Single or Dual Pattern Cam
Here’s a David Vizard method of selecting LSA: Engine C.I./8/Intake valve diameter = X
Example:
318/8 = 39.75
39.75/1.92 = 20.70
20.70 on the graph shows: 109 LSA
In his books he recommends rounding up if it falls somewhere in between The more common even numbered LSA’s
Change around with cubic inches and intake valve diameters can you can see the various LSA’s It comes up with. Obviously there’s more to it, but if you read some of his books and his theories on camshaft selection it all makes sense
Here’s a David Vizard method of selecting LSA: Engine C.I./8/Intake valve diameter = X
Example:
318/8 = 39.75
39.75/1.92 = 20.70
20.70 on the graph shows: 109 LSA
In his books he recommends rounding up if it falls somewhere in between The more common even numbered LSA’s
Change around with cubic inches and intake valve diameters can you can see the various LSA’s It comes up with. Obviously there’s more to it, but if you read some of his books and his theories on camshaft selection it all makes sense