By Bruce Simurda, Dune Buggies and Hot VW's
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| Combustion chambers are contoured on this computer- controlled mill. A head is clamped on, and the mill does the rest. | This second step contours the intake ports, from the chamber-side only. Two heads are completed in one step. | The third operation is the largest, with six heads on the fixture, and profiles the exhaust, and finishes the intakes. |
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| ABOVE, looking through the intake ports of a completed Bug Patch head (right), you can easily see the difference between it and a stock 043 head with 40x35.5mm valves. ABOVE RIGHT, likewise, the completed exhaust port shows a considerable improvement. It should be noted that the finish on these ports are as they come off the machine-no hand finishing has been done. | |
 ABOVE, although not huge ports, the flow chart at right shows that the intake flowed almost 160cfm at .500-inch lift (with Dellorto manifold). |
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