Need help: reguarding boost controller
06-05-06, 10:26 PM
#1
Need help: reguarding boost controller
Okay here we go:
Bought a GReddy PRofecB Spec II boost controller and did countless hours of searching to figure out how to hook it up. I looked at a thread that illustrated two different versions to hook it up. I did version two, tee'ed the two turbo outlet nipples together and took it to the stepper motor. Tee'ed the WG and PCA together and also took that to the stepper motor. There is three openings on the stepper motor so one is vented. Capped off all that needed to be capped and took it for a drive. I started with the boost controller off, 8psi which is good. Turned the boost controller on, changed the gain all that jazz and got 8-8-8. Tuned it some more, turning up the gain, set gain and start boost more, I got 8-8-9. After five hours of messing around with this thing, I got upset and turned everything up to the highest possible setting on each mode. STILL NO CHANGE 8-8-9. I thought with the highest setting possible it should produce around 43psi? Can someone help because I don't know what else it could be. All electrical, hoses, caps are in place. Is the one hole that is vented on the stepper motor should go to something? I don't think I have a boost leak because with the controller off it's getting the lowest factory boost setting. Any feedback will help. Thanks
Bought a GReddy PRofecB Spec II boost controller and did countless hours of searching to figure out how to hook it up. I looked at a thread that illustrated two different versions to hook it up. I did version two, tee'ed the two turbo outlet nipples together and took it to the stepper motor. Tee'ed the WG and PCA together and also took that to the stepper motor. There is three openings on the stepper motor so one is vented. Capped off all that needed to be capped and took it for a drive. I started with the boost controller off, 8psi which is good. Turned the boost controller on, changed the gain all that jazz and got 8-8-8. Tuned it some more, turning up the gain, set gain and start boost more, I got 8-8-9. After five hours of messing around with this thing, I got upset and turned everything up to the highest possible setting on each mode. STILL NO CHANGE 8-8-9. I thought with the highest setting possible it should produce around 43psi? Can someone help because I don't know what else it could be. All electrical, hoses, caps are in place. Is the one hole that is vented on the stepper motor should go to something? I don't think I have a boost leak because with the controller off it's getting the lowest factory boost setting. Any feedback will help. Thanks
06-06-06, 07:21 AM
#4
I'll check today, but I hooked the vaccum lines up according to the GReddy instruction book so I don't think that is wrong either. Yes I capped all four things, the PCA acuator, the WG acuator and the to metal lines that run to the solenoids.
06-06-06, 07:26 AM
#6
Do you have a hi/lo test light? It sounds like you either hooked your boost controller up to the wrong side of the actuators or your stepper motor is not getting any signal from your control unit. Try testing the power line to see if its "hot" while the car is running. If its not getting current theres your problem.
The correct actuator nipples are the ones on the passenger side of the car.
The correct actuator nipples are the ones on the passenger side of the car.
06-07-06, 01:36 AM
#7
I have the boost controller hooked up to the actuator nipples closest to the passenger side. I will try to see if the stepper motor is getting current. I'll also check to see if I put the right lines on the correct side of the stepper motor, I highly doubt I did it wrong but something has to be wrong. I hope it's just an electrical problem though. Thanks everybody so far for options.
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06-07-06, 09:04 PM
#9
Ok I checked for current and the stepper motor is getting current. Will somebody please verify that the lines coming from the turbo compressor goes to the NO side and the lines from the actuator goes to the COM side. That is the only thing else that I think could be wrong. Keep in mind I did version 2. Look at the first post if you don't know what that is. I took it for another test drive and the settings are: set 45% set gain 45% and gain is 75. Still getting 8-5-8, factory settings. I don't understand.
06-07-06, 09:39 PM
#11
Eats, Sleeps, Dreams Rotary
ugh...you made me have to search.
http://www.greddy.com/
goto the tech section and dl the Spec-2 manual.
It says on page 9 that from the pressure source is the "NO" and to the actuator "COM"
http://www.greddy.com/
goto the tech section and dl the Spec-2 manual.
It says on page 9 that from the pressure source is the "NO" and to the actuator "COM"
06-07-06, 09:51 PM
#13
Eats, Sleeps, Dreams Rotary
You might want to ask someone who has the spec 2
there is a greddy write up on "lightening in the world of thunder" site
http://www.fd3s.net/profec_install.html
there is a greddy write up on "lightening in the world of thunder" site
http://www.fd3s.net/profec_install.html
In summary here's how it works:
The smaller diameter line provides manifold pressure info to the controller via the stepper motor (Nipple "Y").
While building boost, the pressure (from the front turbo outlet nipple) being received by the unit (nipple "E") is vent out to atmosphere by the relief nipple on the bottom of the stepper motor. -> the WG remains closed.
When the preset boost level approaches, the boost pressure is rerouted out to the WG actuator via nipple "G." Since the WG actuator is now open on only the nipple that goes to the Profec, the pressure in the actuator builds to the point at which it overcome the closing force applied by it's internal spring -> the actuator begins to open (about 7 lbs.). At about 10 lbs., the WG spring is fully compressed, and the WG is full open. The Profec regulates the WG to maintain the desired boost levels.
The smaller diameter line provides manifold pressure info to the controller via the stepper motor (Nipple "Y").
While building boost, the pressure (from the front turbo outlet nipple) being received by the unit (nipple "E") is vent out to atmosphere by the relief nipple on the bottom of the stepper motor. -> the WG remains closed.
When the preset boost level approaches, the boost pressure is rerouted out to the WG actuator via nipple "G." Since the WG actuator is now open on only the nipple that goes to the Profec, the pressure in the actuator builds to the point at which it overcome the closing force applied by it's internal spring -> the actuator begins to open (about 7 lbs.). At about 10 lbs., the WG spring is fully compressed, and the WG is full open. The Profec regulates the WG to maintain the desired boost levels.
06-08-06, 08:40 AM
#14
I don't know what is wrong. I do have a manual, and I hooked it up the way it said. I was just trying to trouble shoot and make sure our cars go with the instructions in the manual. It's easy to understand what the boost controller does. It just kills me that something this simple, cannot work and I can't find the reason why. I must have a defective boost controller, that doesn't make sense either because it is new. I don't know.
Last edited by nyteryder; 06-08-06 at 08:54 AM. Reason: I searched it
06-08-06, 07:56 PM
#18
Eats, Sleeps, Dreams Rotary
You have a boost line going to the profec itself right?
If you can I would try to swap out the Profec with one that you know is working to eliminate the possibility.
If you boost was working correctly before, and it seems like you hooke everything up right. It should be working fine now. If you can take a picture of your plumbing and post it....just in case.
If you can I would try to swap out the Profec with one that you know is working to eliminate the possibility.
If you boost was working correctly before, and it seems like you hooke everything up right. It should be working fine now. If you can take a picture of your plumbing and post it....just in case.
06-10-06, 01:49 PM
#22
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Originally Posted by nyteryder
No I didn't cap the soleniods themselves. Do you have to?
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