FDrifting7

Im running a single turbo setup... i have the selenoid and 3 bar map sensor hooked up, and i switched my pim settings to option 1 on the PFC.

1) I need to plug the stock map sensor in the powerfc ecu port correct? with a vacuum line hooked up to it.

2) what ports are u supposed to use on the selenoid? i got the COM and NC port being used now, with the NO port plugged... but i just guessed by looking at the japanese directions so i dont know if im right.

3) how do i get the powerfc to reconize the boost controller? and where do i control boost in the commander?

any information you could help me out with would be awesome. Thank you

arghx

iTrader: (3)

You are using the actual kit? I've never messed with the actual kit, I just used a GM MAP sensor and modified the stock wastegate solenoid for single turbo use. I believe you are supposed to plug the Apex'i MAP sensor into the side but keep the stock one hooked up.

do NOT plug that port! that's a quick way to blow a motor. the NO port vents pressure out of top chamber of the external wastegate as the solenoid cycles on and off. If it's plugged, your wastegate will not open. Otherwise, you can put COM to the wastegate top port and NC to the pressure source. The side port of the wastegate should also see boost. Where you take the pressure from for the top and side ports can have some effect on the duty cycles required:



The chart explains how different pressure sources change the amount of boost achieved with a particular duty cycle setting (it's the same on any EBC really). Use the "lower" or "lowest" boost setup if you are concerned about overboosting, and the "higher" or "highest" boost settings are normally used for setups that want to run a lot higher pressure than the wastegate spring.

You're supposed to turn off sequential boost control, and I'm guessing that having the MAP sensor plugged into the side tells the PFC that the boost control kit is installed.

Boost is controlled by the boost menu on the Commander. There are two main boost settings (low and high) and a couple adjustments for each. There is a target boost setting in kg/cm^2 and a base solenoid duty setting, one for the primary turbo (precontrol) and one for the secondary turbo (wastegate). On single turbo cars those two settings should be set the same.

Tuning it is a bit weird. I usually set the target boost levels maybe .05 kg/cm^2 higher than my spring pressure. Then I ramp up the duty cycle slowly and check peak boost on the Commander. From what I have seen, on externally wastegated single turbo setups the achieved boost level will be higher than the target.

Let me see if this clarifies a little: So right now I have a 13psi spring (.92 kg/cm^2 or so) on a T04R.

One of my boost settings is

Pr 1.00 [kg/cm^2] 50 [duty]
Sc 1.00 [kg/cm^2] 50 [duty]

I usually get about 1.14 (16.2 psi) +/- .03 kg/cm^2 depending on weather (1st gear also boosts less). Overboost fuel cut will be around 17.5 psi (target boost + around .23 kg/cm^2). Raising the duty a little bit will make finer adjustments to the boost level. Raising the target boost level will also make some adjustments to the boost... I am oversimplifying it here. If you have a Datalogit you can log the boost control behavior and it will become a lot more clear.

The best rule of thumb I can give you is to set the target boost right near your spring pressure. Start with maybe 40% duty and do a pull in 2nd or 3rd. raise or lower the duty in 4% increments, checking peak boost each time with the PFC peak/hold function (make sure you clear peak values). You can also adjust the target boost up and down slightly to see what it does. All this sounds complicated but actually it's really not that hard to get it set up decently.

What is your wastegate spring pressure and what boost level are you trying to run?

FDrifting7

First off, thanks for all your info

I honestly dont know what the spring pressure is.. but its a tial 44mm, so maybe you know.

I am wanting to run up to 18lbs...

I just got the car running for the first time with a single turbo setup, and i am planning on taking it to someone to get it tuned... so hopefully they can get the boost pressure and everything setup with the powerfc.

I just want to make sure im getting everything hooked up correctly, so they can.

now on the solenoid... do i need to be using all 3 ports?

because this is the way i have it setup...

the NC port on the solenoid is routed to the bottom nipple of my wastegate, and is T'd in with a nipple that is coming off the compressor housing.

and i have the COM port routed straight to the top nipple of the wastegate.

and the NO port plugged.

I know have this completely wrong... but thats why im askin! but by looking at your model it seems i have to have both lines tied into a vaccuum source.

