Unless you have additional airflow mods done to your intake, intercooler and exhaust, the stock boost control system, ie. these pills in the actuator lines work very well, and they are very cheap - although my mechanic didn't like this

Installing a manual but adjustable boost controller doesn't really provide that much, unless you are also planning to simplify the boost controller lines, i.e. disconnecting the solenoids that control those actuators.

I recently bought a set of new pills from a member on the forum here for $20 bucks ($50 from Ray @ Malloy Mazda) and my BNR's are holding pretty solid at 10 to 11 lbs. I have a stock ecu (pfc soon), stock intake and intercooler, ss dp, stock cat, and rb catback.

Looking at your mods, with just a dp and mp, but stock catback, I would try using the stock pills first and see how well you do with that setup. Then if you see boost spiking/creeping above 11/12 lbs, then map out a good boost controller setup.

For my setup, once I add the pfc, do the cheap bastard intake mod, add a blitz smic, aluminum intake piping, add hi-flow bonez cat, put in methanol injection ... then I will need a very solid electronic boost controller setup to keep things at 10 .. maybe 12 lbs.

here are some links to top notch boost controller threads:

https://www.rx7club.com/showpost.php...6&postcount=10

https://www.rx7club.com/showthread.p...+boost+control

Don't get overwhelmed, it's not that hard, just keep reading the info and when you think you have a setup figured out, keep reading

 

the trust airinx is an intake, it's the greddy one sold on rx7.com
and i'm going catless and straight pipe once i get a boost controller and pfc, i also plan on getting a cheapo ebay smic, heat shield for the intake (it needs one), and a new rad, i forgot to mention i also have the 99 spec turbos, didn't know about those until just today, previous owner had MZM international in texas put them on.

 

with straight pipe you will probably need more than a boost controller unless you want to run 15psi, i ported my wastegate and i still creep up to 13 psi, i have the fuel for it so it isnt a problem, but i still creep up to 13 psi

 

i'm purchasing it all and then i'm gonna put it on after I get it, I've been through this in a separate post. hopefully I'll get it all by the end of the winter so i'll be ready for the next season.

 

ok so I make the time to start messing with the car and I have what looks like the jets in the 2 vacuum line and I am still only boosting now .38bar according to the telltale reading on the PFC, here are the mods I have again
PFC
cheap *** intakes
dp
high flow cat
stk catback
and that is it, replaced all my vacuum lines under the uim and chked all other connections, could a solenoid be bad, i remember chkin those to for flow in one direction, maybe I missed one???

 

Ok so those of you who have chimed in and gave me some steps to take and paths to go, here is an update,
PFC
DP
crappy aftermarket intakes
high flow cat
stk catback
stk ic

and i verified that I have 160 jets in the 2 vacuum line to the boost and pre wastegates.....now im boosting only .38 barappx 5 lbs......whats next

 

What are '160 jets'? Holley jet sizes and the stock pill sizes are below.

Pedantic but I wish people would stop using bar as a pressure measurement. The PFC displays boost in kg/cm2 not bars (or, more pedantically, kgf/cm2). I don't think I have seen any automotive instrument using bars in the past several decades.

 

have you checked the intercooler pipes for splits? the couplers and the 90 bend (N3A1-13-245) (lower intercooler intake) are known to do this. I just recently fixed my boost (4 to 5 lbs) by replacing the lower elbow.

 

Im not trying to be a jerk but they are jets in the lines and they say 160 and I did not specify them to be holley jets, I have no idea what make the jets are, and for whatever reason I was taught to translate psi and bar not kgf/cm2, which is i think the same if not close enough to bar, and automotive companies use bar all the time, everyday I plug a $40k computer into a mercedes to diagnose a problem and have actual values figures for hydraulic suspension and brakes as well as pneumatic devices that read bar from the factory........if we can move along with criticism and back to my question at hand,

 

and thanks for the info about the ic pipes, dinosaur, I have inspected them on the vehicle but not well enough, Ima make some time tomorrow or sat morning and get into it, any other suggestions will be much appreciated

 

Have you tried setting the boost on your pfc?

 

yea i believe it set at .75 all the way around... and the duty cycle for wastegate are at 90%, its frustrating cuz the last time I drove it, there was a small boost leak sound nothing like boost leaks I have before aka a bov blows off or a vacuum line,

 

try setting the duty cycle to 80%, the boost level should go up, tweak the duty cycle to get the desired boost level, iirc.

 

ima try that too, has any of you guys personally replaced the mess of vacuum lines ???