CNC engineered gas flowed cylinder heads

Nissan Skyline R32 – R33 – R34 (Big Valve)







This engine has massive tuning potential and the Nissan Skyline engine has been on our intended development schedule for some time. We were commisioned to build several Skyline engines for clients so this cylinder head was given the full treatment.

We currently (Nov 2008) developing a Big valve version of this head. Again we looking for maximum BHP without using very high levels of boost. Current predictions (based on gas flow achieved so far) is that this head will produce 900 BHP at around 1.6 bar boost. Alternatively if you run lower boost we expect very good power throughout the rev range. Call us for further update on this development or any other Skyline tuning requirements.
Cost estimate for this head is £1850.00 + vat on an exchange basis. (£500 exchange). Valves are extra (please call for details)

A ‘taping’ service is also available for this head at an additional cost of £100 which will give the final hand finish to the ports and provide a further 1% flow.
Note : flow diagrams show flow against specific valve openings at 0.050 inch valve openings at 25″ pressure. Therefore actual flow volume increase is measured as the area under the graph (indicated in yellow for inlet and blue for exhaust). Standard valve sizes are used on our heads unless specified as a big valve version. Tests shown here are carried out on a flow bench on a bare head without filters. Therefore the difference between a standard engine with standard inlet ducting and filters will be larger than shown here.

See below for the full reports as generated by our gas flow bench and Port Flow Analyzer software. Click on the image for full size image:



Call us on +44 (0)161 483 4810 or email on SALES @ CNCHEADS.CO.UK . Check out our FREQUENTLY ASKED QUESTIONS PAGE for more information.

Custom made CamshaftsWith all of our gas flowed heads we also provide a custom made camshaft service. These camshafts are designed to optimise the flow characteristics of our heads. They can also be specifically designed to deliver the power characteristcs you require for your specific application.Your existing camshaft will work with our heads, however, if you want to get the most from one of these heads or you have a particular power characteristc you are looking for, we recommend that you consider our custom camshafts.Price £500 + vat


We are happy to discuss and advise on any aspect of modifying your engine with one of our heads to achieve the results we predict above. We can also supply the best quality gaskets, camshaft, valves, valve springs and head bolts to go with your new cylinder head. We also specialise in electronic engine management, carb and fuel injection , turbo and supercharger systems. We build race engines too. Built and tested on our own 1000bhp Engine Dyno. We can also fit your head to your engine if required and test your vehicle on our rolling road.

What ever your requirements, race, track day or fast road, we have a full range of the latest and best performance products and techniques. Our competition results year on year prove we have the expertise to make your car competitive at what ever class you chose to compete.