I have been having this problem with low secondary boost that bounces around 10-8 psi.

Normal pattern 12 on primary, drop to 8 at transition and then 10-8-10-8. Checked everything. Finally, changed the duty cycle for primary to 90% and secondary to 95%.

Boost is back to 13 psi. Still some flutter but the PFC appears to be getting better and better at removing this flutter.

Mods:

New Malloy Reman
New-Used Twins
M2 Large, PFS DP, Bonez Hi-Flow Cat, PFS exhaust, RE Airbox.

 

I have the same problem with mine. How did you change this? As soon as I pass 4500 rpm's my boost drops to 8 psi and then goes back up to 10 and then bounces between the two all the way to red line.

What did you do to fix it?

thanks,
-josh

 

With PFC Commander go to "Settings"

Goto Boost, change the percent duty ratio for boost #1 or boost #2.

I recommend 90% on the primary and then 92% on the secondary.

Same thing with Datalogit.