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Like the opposite is possible. Match a large turbo to a proportionally small wastegate, and there can be boost creep. This is when the wastegate opens, but the engine still produces more air than the wastegate can reject, so as rpms rise, exhaust gases eventually spin the turbine faster.
Similarly, someone could remove/leave the wastegate open. With a wide open wastegate bleeding off only a fraction of the exhaust, the exhaust could eventually generate enough flow to spin the turbine and boost could rise. It would likely have a low boost ceiling. I don't know anyone who does this. I also don't know the efficiency of said setup.
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