How is the GReddy Profec B controller??

[Jayman]

I was thinking about getting an electonic controller and I was wondering how good was the GReddy Profec B. So I'd like to have you guys input on this controller if you have it. I'd like any opinion that you have on it, but would also like these questions answered if possible:

1. How easy is the install?
2. How do you set it. do you just hop in the car with it turned down, check the boost gauge and then adjust until you reach the desired pressure?
3. What is the function of the balance control knob? The one that varies from mild to sharp?
4. How much boost can this controller hold? Peak boost 18psi, 25psi, 27psi...etc
5. How well does it hold boost, does it help eliminate boost spikes.
and finally
6. Would you recommend it?

Thanks

[Van]

I've got a GReddy ProfecB boost controller and LOVE it!
Interestingly enough, Brent Rau also uses one; but that is probably a sponsor thing...

1.Install is super easy, hardest part is deciding/figuring out where to put the boost "motor" in the engine compartment. I bolted mine to the battery box.
2. Setting is easy, put the dip switches on the back to: 4 up, 3 down, 2 up, 1 down. Pop out the setting buttons/knobs. Set the Balance to 12 o'clock, turn the Lo and Hi buttons to the left (Min) all the way. Use Select button to get the Lo boost led to light up, take her for a spin, go WOT and slowly dial the Lo boost knob clockwise until your Lo boost psi is set, push the Lo boost knob in. Push the Select button again so that the Hi boost led is on. Repeat above for your Hi boost psi setting. When finished push the Hi boost knob and the balance knob in. Your done!
3. The Balance knob allows fine tuning of the wastegate response if you get overboost or unstable boost. Mine is still at 12o'clock.
4. I'm not sure, I heard 27 psi somewhere though...
5. No spikes and rock solid at 19 psi on the 14b! No matter if it's cold or hot outside.
6. Because you have an AWD, YES! If you had a FWD, I might suggest the Apexi AVC-R. The AVC-R will allow you to adjust boost psi at different rpms for better launches with a FWD. It does cost a bit more though.

[Jayman]

Originally posted by Van

2. Setting is easy, put the dip switches on the back to: 4 up, 3 down, 2 up, 1 down.

I'm sorry for all the questions Van, but what are these dip switches for? Are these 4 up, 3 down,..etc settings standard or does it depend on your individual set-up?

[Jayman]

Say for instance I want to go back to stock boost pressure for some reason do you have to completely uninstall the unit or will just turning off the controller hand controller back over to the ECU?

[Van]

The dip switches seem to be adjustable for actuator type or external wastegate or overboost situations...So, the settings I posted are for our stock wastegate type. But you can use the switches to change the way it works when you upgrade or change your set-up.

You know what I've never turned it off, so I'm not sure what'll happen. Probably no boost control at all, not good... But, I have my lo boost set for 11-12 psi boost, basically stock. And I've kept my stock bcs and my "good high tech" bleeder valve just in case I ever need them.

[97GSTAT]

Sorry didn't mean to double post.

[Edited by 97GSTAT on 02-27-2001 at 12:18 AM]

[97GSTAT]

I have one too, and I love it. I really don't know much about installing it thought. Sorry :). But it sounds like Van knows probably everything about that.

[NOSLO2PT0]

I also have the Profec B. Very nice unit. The dip switches in the back are for internal and external WG's. Whichever one you have, you set the dip switches for that particular WG (instructions will tell you how to set).
They are also used for overboosting. Only problem is, if you have boost creep, NO boost controller, manual or electronic, is gonna cure it. Only porting will. I found this out!!

The balance knob is used to determine how quickly the transition from lo to hi boost is. turn all the way to left (mild) and your boost will slowly rise from lo to hi. turn to right (sharp) and you switch over QUICKLY!! Install is pretty easy. As Van said, mounting the "stepper" motor in the engine bay is the hardest part.

Hope this helps.

Mike

[Jayman]

I've heard that if you want to go back to stock boost on the HKS EVC EZ all you have to do is turn off the power to the controller and it will hand the boost duties back over to the ECU, is that the same with the GReddy Profec B or do you have to remove the system.

[97GSTAT]

Originally posted by Jayman
I've heard that if you want to go back to stock boost on the HKS EVC EZ all you have to do is turn off the power to the controller and it will hand the boost duties back over to the ECU, is that the same with the GReddy Profec B or do you have to remove the system.
Yes as far I know. All you have to do is turn it off and it well return to stock boost.

[Endless]

I know this is about the GReddy controller but if you have some extra money to spend for a really bad ass controller the check out the new Blitz DSBC iD. It has everything you can imagine. The brain mounts away from the control unit the control unit is a small LCD screen with a knob and thats it. I just installed one on my friends 91" TSi with a s-20G and once we got found the english instructions on the blitz site it was a snap. performance is great. Drawback is that it costs $719. Ouch!!

