Cam choice!

roccodart440 said
They are still using wide LSA's today, 117deg to be exact.

LSA isn't a cookie cutter number that always equates to a lower angle is better. It affects the idle, the power curve and cylinder pressures, and in FI applications a wide LSA is needed for function.

If you believe Vizard's reasoning that is what would be expected as today's high flow 4 valve per cylinder and CFD modeling of intake air flow will drive much higher LSA numbers for optimal engine operation per his charts. One of his examples is a 4 valve 2.2L that calculates out to a LSA of 118 degrees because it can flow so much more air compared to the volume of the cylinder