I have the standard On3 70mm journal bearing kit. The WG has the spring in it that came from On3, I believe it's a 6psi spring. I have a Hallman MBC and I can crank it all the way and not see an increase in boost. It IS hooked up correctly. It makes 7 psi and holds it untill close to 6k rpm's where it creeps to 11 in third and fourth gear. The motor has a TFS top end kit, Systemax intake and open down pipe. Just wondering if anyone has had similar experience with the MBC not adding boost.