lift vs air flow?

[rod]

just because I want to know...
lets say that a ports peak flow is at .500 lift. what happens when the lift goes to .550. is there any reason for that? is there any additional power to be had at the .050" additional lift?
additional thoughts?
thanks Rod in AZ

[HP HUNTER]

Originally Posted by rod

just because I want to know...
lets say that a ports peak flow is at .500 lift. what happens when the lift goes to .550. is there any reason for that? is there any additional power to be had at the .050" additional lift?
additional thoughts?
thanks Rod in AZ

That probably would depend on what the flow curve looks like above .500 lift. Typically you see about 85% actual lift @ the valve due to flex, some may be less.

[cmracing]

As long as the port doesn't stall above .500 lift then by going to .550 lift you will have more area under the curve, IE: more airflow into the cylinder, and due to flex in the valve train, you will probably get the valve lift above .500 as mentioned above.

[SST3193]

20 years ago I home ported a pair of 906 Mopar heads and installed them, along with a .650 Comp Solid. Damn bracket car would pick the darned time to stall, near the finish line and pop out the exhaust.
Installed a much better fuel system and ignition system, eliminating problems from either. Raced the year out and took the heads to a flowbench and found that they stalled almost exactly at .500 lift.
Car seemed to run well until high gear when, of course the thing would go lean.