG990
£1,850.00
Qty
Code: CENG990A
Sku: CENG990A
Availability: In Stock
CENG990A
£1,295.00
Qty

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.

3000 Top End
Code: CENG602A
Sku: CENG602A
Availability: In Stock
CENG602A
£225.00
Qty

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.

3000 Top End
Code: CENG720
Sku: CENG720
Availability: In Stock
CENG720
£19.95
Qty
Code: CENG720S
Sku: CENG720S
Availability: In Stock
CENG720S
£16.95
Qty
Code: CENG721
Sku: CENG721
Availability: In Stock
CENG721
£18.95
Qty
Code: CENG721S
Sku: CENG721S
Availability: In Stock
CENG721S
£16.95
Qty

ROCKER OIL FEED PIPE - 6 CYLINDER

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

3000 Top End
Code: ENG712
Sku: ENG712
Availability: In Stock
ENG712
£29.50
Qty

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.

3000 Top End
Code: CENG735
Sku: CENG735
Availability: In Stock
CENG735
£1.09
Qty
Code: CENG735W
Sku: CENG735W
Availability: In Stock
CENG735W
£1.99
Qty

VALVE COLLETS

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

3000 Top End
Code: ENG733
Sku: ENG733
Availability: In Stock
ENG733
£3.95
Qty

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.

3000 Top End
Code: ENG725HD
Sku: ENG725HD
Availability: In Stock
ENG725HD
£36.75
Qty
Code: CENG725
Sku: CENG725
Availability: In Stock
CENG725
£225.00
Qty

BIG BORE MANIFOLD GASKET - 6 CYLINDER

Top quality material with larger port holes.

3000 Top End
Code: CENG759
Sku: CENG759
Availability: In Stock
CENG759
£19.00
Qty

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.

3000 Top End
Code: CENG722
Sku: CENG722
Availability: In Stock
CENG722
£16.95
Qty
Code: CENG722A
Sku: CENG722A
Availability: In Stock
CENG722A
£16.95
Qty
Code: CENG722C
Sku: CENG722C
Availability: In Stock
CENG722C
£0.19
Qty

A Little About Us...

Company Info

Welcome to the Denis Welch Motorsport website for Performance Parts. We cater for every aspect of work on your classic car be it road, race or rally, using our unrivalled success in many aspects of Motorsport to make your car as successful and reliable as possible.

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Contact Details

Parts Hotline +44(0)1543 472244
Office +44(0)1543 472214
Fax +44(0)1543 472339
E-Mail sales@bighealey.co.uk
 

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