Just wondering if the rpm at which float happens on the dyno would be the same under various loaded conditions in the car

Missing the simple part here.... if it floats on the dyno there is a problem that needs fixed before it even hits the car.

If it floats on the dyno its time to look cross eyed really hard at your engine builder.


For what 99.9% of us here do, spec and check the right parts and valve float will never happen.