Greddy profec B spec II bc doesnt hold boost! need help

[awdwhip]

i just installed the thing today but it wont hold 15 psi. it hits 15 then goes down to 11. ive tryed tweeking with all the settings but still, it wont hold 15 psi. i hope i hope i didnt connect the vacuum hoses to the turbo wrong but if their ins anybody that has a profec hooked up to a t25 then let me know how you have it hooked up. i need help so if anybody ahs any tips then feel free to contribute.

 

[heavyD]

If you want to hold boost on a T25 or T28 for that matter, you need the 17 psi wastegate from Forced Performance.

 

[awdwhip]

any idea how buch boost the actuator can hold?

 

[awdwhip]

any idea how buch boost the stock actuator can hold?

 

[heavyD]

This page explains it quite well:
http://linux.forcedperformance.net/...&Product_Code=WAT28DSM17psi&Category_Code=DSM

It would't hurt to check for boost leaks also but the turbo definately is the main culprit.

 

[awdwhip]

well i dont want to buy 100 dollar actuator. ill do without it then. but i really appreciate the info though, it really helped. im not gonna keep the turbo for too much longer so im not gonna worry about it.

 

[RedTurboEclipse]

when i still had my GST with t25.. no boost control whatsoever.. i was spiking to 18psi and holding at 15psi.. this was with just k&n filter, upper ic pipes and hks ssqv, and free mods.. (bcs mod, dump tube hack)

ur profile doesnt state u have an aftermarket BOV? the stock 2g plastic POS BOV i hear leaks after 12 psi i think .. maybe that could be the problem.. it was only after i upgraded the bov did i start to spike and get more boost..

 

[SexyGsX]

I just got one of these also. I had a mbc before and a different boost gauge and it would spike up to 21 on occassion and settle off at 15 or so. My mods are a Greddy type S, free mods, upper IC, and K&N FIPK. Basically the same as stated before, I have also done the emissions removal. My problem it will only go up to 14 rarely and drop to like 10. With these mods what can I low boost and what can I high boost?