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Old 07-30-2003, 07:18 PM   #1
Henry
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Default GReddy Profec B Spec II, experience?

I just recently installed the EBC in the subject, and I am still trying out different settings. I would like to know if anyone has experience with this new unit on a stock turbo. If so, what are your setting values?

I've tried using the set, gain, and set gain values from the SBC-iD. But it seems quite different when I entered it into the Profec B v2.

Thanks.

Henry
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Old 07-31-2003, 12:51 AM   #2
WRXMikeH
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I have one in the mail from Gruppe-S... Never having used an EBC before, I expect it to be a fun experience. Don't expect the values from both EBCs to be close, those are completely dependent on the solenoids used and how it was programmed. The basic concepts still apply though.

I'm guessing the "set" sets the transient response, and the gain is what affects the overshoot (and rise time). Is the manual in english?
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Old 07-31-2003, 04:44 AM   #3
Henry
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Yes, the manual has both Japanese AND English. But both language reads like jibberish when it comes to technical descriptions.

Thanks for the reminder on the solenoid issue. I am n00b when it comes to turbo cars.
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Old 07-31-2003, 07:58 AM   #4
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henry - you say you used the values from an sbc-id, this leads me to believe you had one, if so how was it and what boost settings did you run on the stock turbo? all i have is a turbo back
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Old 07-31-2003, 03:35 PM   #5
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Hi racewagon,

I've never had an SBC-iD, but was definitely considering it. But I got the GReddy one new at cheaper price than people are selling the Blitz one used. Not that the price wasn't reasonable, since the SBC-iD is considerably more complex with more options to utilitize.

The SBC-iD values were grabbed from doing searches on here. Needless to say, I had to go through all these postings that just mention the word "set", "gain", "boost"... etc.

Right now, my remedy has pretty much been leaving the set, gain, and set gain as is, and regulate it from overboosting by turning up the limiter at 50%, while setting the warning signal at 17psi. What the limiter does is lowering the "set" value certain amount so I am boosting around 15 - 16 psi. Kinda redundant. So if I can just get the settings right, then I won't need to turn the limiter on.

With that said, the Greddy Profec B Spec II is a pretty damn good unit when it comes to protect your turbo from overboosting. ;p

Henry
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Old 08-01-2003, 12:11 PM   #6
WRXMikeH
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Henry,

Where did you mount your control unit? I just got mine in the mail and look forward to installing it soon. I was thinking of putting it where the clock is on the dash.
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Old 08-01-2003, 01:12 PM   #7
Henry
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That was my immediate thought, too. But then the clock is more exposed to the sun and the area is likely to get hotter. So I decided to put it where the ashtray is. No cutting is needed there, either.
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Old 08-01-2003, 06:05 PM   #8
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Cool...any pics? Did you remove the ashtray and replace w/ the Profec?
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Old 08-01-2003, 06:18 PM   #9
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I'll take some. Stay tuned.
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Old 08-08-2003, 10:40 PM   #10
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Hey, i'm curiousa about this too. Right now for my high setting (profec-b spec 2) I have a gain of 15%, set at 50%. I dont know where to set the start boost, however!
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Old 08-09-2003, 06:49 PM   #11
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Apparently, "Start Boost" is a setting that you can toggle to tell the EBC when to start releasing the boost pressure. I set mine at "120" (12psi) on the low setting.

Anyone else?

Thanks.
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Old 08-13-2003, 12:36 AM   #12
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Hi!

For the Greddy Profec B V2, I would recommend high boost setting of no more than 45% and 15% gain on 91 octane w/basic bolt ons. Usually we end up hitting boost cut in 4th and 5th gear at anything past 45% at high RPMs!

Gary
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Old 08-14-2003, 01:54 PM   #13
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Gary at Gruppe-S was the person I consulted for a setting reference. I am still trying to figure things out but... really thankful for the help! Thanks again.
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Old 09-15-2003, 12:20 PM   #14
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Ok...I FINALLY installed and tuned my Profec B spec II.

