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-   -   Cam shaft selection - very informative video (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1074183-cam-shaft-selection-very-informative-video.html)

Harpo 09-26-2020 03:06 PM
Cam shaft selection - very informative video
 
I just found this very informative video on how to choose a cam shaft

https://www.youtube.com/watch?v=JPAeepqrY-0

Harpo 09-26-2020 03:28 PM
He claims that if he knows how well heads flow at 28 inches of liquid (mercury?) he can predict HP. Are the flow # published for our heads?

Thanks

David

MST0118 09-26-2020 04:32 PM
Just watched the video and think he explains lift, duration, LSA well among other things. I thought there were some flow data threads on this site for certain stock heads but I don’t recall seeing anything published.

Harpo 09-27-2020 03:20 AM
I have always regarded cam shaft selection as witch craft but he breaks it down very nicely and explains in plain English so even I can understand

Rosco_NZ 11-01-2020 01:29 AM
36mm ports in 2.7RS heads flow about 225cfm, ~248hp.

TimT 11-01-2020 02:41 PM
http://forums.pelicanparts.com/911-engine-rebuilding-forum/155158-911-head-flows-4.html


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