Porting Calculator V4.2.2 'link'

: Calculates mean piston speed and potential ring flutter RPM to prevent engine failure at high speeds. Engine Tuning

You can lock the relationship between transfer and exhaust ports so that changing one automatically calculates the necessary adjustments for the other. 3. Port CAD and Shape Design Porting Calculator V4.2.2

: Users can either enter raw shape values or use a "drag and drop" method with port cursors to modify the port geometry visually. Tuning Philosophy: Look vs. Function : Calculates mean piston speed and potential ring