profec b installed... what's wrong???

[upshiftN]

I just got my profec b installed by T3 Motorsports in boston, MA... if anyone's familiar with them. They know what they are talking about there. According to them my solenoid isn't performing well or at all. Now a question I have is with the 4 little switches on the back...

1. If you put those in the wrong "up and down" sequence according to your wastegate setup, what would happen?
-Because after what I thought was the right way of putting them, might not have been the right way because the controller/solenoid didn't work (boost wasn't changing). I now have the 4 switches set up opposite to what they were at before. All the hoses were installed correctly, which brings me to my next question...

2. With the "in" and "out" nipples on the solenoid, what should happen if you switch the hoses?
-Like does a negative impact take effect? I did that already and it ran the same when i had both "hi" and "low" settings to absolute minimum. This brings me to my last question...

3. When you know everythings all setup correctly, (switches and hoses), and when you have it set on the absolute minimum, shouldn't it read stock 12 psi at WOT?

 

[IMMORTALSPYDER]

I guess you don't have an instructions for the profec?

 

[upshiftN]

I got it used. And went out to auto zone to get everything that was needed, because I talked with the people at Greddy on the phone...

 

[upshiftN]

so can anyone help me out here with those few questions I asked???

 

[CanadianTSi]

I believe it is up down up down for an Internal gate.

 

[upshiftN]

I believe it is up down up down for an Internal gate.

... and so what happens if you have it the other way?

 

[upshiftN]

ok does anyone have a clue to how the profec b works around here? Someone please help me out. I need some answers to the questions at the top of the thread. ^^^^^

 

[upshiftN]

Could the hose with the filter be the problem? Like could the filter be bad or something? Or if it comes to it, could it be that my solenoid isn't working? Like when everything's all hooked up correctly, and the power's on the profec while running, can the car still run normally???

 

[upshiftN]

OK... here's what it comes down to. I think the solenoid is working, but not up to par. Either that or my boost guage isn't reading correctly. I turned the "hi" knob up to almost half way, and the boost read about 25 psi at WOT, where as before on minimum settings it was reading 20 psi at WOT. Now I thought that stock psi was 12 on the T25 with the stock pump and injectors... am i wrong? Because the psi showed higher this time, does that mean that it is actually doing something? or could it just be because i tightened my BOV screw.. (would that interfere with boost/psi... loosening and tightening (hardening/softening) the BOV screw?

 

[killakev805]

I had the same problem as you, I bought a used profec and couldn't figure out the on/off selectors. Go to Greddy.com, click on TECH, then click on the profec a&b guide and that will tell you how it is supposed to be.

As far as boost being stock; it won't, you will set the boost on the profec, and the reason it won't be stock is because you are no longer using the stock bcs, now you have a solenoid that you control. The lowest I can set my profec to is 13 psi, but I have boost creep up until 18 psi, so I can't guarantee that being accurate.

 

[upshiftN]

so you're saying that with your profeb b, you couldnt' set it to below 13? Like as in that was the lowest setting you could go? Cause i think that is my problem too. Does that mean something is malfunctioning?

-and also when i turn mine up im assuming it's boost creep, but it's sky rocketing up to almost 30 psi at WOT. What's that all about? Could it just be reading that... and not actually be running that hard??

 

[ozzeran]

Just an FYI for future refernce to the operation of your profec. On greddy's website they have a .pdf owners manual for your controller. Open it up and print it out.

 

[killakev805]

so you're saying that with your profeb b, you couldnt' set it to below 13? Like as in that was the lowest setting you could go? Cause i think that is my problem too. Does that mean something is malfunctioning?

-and also when i turn mine up im assuming it's boost creep, but it's sky rocketing up to almost 30 psi at WOT. What's that all about? Could it just be reading that... and not actually be running that hard??

What really effects how low you can set your boost is the stiffness of the spring on the wastegate. So, if you turn the profec all the way down it will just open depending on the stiffness of your wastegate actuator. I can't tell you if it is malfunctioning, like I said, mine creeps all the way to 18 psi, so there is no way for me to tell if it is accurate below 18psi.

My low boost starts out around 13psi, but it slowly creeps up to 18psi. High boost works perfectly, it stays solid at 18psi, and when I turn it up more it works perfect.

Also, If you are running the stock t25, I wouldn't recommend running anymore than 15psi. After that it loses it's efficiency and blows hot air. Plus it will shorten it's life span, and yes I am sure you will be upgrading to a bigger turbo, but you don't want to blow it and be stuck in a bind because you can't afford the upgrade yet.

 

[upshiftN]

see what's funny is even when i have the profec turned off... my guage reads around 20 psi.. (weird huh!) I thought with the T25 it should read 12 stock with it off. Also... when I have it turned on the lowest it can go, it still reads 20 psi, but then when i adjust the setting up a little... it reads up to 25 and almost 30!!! So WEIRD that it blows my mind!! So basically what you are saying is that my spring stiffness might not be good enough, and it might be worth getting a new wastegate?? Perhaps I should keep this in mind for when i get a new turbo in the future with a stiffer external wastegate.

-Are you using the stock T25 as well? Im just curious to know... because you said yours starts pretty high as well, and you can't get it below 13 on the lowest. Are you in the same boat as I am??