Hello,

 

I have just had a GReddy Profec B Spec II boost controller fitted to my motor by Z-Tech however it wasn't setup and I am now trying to get this sorted.

 

I have read the instructions and understand (mostly) what each parameters varies.

 

I have also used the recommended settings posted on here a while ago, the problem is however I cannot get anything above 10.5 PSI no matter what settings I use.

 

Does anyone have any ideas as this is frustrating after spending big money on something that is currently useless. The car also has just had BOV's fitted.

 

Lloyd

what settings are you using?

Ok, here are the settings from my Profec B spec 2, to achieve 9psi in LO and 14psi in HI, on stock turbos:-

LO:- SET=16%, GAIN=18%, SETGAIN=48, WARNING=110 with a drop of 20%

HI:- SET=33%, GAIN=21%, SETGAIN=85, WARNING=155 with a drop of 20%

The boost signal is tee'd in from the right hand side of the plenum balance tube.

Also I have a dual friction clutch which seems to be able to handle it.

IIRC there is a link in an old thread that explains it in pretty clear english. This is the best route to go because you will know how to adjust it for yourself rather than just copy someone else's.

 

If I had the time I would try and search it for you. LOL...

 

edit - I got bored and went looking for it LOL.

 

click here for installation

click here for how to set it up

 

enjoy...

Ok, yes those settings Giant Slayer gave were around the ones I've used. The thing just won't boost over 10.5 PSI though....

 

Is the controller supposed to make high frequency clicks when its boosting in the LO mode ?

 

 

Lloyd

boost leak?

Ok I found out the standard boost solenoids were still connected with the black square connectors so I've just disconnected those and the boost is now increasing and then dropping off at around 8.5PSI max but again it won't boost any higher. It is behaving differently now the black connectors have been disconnected.

 

Do the little silver pipes (I think coming off the standard boost solenoids) need to be blocked off ?

 

Lloyd

Dunno about the pipes, but FWIW my settings are:

 

50%, 5, 1, 14.1, 15% (starting with boost % and doing the rest in the order they cycle) and I get a very consistent 13.8psi (slightly less in hot weather/slightly more in cold).

 

That's my high setting - I don't bother with a low one as my right foot is clever enough to know when it shouldn't misbehave.

Hello,

 

I have just had a GReddy Profec B Spec II boost controller fitted to my motor by Z-Tech however it wasn't setup and I am now trying to get this sorted.

 

I have read the instructions and understand (mostly) what each parameters varies.

 

I have also used the recommended settings posted on here a while ago, the problem is however I cannot get anything above 10.5 PSI no matter what settings I use.

 

Does anyone have any ideas as this is frustrating after spending big money on something that is currently useless. The car also has just had BOV's fitted.

 

 

 

 

 

hey there,

 

had same probs with my profec b spec 2 controller too, never got above 10 psi!!!!!!!!!!!

 

found out after alot off searching, my mechanic only plumbed in to 1 turbo!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

check you are connected to both turbos, if not, 1 will want to boost high and the other will want to stay at its limit.

 

 

hope this helps.

 

alan

Alan, what tube was only connected to the one turbo ?

 

The tubes are t'ed off but I will have another look.

 

also does anyone know if the boost controller itself (not the solenoid) is supposed to make funny high frequency clicking noises ??? Because mine does ! ?

 

I might have a faulty boost controller.

 

Lloyd

I have been told to remove the stock solenoids by noble motorsport today so then you only have one solenoid, not two sets fighting each other?

 

This makes sense as then you would have a shut circuit when the ebc is off and the wastegates would open with mechanical pressure only at 7 psi.

 

Then the ebc comes on and its solenoid bleeds the pressure causing the gates to open later.

 

Does anyone have any info on what is need to be done to disconnect the stock solenoids, ie do you have the leave the electrics connected from the ecu or can these be removed as well, ie the solenoids be removed totally instead of just bypassed?

anyone?

I have disconnected the black square connector that is the wiring to the std boost solenoid (one either side) it has not caused any problems with running. I am hoping doing this won't affect the timing fueling in any way as I guess its wired into the ECU ????

 

I recon its flagged up some error code though.

 

Tonight I will get under the motor and check to see whether the tubing bypasses the std boost solenoids.

 

If this fails then I'm posting the headunit back to the shop (they are a right bunch of muppets and haven't been much help either).

 

Lloyd

short the obd2 plug for error and see if you have any

 

nb you have to disconnect the battery for some time to clear the error code if you have one

I have been told to remove the stock solenoids by noble motorsport today so then you only have one solenoid, not two sets fighting each other?

 

This makes sense as then you would have a shut circuit when the ebc is off and the wastegates would open with mechanical pressure only at 7 psi.

 

Then the ebc comes on and its solenoid bleeds the pressure causing the gates to open later.

 

Does anyone have any info on what is need to be done to disconnect the stock solenoids, ie do you have the leave the electrics connected from the ecu or can these be removed as well, ie the solenoids be removed totally instead of just bypassed?

 

No need to remove them Ed, just disconnect the black connectors :)

ahh so if i just disconnect the electrics to them. Will that make them shut all the time giving wastegate mechanical opening presure of about 7psi?

Correct :)

will the ecu not error with them disconnected tho?

Not from experience no. Don't even think there is an error code for the solenoids...

No dont think so either, cheers Andy you have cleared that up for me.

 

:duffer:

So anyway,

 

To get more than 10.5psi do I also need to fit boost jets ?

Something is stopping the turbos reaching the goal of 14psi.

No obvious sign of a boost leak.

Has the boost controller been installed correctly with the two turbos Tee'd together ?

Yes they are tee'd, installed "professionally" by Z-Tech

So anyway,

 

To get more than 10.5psi do I also need to fit boost jets ?

Something is stopping the turbos reaching the goal of 14psi.

No obvious sign of a boost leak.

You don't need boost jets but it does sound like something is wrong.

 

It could be a number of things. sorry, I know that is not much help...

Andy pointed a few things to check so I'll do these and then the only thing left to do is send the boost control head unit back for another.

 

Does the tube that connects to the hard pipes (leading to the throttle bodies) need to be tee'ed to both sides ? Don't know the function of this tube as the boost controller also has a single tube that connects into the plenum via a filter to measure the boost pressure. So what exactly does the other tube do ?

 

Lloyd