So my buddies RL is only boosting 5psi. It is stage 3 with 60lb injectors and a 2.8 pully. He says his supercharger sometimes lags when shifting or when shifting the car will fall on its face... every now and then he will push full boost. He thinks he needs to clean his throttle body. I honestly dont know.. im not a SC guy.. input??

 

Bypass valve on the supercharger is probably shot

 

As blue said. I'd also be sure the belt isn't slipping

 

check the bypass valve and make sure none of the vacuum lines are cracked/broken. any codes with it??

 

Where can he purchase a by pass system. . Dont see one on zzps site or CED