Slightly strange head flow question.

And that deoends on the cam style and even spec 'g stock/stock class lift limited'... how much above the peak you would need to go.

A flat tappet cam only see's that peak flow for a blink, it's the time/flow during the open/close cycle that you see more of.-think under the curve.

Lifting the valve over the peak flow also makes up for lag time of inertia driven intake charge.

roller has more open time at peak lift.

and part of the of idea is 'lag time', that is also closely related to intake/ram tunning...that is where the tail end catches up or inertia from the low pressure signal/pulse and how long/much it translates-Think big flying by you while standing on side of the road and the tail wind/gust that comes after ...

placing the mid ramp where/@ peak/desired flow is how you realize the potential in that area....but if the heads fall off a ton much past that...you need to be concerned with how much time you have the valve held open where it's backing up-also refer to the fact that intake manifolds usually slow the air down/limit total flow which is the same in a way

so thats the idea in my screwy way of stating it...since Im 8 beers into this