I was wondering how accurate the PFC is when displaying boost. I made a 1-2 gear run and the PFC peak hold read .74mmhg. If I figured it correctly thats almost 11 psi. But I have my boost controller (Profec B Spec II) turned off with the HKS standard wastegate and 10# wastegate spring. I figured with boost controller off I shouldn't of gone past 10psi. Unless I miscalculated, correct me if I'm wrong. Thanks.

 

Very old story, the PFC does not show correct pressure. It normally shows lower.

See attachment.

When true boost is 15PSI, the PFC shows .97 KgCcm^2 which is 13.8PSI.

 

Thanks Chuck, so were my calculations right .74mmhg from the PFC commander equals about 11 psi? And going by the data you provided I was actually running higher boost then the PFC displayed. So with boost controller off and running boost strickly off the wastegate spring (10#). How did I overshoot on boost? I kinda worried now, I'm thinking theres something wrong. Thanks again Chuck.