[Van]

Wow, for that price you could have a ProfecB and an act2600.

[Jayman]

Originally posted by Endless
I know this is about the GReddy controller but if you have some extra money to spend for a really bad ass controller the check out the new Blitz DSBC iD. It has everything you can imagine. The brain mounts away from the control unit the control unit is a small LCD screen with a knob and thats it. I just installed one on my friends 91" TSi with a s-20G and once we got found the english instructions on the blitz site it was a snap. performance is great. Drawback is that it costs $719. Ouch!!
I was actually looking at that controller and I wanted it too. I was gonna get it but I decided that I could use the money and get other things that I needed. I agree that is a bad azz controller. I think your buddy could have gotten it for a lower price though. I'd never pay $700 dollars for a boost controller. http://www.i-m-racing.com has it for $578.00 if I were to get it that is where I would have gotten it from.

[Endless]

This guy is a member of the new s**t of the week club. if its new and looks cool he's the first to get it. Just his personality.

[Jayman]

Originally posted by NOSLO2PT0
As Van said, mounting the "stepper" motor in the engine bay is the hardest part.
Mike

Can some of you guys post pics of the stepper motor mounted in the engine bay. I'm interested in how your install looks and the size and look of the motor since I haven't seen one before. Thanks

[Boostd4]

As for power off functionality of the Profec. I had a Profec A, and the B model is the same.

When you turn the controller off, the car reverts to wastegate only operation. Meaning, full boost is fed directly to the wastegate actuator causing the wastegate to open at whatever rating the actuator is. For 1G's, I think it's 9-10psi. For 2G's is something like 11-13psi.

Also, as a tuning precaution, I would not tune by the above method. Setting low, making a WOT run and adjusting (at least while WO) is not a good idea.

The MKIV (supra) webpage has a conversion chart for bar/psi. Basically 1.0bar is approximately 14.7x psi. If you know what boost you want to run start at a tenth or two bar below, make a run, then adjust up a tenth till you reach your desired boost level.

HTH,

[phrenzy]

I think I remember this from Physics. 14.7psi=1.0bar=atmostpheric pressure at sea level. You know how the metric system is...makin sense and all, damn europeans. :p

[Jayman]

I noticed on the profec b that there are little dots that go around the hi and low boost dials what values do those represent, for instance if one should start with the controller all the way turn to min what starting point is that 5 psi..etc Also if the dial is set at a certain place and then you move clockwise over to the next dot how much more boost pressure did you add?

[97GSTAT]

Ok it's not the same type that's been asked, but here. How hard is it to install the remote on hte B spec? Has anyone done it? Thanks.

[turbo21psi]

I have a profec-B and I love it. I have friends that used other elec. boost controller that have switched to it.
On a DSM installation is very simple. I mounted my solenoid right under the aircan.

From my experience, I don't think that the little dots actually correspond to any particular boost level. It's mainly there for reference and it CAN correspond to boost levels but that would vary with different cars and how their turbo is setup.

The remote switch is easy to install....it's wireless. Plug the receiving unit in the back of the profec and mount the remote on the steering wheel and your set.

As far as FWD use, I didn't see any problem w/ it. You can set the low boost really low for traction and set the high boost for max boost you can handle. You can switch once you hook. However, I made my best runs running directly on hi boost, w/ no switching.

[Van]

Originally posted by Boostd4
Also, as a tuning precaution, I would not tune by the above method. Setting low, making a WOT run and adjusting (at least while WO) is not a good idea.


Maybe I missed something, but the only way I know of to set boost, no matter what boost controller you got, is a wot run.

Setting the Lo boost is the same as Hi boost, except you dial it in lower, per your tastes. But, that is why you start with the Lo and Hi knobs in the Min. position. :)

The dots are just there for looks as far as I can see.
No pics of it, but it is bolted to the battery box.

[TalonEvolution]

Is the profec-b 1/4 din size?

[Jayman]

Anyone have pics of the stepper motor mounted in the engine bay?

[blunttwister]

the only way to go, not to expensive and is the shit. hi low control,

just get it,
300 new
cheaper used

[97GSTAT]

Someone was telling me that an Electronic BC won't be able to handle 28psi and up. I thought that a Profec B could hold like 30psi. Any anwser's?

[Jayman]

Originally posted by 97GSTAT
Someone was telling me that an Electronic BC won't be able to handle 28psi and up. I thought that a Profec B could hold like 30psi. Any anwser's?
Thats not true. I'm not sure about the GReddy but Blitz has controllers that handle up to 37 psi of boost. Anyways I don't think that many of us here run more than 28 psi anyway.

[fastass4bangr]

I also have a profec-b and like it alot.I have though seen some stupid installs of the control motor.I removed my bcs and mounted it(profec) with a 10mm bolt where the bcs bracket bolted up and drilled another hole for the other side ,which could be instead held by a zip tie.install now looks stock and allows short vacuum line length to the wastegate.