[Fot] A cam for Rick

Larry Young cartravel at pobox.com
Sun Jan 22 10:30:36 MST 2023


The numbers for Erson/BFE #24 mentioned by David and Henry is the last 
one in my list and has the longest duration. Like Henry said, if you 
drop below 4,000 your dead.

I got interested in the history of cam design. According the Speedy Bill 
Smith (Speedway Motors) the real innovators after WWII were Ed Winfield 
and Collins of Harmon-Collins (see the book "Souping the Stock Engine). 
He said their designs were heavily copied by the others. I think Kas's 
cams were designed by someone from Harmon-Collins.

I certainly don't have the experience of many others on this list, but 
I'll contribute a few comments on what Rick has said. Cams is a subject 
that is mysterious (Rick said "black art") to many, so it is easy for 
them to be fooled. There is nothing mysterious about it. I agree that 
most people put to much emphasis on peak HP rather than the entire range 
you will operate in.
  - Larry


On 1/22/2023 6:46 AM, David Gott via Fot wrote:
> Hi FOT,
>
> I used Larry Young’s site to learn a lot about cams and their relative 
> effects on engine performance with some crude engine modeling 
> software, in the quest to pick the right cam for my wants, building a 
> strong mid range engine, trying not to spin over 6,000 if I can help 
> it with a stock based crank.    Does anyone happen to have the specs 
> on the Gillander’s #24 they could share?  Just curious.  Maybe it’s at 
> the pointy end of the list below?
>
> Rick McCurdy, here’s the cam reference list Larry put together, below, 
> and I’d sure be curious what Rick Parent’s software would say I should 
> have done!!!
>
> Triumph Cams <https://www.tildentechnologies.com/Cams/TriumphCams.html>
>
>
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