Can you boost an engine with compressed air like you do a turbo ex like an air tank with a hose to release in the stock intake box also would a pressure regulator be ideal to limit the PSI?

Yes, you can use compressed air to boost an engine, similar to a turbocharger, by connecting an air tank to the intake system; this is known as "air injection." However, it is crucial to control the air pressure to avoid damaging the engine, making a pressure regulator essential to limit the PSI and ensure safe operation. Keep in mind that this approach is not as efficient or effective as a traditional turbocharger, which recaptures exhaust gases to increase intake air density.