Here's what I'd do. Leave the stock pills in the lines and set the boost levels on the PFC to 13-14 psi. You can play with the duty cycle values a bit if you even need to. That should give you roughly 350 rwhp.

If you decide you want to modify the pills let me know and I will look at how I have modified mine (size/jetting) in the past for the BNR's, albeit higher boost levels.

Feel free to PM me or ask any questions you may have.

 

Good thread. I'm running a very similar setup (seq, using PFC as boost controller) and I've been trying to figure out these pills for a while now. One important thing to note which seems to get overlooked is that '99 spec turbos, as I'm running, have the pills built into the nipples coming off of the primary turbo that the actuators connect to. You have to drill them out to remove them.

On my car I'm trying to run 13lbs of boost. On my primary turbo I see 13lbs rock solid. The secondary is the issue. Boost oscillates between about 10 and 13lbs. I have not drilled out the pills on my turbos yet. My theory is that since the WG pill is designed for 10lbs it's allowing pressure to build up at the actuator too slowly causing the PFC to over compensate and adjust the WG solenoid to too high a boost level. Once pressure at the WG actuator finally catches up, the boost goes too high and the PFC reverses direction, adjusting the solenoid to reduce boost level. This causes pressure at the actuator to bleed off, but again too slowly because of the restrictive pill. Therefore the secondary boost pressure keeps oscillating up and down as it's stuck in this laggy race. One thing I need to test is lowering the duty cycle on the secondary in the PFC boost settings. This might cause the PFC to react more slowly reducing the oscillation.

I'm not sure exactly why the primary boost is rock solid given the issue with the secondary. Maybe because the hole in the pill for the TC actuator is larger and happens to be big enough to prevent the oscillation.

In any case, adjusting around the pills sounds like a bandaid solution. The pills are designed for a stock car and trying to make them work with a modified car running higher boost is going to be a hack no matter what. I'm all for arghx's solution. Makes the most sense to me since it retains proper control of both the WG and the TC solenoids. I'll probably drill the pills out and then try to get things working with the stock WG and TC solenoids. If they're too decrepit I'll upgrade them as per arghx's instructions.

Another topic that always seems to add confusion, the PFC boost control kit is not necessarily needed to control seq turbo boost. The base PFC has the ability to do this. The boost control kit is like a semi arghx solution. It just upgrades the WG solenoid to a higher quality unit (rather than upgrading both). This makes sense because it's designed for single turbos where you don't use the TC solenoid anymore.

 

I modified the pills on my brothers car to get quicker boost response but the PFC had no problem controlling the boost. He runs sequential BNR's and makes 433 rwhp @ 18 psi, 460 rwhp @ 20 psi, and 474 rwhp at 21. We haven't tried higher boost because we are running out of injector.

He also runs the 3 bar GM boost sensor from Banzai.