What cam to use in a 318

Not knocking DV but he's just one of many engine builders out there none of them agree 100% or know a 100% of anything and anyone can have patents, it's not a good argument for or against anything.

But the talk of his patent got me interested what they were, these are what I found.



Patents by Inventor David Vizard
David Vizard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

• Internal combustion engine​

  Patent number: 6615795
  Abstract: The present invention seeks to provide further methods to generate swirl and reduce cross flow in spark ignition internal combustion engines having two inlet and two exhaust valves per cylinder head, without the use of additional moving parts.
  Type: Grant
  Filed: March 1, 2002
  Date of Patent: September 9, 2003
  Inventors: David James Martin, David Vizard

• Internal combustion engine​

  Publication number: 20020185105
  Abstract: The present invention seeks to provide, inter alia, further methods to generate swirl and reduce cross flow in spark ignition internal combustion engines having two inlet and two exhaust valves per cylinder head, without the use of additional moving parts.
  Type: Application
  Filed: March 1, 2002
  Publication date: December 12, 2002
  Inventors: David James Martin, David Vizard

• Exhaust mufflers for internal combustion engines​

  Patent number: 4577724
  Abstract: An exhaust muffler comprises a closed chamber, an inlet pipe leading into the chamber, an outlet pipe leading from the chamber, two spaced bulkheads dividing the chamber into first and second buffer compartments separated by an intermediate compartment containing a glass fibre pack, three pass tubes extending through the bulkheads and across the intermediate compartment, two of the pass tubes forming continuations of the inlet and outlet pipes respectively and having flared open ends in the buffer compartments respectively, and a parabolic noise reflector located opposite the open end of said two pass tubes in such manner as to reflect down the pass tubes a proportion of the noise generated by gases flowing along the pass tubes.
  Type: Grant
  Filed: June 18, 1984
  Date of Patent: March 25, 1986
  Assignee: Shelburne Incorporated
  Inventor: David Vizard

• Exhaust mufflers for internal combustion engines​

  Patent number: 4467887
  Abstract: An exhaust muffler comprises a closed chamber, an inlet pipe leading into the chamber, an outlet pipe leading from the chamber, two spaced bulkheads dividing the chamber into first and second buffer compartments separated by an intermediate compartment containing a glass fiber pack, three pass tubes extending through the bulkheads and across the intermediate compartment, two of the pass tubes forming continuations of the inlet and outlet pipes respectively and having flared open ends in the buffer compartments respectively, and a parabolic noise reflector located opposite the open end of said two pass tubes in such manner as to reflect down the pass tubes a proportion of the noise generated by gases flowing along the pass tubes.
  Type: Grant
  Filed: November 30, 1981
  Date of Patent: August 28, 1984
  Assignee: Shelburne Incorporated
  Inventor: David Vizard