First this exhaust sound good...unlike the ricey fart sound. Not obnoxious!

Anyway quick glance at the boost gauge and she is getting about 12.5 psi from WOT in 3rd...got off immediately and take easy on way home. My mods are KHS DP, Apexi intakes, Greddy SMIC, and of course the 3" RB DT catback. Prior to catback with above mod car was right at 10.5 psi.

I do have an Apexi PFC on hand ready to go so should I install a boost controller or just go with the PFC and 12+ psi as is?

Money already spent on the PFC...taking the car to Steve Kan.

Dyno session coming up...initial base dyno was 215 rwhp with bad plugs in stock form.

 

I would go with the boost controller and tune it to 10psi max boost. From what I've read, the PFC is kinda hit or miss with controlling boost. When you get the car tuned, then have Steve crank it up!

 

see I already bought the PFC...so if installing it give more hp at a safe level then I'll go ahead have it installed if not I might just go with a modified stock ECU like the Pettit unit and a boost controller.

Or maybe just a fuel pump with stock ECU at 12 psi...

 

I would unplug the electrical connectors from the wastegate and pc solenoids and take my time looking for a boost controller.

I don't have any experience to know if this kind of boost change is beyond what the PFC can handle (it very well may - it's not like you're running 15psi with a midpipe).

Dave

 

Are those the two right underneath the black pressure tank by the throttle body?

 

Get yourself a greedy profec b spec II. I have one and I love it. You can even set a warning peak boosk to insure that you don't overboost on a cold day or durng a new component test (like what happened today).

 

When you take it for the tune, ask Steve Kan. He will tell you if you need a boost controller with the PFC. He is "The Expert"

 

I'm surprised by the advice given in this thread so far....

Just install the PFC and use it to lower the boost to 10 psi until you can get it tuned. No need to unplug any solenoids or anything. I WOULD get a separate boost controller installed before the actual tuning session to get more consistent and easier to change boost.

 

From what you are saying...no need for boost controller if I have the PFC installed and tuned in one shot...correct?

I want to run 12 psi with reliability...properly tuned of course.

 

he's saying just use the PFC now since you have it and set the boost at 10. step 2 buy a seperate boost controller and then at this time take it to steve kan and let him go to town.

this is because the PFC boost controller is not reliable in some situations. the Greddy profec b specII is a very popular and reliable unit.

 

If you really want to be safe, install a boost controller and set it to 10psi while leaving the stock ecu in place. The stock ecu has been proven for all kinds of mods as long as you are running stock boost levels. You will still feel a performance increase buy doing this until you get the car to Steve for the PFC tune. Personally I wouldn't fool with any kind of base map on any aftermarket ecu because the stock will always work better. You gonna need one anyways as some people suggested for better boost control. You could easily make the Home Depot Boost contoller for less than 10 bucks and is woks perfect. I've had mine installed in my car for over 2 years ever since I put modified my stock intake and put on my down pipe and was getting boost spikes.

 

I agree. The PFC will allow you to dial in duty cycles and keep boost levels at a stock setting. Install the PFC find an open and unpopulated road and monitor your boost levels and responses.

To add the PFC (from my own experience) will require adjustments depending on weather conditions. It is less likely that you will need to make these regular changes with a boost controller.

 

I can made a manual boost controller...but I really want to run 12 psi not 10 psi...so in order to accomplish 12 psi w/o blowing up the motor I need to have the PFC installed and tuned. And maybe a fuel pump...

Correct?

TIA