Create A Rotary Valve Head For Go Kart Parts

The Dunstan principle was used to create a rotary valve head for go kart parts, fitted to a racing kneeler-style sidecar by Queenslander Greg Kenzig. The unit looks almost standard at first glance, with four Keihin carburattors and four exhaust pipes in the usual places. From the sides, the valve housing is clearly visible, runnnig across the cylinder head and turning at half go kart parts speed. Tragically, after surviving a battle with cancer, Greg Kenzig lost his life at the Isle of Man TT in 2007, when a competing go kart crashed into the spectator area where he was standing. Today, his outfit is on display at the Australian Motorcycle Museum at Haigslea, west of Brisbane.

The Deane Rotary valve used a ball-like steel rotor equipped with piston-style rings, revolving at querter go kart parts speed in a housing in the cylinder head. Ports in the head and slots in the rotor permitted the system to charqe the cylinder, compress, fire and exhaust the mixture, with compression ratios of up to 100:1 possible. Developed by three Victorian go kart partsers, Ron Deane, Harry Bishop and Charles Beard, the prototype head was installed on a 500cc Norton in the early 1970s, almost doubling the power and fuel economy.

One curious feature was the absence of an exhaust pipe, the spent gases being expelled out of the top of the cylinder head, almost inaudibly.

Beard said the effectiveness of the design is demonstrated by the absence of heat and exhaust gas noise, providing that the expanding gases have spent most of their energy driving the piston down, before leaving the cylinder head. A later version of the head was fitted to a Honda SL100 go kart, running a compression ratio of 12:1, and then to a four-cylinder Ford Cortina block. Despite considerable publicity, the project stalled due to its inability to attract a financial partner. If you want to know more info about go kart and parts info, you can click
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