Ok, I know im bringing this back from the dead, but I am stumped with my Hallman MBC-- I know I have everything hooked up right, im running the lighter spring with the ceramic ball and when the MBC is all the way loose, my car is spiking 25+ psi. I know I have all the lines run correctly and nothing is leaking, I went back under the car, tore everything out, replaced it all with 1/4" fuel/vac line, made sure there were no leaks-- put it all back together. Still the same problem.
And yes I checked the inlet/outlet ports a dozen times to make sure they are right.
This totally sucks because the Hallman Pro RX is one of the more expensive MBCs out there that I bought specifically to control spiking issues.
Me sad.
I will probably go in to work early tomorrow and swap in a TurboXS MBC to see if it makes a difference. As I do more research it seems like some brand MBCs work with this car and others don't.