Ahhh, I see now. Wow thats gotta be a pain in the ***.

 

So get it or save the money? I have an MBC, and I am thinking of going to the EBC route.

 

I just installed my profec specII on Saturday and I've been trying to get it dialed in but I just can't seem to get it to hold steady boost. My settings are as follows: 53% duty cycle, 0 gain, .20 start gain. My boost fluctuates between 1.38bar and 1.2bar. The instruction manual(troubleshooting section) says that if boost fluctuates to turn down the gain, but my gain is set at 0. This is the "high boost" setting as "low boost" is all zero's and running of the wastegate acuator. The install is correct, I've installed many boost controllers, I double and triple checked it and had my friend's check it as well so you can rule out incorrect installation. Any help would be great, thanks. Post your settings please, I know cars differ but anything would help me right now. Thanks.

 

SLOPOK: Check your Serial #. It sounds like you may have a faulty unit as well.

My Gain is at 0 as well.

 

what is the duty cycle? don't see it on mine.

 

SLOP put your start at 1.20 not .20 and try that.
Mjones the duty cycle is set when you turn the knob while the controller is reading boost. Just turn the dial and your duty cycle will show up.

 

Have you seen any spiking with that start?

I tried it that high for a while and it would hit 1.5-1.6 Bar when the turbo first spooled up.

At 1 Bar, I have definitely seen more consistent boost. The controller has been behaving the past two days.

 

My start boost is at 15.0psi, with no spiking problems here.

 

Mine is set to 65% duty cycle, 8 gain, and 61% start gain holds at 17 to 18 PSI depending on the weather. Cool days it holds at 19. Louisiana for you. It takes some time to dial in it right, but with the help of a couple of write ups and some helpful advice. Its worth every penny.

 

I have not seen or noticed any spiking issues with it set at that spot. The turbo seems to spool up very fast with that setting. Around 2750 it starts spooling and at 3200-3250 I am in full boost. I have buschur stage 2 with some extras . Settings are going to vary across the board due to different buildups and mods. But at stage 1 (turboback,intake,s-afc,boost controller) I had it set at 1.20bar for the start and had no problems with spiking my boost was very consistent to 20 psi. Now I hit around 20.5 normal boosting.

Also to the other guys with spiking issues, make sure your boost limiter is higher than your duty cycle or you will get alot of surges. I have my boost limiter % set at 10% so If I do hit 21psi it will drop to maybe 19.5 at the most which will help if it does surge on cold nights. Setting the limiter % more will give you drastic boost reading and surges in power, which will affect over all power output.

Any questions PM me,
Dan

 

Start gain isn't a % number, btw. If you have it at 61, that means your start boost is at 6.1psi. You should bump it up for better response.

Also, for those saying bar mode holds boost better, it's not. The display value will not affect the operation of the solenoid itself. Bar is inherently a smaller value so fluctuations within bar will not be as noticeable.

e.g.
19psi = 1.34bar
18psi = 1.27bar

If it's holding boost better, it's probably your imagination.

EDIT: Well, at least until GReddy can confirm there is an issue with PSI mode, that's what I'll believe (yes they've confirmed a problem but not necessarily with PSI mode) It's just weird to think that the display mode could somehow cause an operation issue with the solenoid.

 

Theoretically, that would set off the WARNING repeatedly during driving though.

 

It does. I have an Autometer gauge that is literally all over the place (5 PSI fluctuations up until redline) in PSI mode. It's much steadier in Bar mode.

Considering this is my first turbo car, I thought that was normal at first.

 

That's weird, my Defi gauge holds steady at 19-20 all the way at redline. It was confirmed when I got dynoed, so maybe I have a nondefective unit...?

 

Sounds like it.

I saw my boost curve on the dyno and it was ugly. It looked like a a bunch of jagged spikes.

I'm going to try and turn down my duty cycle as well as my WARNING. Maybe it's all adjusted to high. (If Quickshift is correct, I'm going to feel like an idiot)