My settings for high boost -

set 43-44%
gain 15%
start boost 14.2 psi

low boost -

set 33%
gain 15%
start boost 12 psi

I'm still tweaking it. It seems pretty damn sensative to weather changes...I'm always messing with the set value to get ~16.5 psi. I wish it were a little more solid in that respect. I have a problem with the unit also...if I do not reset the peak boost EACH time I drive it, the unit thinks I'm overboosting at ~12 psi when my limiter is set up near 17. Clear the peak boost, it works great. Any ideas?
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Old 09-15-2003, 07:35 PM   #15
M32WRXin3seconds
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Default wrx mike H

what mods do you have? are you running 16.5psi with just an ebc?
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Old 09-15-2003, 08:20 PM   #16
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Shhh, don't tell anybody:

Uppipe, downpipe, catback (no cats anywhere), Blitz SUS intake, silicon IC hoses, polished TB (Quantum Racing), IC splitter (QR again), various headshielding inc. wrapped DP and turbo heat shield, vishnu pulley, etc. I'm sure I missed something small, but that's about it.

I have some gauges also, boost, A/F (not working, see post in Electrical forum), and EGT (not hooked up, stupid, I know).
A/F post - http://forums.nasioc.com/forums/show...hreadid=389090

Oh yeah, Denso IK22 plugs (iridium, 1 step colder).

Thoughts?
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Old 09-15-2003, 08:54 PM   #17
M32WRXin3seconds
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Default sounds good...

basically i bought this item and its new in the box...i guess its useless but i didnt realize that til later.

i have
Hks catback
Utec
Helix dp/midpipe
gruppe-s up pipe
K&N drop in
GFB bov
and alot of other mods that dont increase hp
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Old 09-15-2003, 08:56 PM   #18
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Default my question...

which i need to be answered soon. should i keep it? (my ebay auction ends in like 16 hours...) is it really worth it because i also have a utec...
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Old 09-15-2003, 11:24 PM   #19
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Well, I would say that depends on how comfortable you are with tuning the UTEC under closed or open loop boost. Some people claim it's cake, some people think it sucks.. I say pick the unit that you feel has more features and is easier to tune...they both do the same thing in the end.



Now, can anybody answer my question about why the damn thing wants to limit my boost too early if I don't clear the peak boost??
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Old 09-15-2003, 11:26 PM   #20
M32WRXin3seconds
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Default you should PM

gruppe-s or ask around on a board that uses boost controllers more...supras, evo's etc..where they have less items like xede, utec, reflashes etc
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Old 09-15-2003, 11:33 PM   #21
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Very true, I am looking into that now!
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Old 09-16-2003, 01:32 AM   #22
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[quote]Originally posted by peewee111
[b]i have a 03 wrx with a full turbo back, and bov. i just put the spec 2 in aswell, i put mine in right next to the cup holder in the dash. enough small talk, here are the pirameters i put in to get about 11.5 psi in lo and 15.5 psi in high.

lo- gain 6%, set gain 105, waste gate 28%

hi- gain 8%, set gain 145, waste gate 44%


p.s. i think my gain % is wrong but it runs pretty good


keep truckin'... good stuff
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Old 09-16-2003, 12:52 PM   #23
WRXMikeH
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Titan Motorsports was kind enough to respond about the limiter problem - they said they did not know of a way around it...the peak boost must be cleared each time you drive the car to avoid false triggering of the limiter at low boost. I am not sure if overboosting on the prior run affects this condition.
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Old 09-16-2003, 05:11 PM   #24
peewee111
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just re-tunned my spec II and the low boost is as so near perfect its ridiculous and the high boost is just about perfect as well

lo- 12% gain 100 set gain 26% wastegate


hi- 10% gain 140 set gain 42% wastegate



keep truckin... good stuff
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Old 09-17-2003, 12:49 PM   #25
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Quote:
Originally posted by Gruppe-S
Hi!

For the Greddy Profec B V2, I would recommend high boost setting of no more than 45% and 15% gain on 91 octane w/basic bolt ons. Usually we end up hitting boost cut in 4th and 5th gear at anything past 45% at high RPMs!

Gary
Gary, sounds like you da man to go to....

I've got a Stg 1 Unichip....IC Hoses and running 93-94 octane.
I was up around 47-48% SET, upper-20% GAIN, 140 on the SET GAIN at the HI setting. I'm trying to get around 16psi in the high setting and factory boost on the low setting.
I am basically hitting my target boost....so am I safer w/the higher octane gas?? Should I lower the Gain %??

I tried asking this a couple of weeks ago to no avail
......Pls calm my fears....Thanks
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