Greddy profec boost controller wont hold boost!

[awdwhip]

i just installed a profec b spec II and it wont hopl the 15 psi i ask it to. it hits 15 and then drops to 11 psi. ive tyed tweeking with the gain and its all the way up to 35% which is as high as it will go. ive also tweeked with everything else but it just wont hold the 15psi. im not to sure if i conected the vacuum hoses to the turbo right and and if their is anybody who have a profec hooked up to their t25 then let me know how you have it hooked up.

 

[fostytou]

The greddys are a bit retarded sometimes. Alot of us have to turn it off and turn it back on after you start the car.... or get a big wastegate actuator and have it off until you want to open up and really get into it. Its probably thinking you are overboosting when you aren't anywhere near where that is. Just hold the button to turn the power off and then back on and see if that helps.

also, make sure you took off all the plastic caps and have the correct side of the line going to your wastegate.

 

[awdwhip]

well i just talked to some guy and he told ma thats its my actuator cuz it will only hold a constant 11 psi and anything else above that it will blow open and loose boost. but thanks for the tips

 

[Injected]

well i just talked to some guy and he told ma thats its my actuator cuz it will only hold a constant 11 psi and anything else above that it will blow open and loose boost. but thanks for the tips

Wait. Someone correct me if I'm wrong but an electronic boost controler will hold shut (not allow the actuator to see boost) until the box sees the set amount of boost and then it rapidly opens the wastegate by allowing the boost to actuate the actuator opening the waistgate flapper. This would prevent the actuator from blowing open at only 11 psi, no?

 

[eclipx]

your t25 is having more trouble holding 15 psi than your bc.

 

[RedTurboEclipse]

2g stock plastic BOV cant hold that much boost.. it leaks and that might be a possiblity..

ur profile says u dont have aftermarket bov..

 

[eclipx]

oh yeah good call. i had the same problem when i put my profec in. i had stock 2g bov, and i wasnt gettin over 11psi. thats probably exactly what your problem is

 

[Injected]

These guys are also correct. A reduction on the backpressure on the turbine will allow the turbo to generate more power by not having to fight the back pressure and spin more freely and thus faster. The T-25 can hold about 14-15psi (not really to redline though). Unfortunatly, the T-25 is best suited (more efficient) for about 10 psi on a 127 cu in motor. Better suited for a 1.6-1.8L motor. What were they thinking?

 

[Injected]

your t25 is having more trouble holding 15 psi than your bc.

This is not correct, it is misinformation. I don't mean this as an insult, it just isn't true. I posted this because of my issues with my BLITZ SBC-ID III. Soon after I hit 21.6PSI and it held to 17. I quickly backed off because I didn't want to run too lean too long.

 

[RichardsGST]

I have a Gready Profec B. I haVE HAD NO PRBLOEMS WITH IT AT ALL. Maybe you did not hook something up right.

 

[FastEclipseGSXT]

I have the profec b spec II working fine. List all of your settings please. boost %, set gain, gain, warning level, warning %decrease. also if it is set for psi or kpa? considering you hooked it up correctly, which is cake, you should only have to play with the settings. You must also know the last max boost the profec recorded?