Well I think the life expectancy of the blower will be alot lower as it will cavitate hard when your not using all that air pressure like at idle, or regular cruise speeds.
But because its a positive displacement blower in theory it CANT Cavitate as it will just keep inefficiantly pushing the air thats already in the intake already
I would not recommend it. I did it as an experiment, and my solid coupler was deformed after an inspection of 3000 miles. It was triangular in shape instead of a circle.