CNC engineered gas flowed cylinder heads

Volkswagen G60 8v (Big Valve)

We looked at the G60 head and reckoned higher boost is best served by a bigger valves (as any engine would of course, but particularly so in this case.) So, to really take this head to the maximum possible, we developed a big valve version of our G60 head.This head shows a mighty 45.6% increase in inlet flow and 31.3% increase in exhaust flow. By any measure these are substantial increases which, of course will be multiplied by whatever boost you happen to be running.

We have measured our G60 head as if it were a normally aspirated engine. This is because supercharger boost cannot be easily simulated and has many variables such as barometric pressure, ambient temprature, intercooler effiiciency and level of boost used. We are working on a model for turbocharging and supercharging engines but for the moment we only have figures the head as if it were normally aspirated. This at least gives a fair benchmark of the improvements made.

  

 

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We looked at the G60 head and reckoned higher boost is best served by a bigger valves (as any engine would of course, but particularly so in this case.) So, to really take this head to the maximum possible, we developed a big valve version of our G60 head.This head shows a mighty 45.6% increase in inlet flow and 31.3% increase in exhaust flow. By any measure these are substantial increases which, of course will be multiplied by whatever boost you happen to be running.

We have measured our G60 head as if it were a normally aspirated engine. This is because supercharger boost cannot be easily simulated and has many variables such as barometric pressure, ambient temprature, intercooler effiiciency and level of boost used. We are working on a model for turbocharging and supercharging engines but for the moment we only have figures the head as if it were normally aspirated. This at least gives a fair benchmark of the improvements made.

Note : flow diagrams show flow against specific valve openings at 0.050 inch valve openings at 10″ 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.

 

Cost for this head is £1200.00 + vat on an exchange basis. (£350 exchange). 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. Please note : Valves are supplied at extra cost on this head.

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.