Board index Flathead Power-Technical Questions, Answers, and Suggestions 45 Flatties History of Relieved

History of Relieved

Post Fri Nov 12, 1999 3:52 pm

Posts: 582
Location: meridian, id. usa
Sifton was a harley dealer back when so he had access to raw material

Post Fri Nov 12, 1999 6:47 pm
don User avatar

Posts: 575
Location: Spokane WA USA
I do know of a story told by flattrack riders
of their then boss, Leonard Andres, who would
smoke flow, with clear heads the K model, then tune by porting and relieving.

Post Fri Nov 12, 1999 7:39 pm
don User avatar

Posts: 575
Location: Spokane WA USA
I think the designers and engineers working for various manufacturers came up with this first, but only to achieve general all round runability. "the factory standard"
then others, including some of these engineers carried porting and relieving to the specific needs of the particular engine.

[This message has been edited by don (edited 12 November 1999).]

Post Sat Nov 13, 1999 8:17 am

Posts: 233
Location: Ridgefield,Ct 06877
I'm sure guys were porting and releaving Model T Fords in the 1920's and before. The earliest dated referance I have is June 1933. This is on a blueprint from the George Riley Co. who manufactured the Riley overhead conversions for Ford Model A's and B's

Return to 45 Flatties