Sky Dynamics High Ratio Rocker Arms

[krwalsh]

Is anyone using Sky Dynamics High Ratio Rocker Arms on their parallel valve O-360?

http://www.skydynamics.com/HLDRRA.htm

It looks like an easy way to get another 5% out of the engine, but I wonder about valve guide wear.

 

[RV8R999]

RPM during test

Doesn't look like much of a gain at all at the 2700rpm limit. Their 2nd plot was taken at an RPM of 2821.

 

[Jerry Cochran]

Cam?

Will the camshaft take the extra stress?