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b5a4lover
12-04-2007, 09:36 AM
just got mine and was wondering if there were any DIY writeups anywhere? i've searched but couldn't find any. the only thing i've found is the tech article from greddy, but it comes with like 6 different instruction sets for different cars. I know we have a boost regulating solenoid valve (n75), but is it a poppet valve, or swing valve type 1, or swing valve type 2? and am i completely bypassing the n75? is there a way to run it with the n75 like you can with a mbc?

here's the link- http://www.greddy.com/img/PHP/products/pdf/687.pdf

thanx for any help[az]

b5a4lover
12-04-2007, 10:46 AM
k so i have been trying to figure this out. i bought it used so the previous owner pretty much just cut everything and im trying to figure out how he ran it on his a4.

http://i101.photobucket.com/albums/m49/chaos92287/S5000416.jpg

http://i101.photobucket.com/albums/m49/chaos92287/S5000418.jpg

So is it alright how he did his IN line? and im guessing the top right of the 3 way joint went to a boost gauge (because of the hose used) and then the top left went to the intake mani and fpr. is this alright?

if its alright the way it is, im gonna go install it, if not i'll jus run to the store and pick up some tubing and redo it

b5a4lover
12-04-2007, 12:03 PM
anyone? i really wana intall this...

b5a4lover
12-04-2007, 12:12 PM
just found this wire
http://i101.photobucket.com/albums/m49/chaos92287/S5000420.jpg
http://i101.photobucket.com/albums/m49/chaos92287/S5000419.jpg

how do i fix this? i cant seem to find a way to open the clip to try and reinsert the wire...

bandit
12-04-2007, 12:26 PM
I think Poopie has a EBC ask him

GotRice720
12-04-2007, 04:08 PM
This tread may help.
http://www.audizine.com/forum/showthread.php?t=123137

I have the Greddy Spec II and have the N75 plugged in but looped to it's self. You can still run without it but the I feel the ECU feels better knowing it's there.

Hope this helps

b5a4lover
12-04-2007, 04:16 PM
yeah, i've been searching threads like crazy and have found that one already, im basically just trying to figure out if how he had it hooked up will work correctly, or if i should just get all new tubing and do it how it is in the greddy diagram...but thanx!

GotRice720
12-04-2007, 04:27 PM
When I first got mine I just used the manual from Greddy's site and has been working perfectly for awhile now. I know you cannot use both like the MBC setup but someone correct me if I'm wrong.

mike-2ptzero
12-04-2007, 05:27 PM
The small black box replaces the N75, this means one side gets the pressure line from the compressor housing of the turbo and the other goes to the wg actuator. The left over line goes to the actual control box that you put inside the car, this line goes to the intake manifold like if your installing a boost gauge. This is so the unit knows how much boost is being made at the intake manifold.


Looking at their instructions you install it like the show for the swing valve 2, but since we dont have a hose coming from the IC pipe you just connect the pressure line from the bango bolt at the turbo compressor housing to the greddy control valve for the IN line.

b5a4lover
12-05-2007, 02:40 AM
thanx for the explanation Mike, looks like i gotta re-wire it and solder that wire back together

mike-2ptzero
12-05-2007, 03:39 AM
thanx for the explanation Mike, looks like i gotta re-wire it and solder that wire back together

I wonder why the other person cut that wire, looks like that wire should be connected to that other plug with the red and black wires on it.

jrodmk2
12-05-2007, 07:27 AM
if i only had mine hooked up. :(

killa
12-05-2007, 04:12 PM
keep the N75 plugged .

The big black box has an IN and OUT, get manifold pressure and hook it up to the IN, then hook up the OUT to the top of the wastegate.
You also need to put straight manifold pressure on the side of the wastegate so you can even "T" a manifold pressure line then one side goes to the IN and the other to the side of the Wastegate, it's pretty simple, shouldnt require pics

killa
12-05-2007, 04:13 PM
I wonder why the other person cut that wire, looks like that wire should be connected to that other plug with the red and black wires on it.

Yes, definatly, the green wire must be fixed.

mike-2ptzero
12-05-2007, 07:22 PM
keep the N75 plugged .

