Power FC Boost pressure on PFC..?
04-01-05, 11:21 PM
#1
Big Snail
Thread Starter
Boost pressure on PFC..?
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.
04-02-05, 08:31 AM
#2
Eye In The Sky
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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.
See attachment.
When true boost is 15PSI, the PFC shows .97 KgCcm^2 which is 13.8PSI.
Last edited by cewrx7r1; 04-02-05 at 08:35 AM.
04-02-05, 11:45 AM
#3
Big Snail
Thread Starter
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.
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