his question was pretty clear in the beginning people just been giving him stupid respones, my opinion is that it depends on the BOV, some will make the same sound any psi some will make a louder sound based on a higher psi. higher psi usally is a longer pssssst then a louder one. its the BOV, the 8psi is tha max a honda engine can take stock, no more, you have to build up to take more, but if i were you unless you get your bottom end built dont go above 5psi or you will run into trouble.