Re: 3/4 cam, was,,,,,,, Muscle Cars (Forever®) stamps

In the early 1950's the most popular original camshaft designers were the legendary Ed Winfield, the father of hotrodding, and Cliff Collins of Harman-Collins. If you look a Huntington's 1951 book you will find the specs for their cams listed. We've also listed some of their cams on our Flathead Performance Cams page. There were lots of cam grinders that copied Winfield and Harman-Collins cams, but these two were the designers and innovators in the early days. It was popular to refer to cams as a 1/2 Race or Semi grind and a Full Race grind. Later, there was a call for an intermediate grind between these two. To fill this demand, Ed Winfield took the intake lobe from his full race cam and the exhaust lobe from his semi cam and called it a 3/4 Race cam (see Flathead Performance Cams). It was literally half way between a full race and 1/2 race cam. Since that time, 3/4 Race has become a generic term for a high performance street cam, i.e. something less than a race cam.

Sent from John

On Feb 21, 2013, at 11:59, Dodger7998@xxxxxxx wrote:

Good one Nick, but think about what you said,,,, that would mean a full race would be 360 degrees or completely round,,,,,somehow I have my doubts that a full race would even start let alone race,,,,,

In a message dated 2/21/2013 1:35:05 P.M. Central Standard Time, furyus63@xxxxxxxxxxx writes:

I remember the term coming from old Ford Flat Head drivers. It meant the cam had 270+ degrees of duration. It was meant to be 3/4 ths of 360 degrees. Low Tech cam technology. "That's my story and I'm sticken to it", unless I'm found to be wrong of course.

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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!

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