Rotrex help needed

[Ash27]

hey guys hoping someone might be able to figure this out I’m completely stumped I have my dc5 in for mapping rotrex c30-94 supercharger for some reason it’s hitting 1 bar 14-15 psi boost at 5500 rpm and stops possible belt slip maybe but would belt slip look like this on the dyno we have checked blow off valve checked for any leaks and come up short it has a kpro ecu 750cc injectors 3” straight pipe

 

[Honda-atr]

Are you sure the blow off valve isn’t causing this? What kind of BOV is this? Is it spring rated or is it a pull type (HKS Super SQV)?
And have you tried without the BOV?