ok guys im still having problems getting my car to hold steady boost. what should i look for??? ive checked the piping and it seems to be good. could it be the bov?

boost will go up to lets say 8.5 lbs , then go down to like 7.9 right away , then slowly creep down to like 7.4 , i dont get why it wont hold boost , is it my boost controller?

 

have you tried adjusting the gain? what about the dip switches on the back?

 

ok i just got back from fiddling with it , i took off the boost controller vacume lines ,and put it back to stock boost. and it held boost at 5.5 like its supposed to , so i can rule out a boost leak.

what do the things on the back do? and i have tried everything on the boost controller to get it to hold boost and it just fluctuates.

gain cant be set higher than the target boost pressure % right?

 

did you try reading the manual? it explains all that.

 

i have that boost controller
turn the gain DOWN, mine hold boost perfect

 

but the boost is falling off , meaning the gain should go up!

 

i dont think mine had those little switches on the back , its a profec b 2

 

for the regular profec B in the directions when its says your overboosting on a external wastegate to change the settings on the back to......

4 3 2 1
. ' . '


edit - you have a spec 2 ...... oh well i dont know **** about those

 

ya i dont see anything like that in the spec 2 manual

 

bump

 

bump can anyone help

 

man i had the same problem but with the reg. profec B, i just switched to the turbo xs mbc and it solved all my problems

 

bump cuz i'm wondering the same.

 

ya i might just turn my wastegate actuator up man and **** the ebc....

 

you need to put the set gain about 2 lbs lower than whatever you want to boost to, that stops if for fluctuating the wastegate to try and compensate for the pressure drop. You need the gain around 20%, and adjust with set, not gain. If this isn't your problem then you have it hooked up wrong.
I have a 9 lb spring in my Tial, and make 12-13 on low boost and 16-17 on high boost. I can't remember what the high boost settings are, but low boost is 19% set, 20% gain, and set gain is 105. Remember this is all in lbs, not bar, because I'm a US citizen, and refuse the ******* metric system (haha)

 

start gain is 105???? are we talking about the brofec b ll here?

 

sorry man, maybe I meant set gain....its whatever is after the gain setting when you're pushing the mode button...dude, you got the same manual I did, read that bastard for about 3 days, and the Engrish becomes your second language...remember set gain is in lbs, not percent like the rest of that **** is...

 

see that i didnt know , i read it , but i guess not good enough. ovbiously hehehe

 

sorry but can you guys explain what the does start gain, set, and set gain function as?

 

ok im playing with it and im starting to get it.....im just trying to tune for 8 lbs
so i set the set gain to like 6 , then gain to 20% , then like 15 for the pressure. still cant get it fine tuned i dont know which way to go with it

 

keep adjusting man, a little bit at a time....how big of a spring do you have...in lbs, I don't deal with that bar ****...

 

ya i dont talk in bar either **** that crap , its an internal wasegate at 5.5 lbs......

so i set my gain to 20% , and set gain to 6 lbs cause i want 8 lbs , then adjust with the pressure right? the one where you just turn the **** , you dont press mode to get to.

 

right on man

 

thanks man i appreciate it , i had this thing so fucked up and backwards in my head..... i thought set boost was in % just like the others , i thought the pressure setting was what you wanted your boost to be at , and i didnt think you could set gain higher than the pressure.....i was all fucked up

 

another thing you might want to watch is raising the gain, it helps hold boost steady, but too much will make it spike...