No need to be a jackass Tony. I merely disagreed with you and stated my opinions and tried to help the OP.
"Adding lift beyond that point is a calculation of the increased ramp rate to get the valve to peak flow as fast as possible for as long as possible but has relatively limited advantage."
The fact that you use 'ramp rate' tells me you are in over your head. Are you familiar with valve lift LVAJ diagrams and different ramp designs? And the specifics of the L valvetrain in regards to its limitations on the different curves?
The only time I would limit lift off a flow bench test is if the port got very unstable and turbulent. This is a much better indication of how the port will handle high lifts.
I know what you are saying - added lift has diminishing returns - and this is true. But not at 12mm based of flow bench flat-line. That comes around 14-15mm with these motors. Like I said, at ~12mm lift the valve curtain area is still the choke on a 44mm valve.
Good for you.
Thanks. Starting a cam company from scratch (including building and designing the CNC cam grinder) is not an easy task, one that I am still working on. I doubt it is ever going to be very profitable, I just want to offer modern CNC ground cams for old motors. Profile design has come a long way in the last 10-15 years and most cam companies are too busy spitting out LS cams to warrant development on older more unique stuff.
Edited by WhitleyTune, 09 January 2017 - 06:49 PM.