Tuning profec b spec 2...I keep spiking!

[Blk95gs]

I just picked up a Profec-B spec. II, and on my hi setting, I'm set as follows...

boost: 50%
gain: 20%
set gain: 0
limiter: 15%

It keeps 'spiking' at 15 psi, then 'falls off' but eventually settles down at 15 psi. it does this all the time, even when the boost % is down around 30-40%.

Only mods are K&N filter, ACT 2100, TurboXS RFL, and the Profec. I need help, anyone have pointers/like to share settings so I can compare? I can't figure this thing out for the life of me.

 

[nowayout]

try to set your gain and reponse features.

 

[Blk95gs]

If I turn up the gain, that will remedy the 'fall-off', correct? Also, if I get the 'start' boost closer to my 'set' boost, will the turbo spool up faster?

 

[TellschAWD]

The owners manual is very clear on what all of those functions do - have you read it?

 

[sunflashx]

I had to reduce my start boost to around 11 psi when the boost was set to 22 psi to eliminate spiking completely.

I didn't notice the turbo spooling any slower from having done this.

 

[Blk95gs]

The manual is kind of confusing to me, that's why I decided to ask here. Also, I didn't want to crank my levels up too high and cause a problem. I think I got it now though, but I have another question. I hit 10 PSI in first, 13 in second, 15 in third, and around 17-18 in fourth and fifth. Is this how i should be pulling boost? (I'm new at this)

Later,

 

[sunflashx]

It should be the same in every gear.

 

[OverboostXS]

Check your vac lines. Also it could be your BOV i had the same problem but it was my BOV leaking.

 

[Prodigy]

turn ur gain down..also play around with the set boost...also if u need alot more help talk to my partner C5chris he has ur same set up

 

[Blk95gs]

well, i set my high setting the same exact way as my low setting, and even at 9 PSI its still falling off. Could i have possibly hooked something up wrong?

 

[Prodigy]

what is ur psi when the boost controller is off.....also sounds like ur gain is to high..IM C5chris he knows all about the profecb spec 2.... i have and SBc-id sorry bro..

 

[Blk95gs]

its at 9 psi with no control. thanks for the reply, ill PM him.

 

[Prodigy]

you may also have a boost leak....also how long are u lines from the turbo and waste gate...that could also be a problem...9psi sounds kind of low should be like 10-12 at least..

 

[boostmaster123]

the clip for the line that goes from the valve unit to the wastegate doesnt hold the hose to the actuator tight enough. you need to get a small hose clamp that you can tighten yourself...that was my problem. also your gain is a little high..try about 14% and lower your start boost a lot and work your way up until you find the spike, then lower it by about 2 increments.

 

[Blk95gs]

Maybe its the fact that the hose coming off the solenoid is huge, and I had to get a universal hose adapter to fit it onto the tiny ass fitting on my actuator? The hoses are routed as short as possible. Theyre probably 6-7" at best.