Can you please tell me how i should route each port?

and i read somewere on the forums, that you plug the stock map sensor in the ecu, and the 3 bar map sensor where the stock one was. so thats how i got setup for now.

thanks again for your help.

arghx

iTrader: (3)

that MAP sensor setup, well give that a shot. I don't have any firsthand experience, but what you said about hooking the 3 bar into the stock plug makes sense to me.



here is a crude drawing that will help. You can source your pressure from the compressor outlet (instead of post intercooler) but the boost controller will probably require lower duty cycle settings. The NO port should be open vented, or if you really care about noise you can route it back to the intake pre turbo.

On my own car I have a completely separate line to the side port done in stainless steel. If the side port does not receive pressure for whatever reason (melted or blown off line) your wastegate will not open and you're in big trouble.

FDrifting7

thanks for drawing up that diagram... makes things easy.

i like the idea of stainless vac line... cause they do run close to my downpipe. Did you get special fittings for the wastegate and solenoid to run stainless?

now that i have everything setup correctly. I just need to figure out how to let the power fc reconize its there...

I've heard your supposed to be able to have 4 different boost settings... but when i go to "boost" in the settings menu, I only have 2.. and each one has a Primary and Secondary setting.

I went through the menu and found what i think is the sequintial turbo on and off button... so i changed that and nothing different happend.

It would help out alot if someone had the powerFC manual in english!

arghx

iTrader: (3)

The Tial wastegates come with metric banjo bolts, maybe M10x1.0 thread? The sizes are in the technical drawings on the Tial website. Banjo fittings are very easy to rotate, which is probably why they were used. To use actual AN fittings you would have to buy a couple adapters and a tee meant for AN fittings. That's what I did on an old setup. For my current setup I did it the more ghetto way. I just took AN line (4AN or 6AN would work) and pushed it on to the barb fittings, then used a small hose clamp. It's not pretty but it's not going to fail on you. You could retain the banjos on the wastegate and use all 6AN line and 1/4" barb brass fittings when needed.

If you had a Datalogit it would be easy. You can log the boost controller duty cycle to see what it's doing. Another method is to take it out with the boost control solenoid unplugged, and note the peak boost using the Commander. Then plug the solenoid in and see if it changes. BUT you don't know your spring pressure and the car is not tuned. That's pretty risky. On PFC models for other cars, there is a "boost control kit" function under the function select menu, but that is not the case for the FD.

On other cars (Skyline etc) there are four boost settings. Because there are two boost control solenoids on a stock FD, you have two different boost settings with separate adjustments for the precontrol (Primary setting) and wastegate (secondary setting). On a single turbo, the Primary and Secondary settings should be the same.

I can tell you this: on a FD PFC without the boost control kit installed, turning off "sequential turbo control" will make the boost controller output (wastegate solenoid pin on the PFC) stop working. It will fix the solenoid at 95% duty which will stick your wastegate shut. Perhaps installing that plug into the side makes it work?

I don't have the kit. What I did on my single turbo setup was use the Datalogit to trick the PFC into thinking I had sequential twins hooked up and that my secondary turbo came online at 2000 rpm. It controlled boost fine after that, once I figured out how to tune it.

Unfortunately, the PFC manual does not cover the boost control setup in a useful way. Its instructions are both sparse and misleading, and as a result a lot of people threw in the towel on getting it to run right (and I don't blame them). I only figured it all out (it's pretty simple actually) by doing some datalogging and by reading the AVC-R manual.

FDrifting7

I actually just got an avcr...

It seems much more simple just to have a standalone boost controller. Easy to change different setting's, and it self learn's. Plus scramble boost could be fun.

The avcr manual is really good too.

But I do still have my 3 bar map sensor, and factory map plugged into the ECU.

Should I set the boost really high on the powerFC, so i dont hit fuel cut?

arghx

iTrader: (3)

^People turn off the fuel cut because they have this idea that "cutting fuel" and stopping combustion completely is as bad as boosting with a lean mixture. Overboost is a lot worse for your engine than fuel cut. https://www.rx7club.com/3rd-generation-specific-1993-2002-16/who-has-blown-their-motor-direct-result-overboost-fuel-cut-860385/

If you want a standalone controller with the easiest learning curve you should've gotten a Greddy Profec S. You'll see what I mean.