Helical camshaft

A helical camshaft is a type of mechanical variable valve actuation (VVA) system.

References

U.S. Patent 6,832,586
"Two Wheels" magazine, July 2008, pages 74–75. Story: "Timing with a Twist-The Williams Helical Cam" https://web.archive.org/web/20081220005104/http://www.twowheels.com.au/ Author: Jeremy Bowdler
"Performance Buildups" magazine, Volume 15 No.1, pages 30–35. Story: "The Helical Cam - A New Twist on Induction" Author: Paul Tuzson
"Fast Fours" magazine, July 2004, pages 100–108. Story: "Totally Twisted" Author: Paul Tuzson http://www.fastfours.com.au

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