The big black box has an IN and OUT, get manifold pressure and hook it up to the IN, then hook up the OUT to the top of the wastegate.
You also need to put straight manifold pressure on the side of the wastegate so you can even "T" a manifold pressure line then one side goes to the IN and the other to the side of the Wastegate, it's pretty simple, shouldnt require pics

Sounds like your giving directions to do the install for a external wg?


Note, always use a pressure line for the IN that is before the throttle body. You dont want to have vacuum in that line.

Don Supreme
12-05-2007, 07:24 PM
Why no vac?

mike-2ptzero
12-05-2007, 07:45 PM
Why no vac?

Because you want that line to have pressure all the time which it will even while the throttle body is closed. I felt a big difference going from that line being hooked up to the intake manifold vs how it should be hooked up like the N75 valve right to the compressor housing.


Since the line is the feed line to the step motor there is no reason for it to put vacuum to the step motor, the vacuum/pressure only needs to be sent to the main unit so that it can read vac/boost.

esss_pho
12-05-2007, 09:27 PM
im guessing this isnt going to be on a k04'd car

mike-2ptzero
12-06-2007, 05:45 AM
im guessing this isnt going to be on a k04'd car

Well the person that started the thread didn't say what turbo it would be used with but his sig lists a K04.

esss_pho
12-06-2007, 09:03 AM
is there any gain to using a ebc on a k04's car (apart from quicker spool up)..considering stock software usually tapers boost...

mike-2ptzero
12-06-2007, 09:20 AM
is there any gain to using a ebc on a k04's car (apart from quicker spool up)..considering stock software usually tapers boost...

No there isn't because it isn't the software or N75 that tapers boost, it is the fact that the turbo cant really hold boost to redline unless you run less then 18psi. The more boost you run the quicker it tapers off.

d1rt
12-06-2007, 10:44 AM
This thread of for the Profec B-Spec I right? Do the same principles apply to the B-Spec II?

GotRice720
12-06-2007, 11:38 AM
I have the Spec II myself and it works the same way.

d1rt
12-06-2007, 12:15 PM
You set yours up how the Spec II manual says? Thats how mine is set up. Youre BT though.

b5a4lover
12-06-2007, 12:34 PM
I wonder why the other person cut that wire, looks like that wire should be connected to that other plug with the red and black wires on it.

actually it goes to a plug that has white and green wires just like it. i doubt he cut it, i think it happened while shipping. so im just gona take the two clips out and solder the wires directly

b5a4lover
12-06-2007, 12:38 PM
No there isn't because it isn't the software or N75 that tapers boost, it is the fact that the turbo cant really hold boost to redline unless you run less then 18psi. The more boost you run the quicker it tapers off.

yes its on a k04. my software is running ~16psi, and i got the profec b for $100. i was gona run 20psi, or would you recommend only running 18?

mike-2ptzero
12-06-2007, 01:25 PM
yes its on a k04. my software is running ~16psi, and i got the profec b for $100. i was gona run 20psi, or would you recommend only running 18?

I would try 18psi first and do some logs with a vag to make sure everything is good, also log the maf readings to be able to compare them if you decide to try out 20psi because the maf readings will let you graph your hp curve and you will be able to see where it peaks on both setups. Would also be good to do that now just running the 16psi with the N75 valve.

GotRice720
12-06-2007, 02:22 PM
You set yours up how the Spec II manual says? Thats how mine is set up. Youre BT though.

The manual has two setup options, external or internal WD. I followed then manual and had no problems. I had this before I went BT, only change is that I ran run higher boost settings.

killa
12-06-2007, 07:25 PM
I have the same boost controller on my A4 and have been using it this way in other cars. The diff between setting the IN before or after the throttle might be a fraction of a second in reaction time if anything. Works fine and no need to tap into the pre Throttle hose/pipe. However Greddy does list that in their own instructions.
Again, doesn't really matter and yes, it was for an externally gated setup since i said to run both ports of the WG.
hth
P

Poopie
12-06-2007, 07:28 PM
you already have a charge pressure nipple on the compressor housing of the turbo you should use.

killa
12-06-2007, 07:30 PM
you already have a charge pressure nipple on the compressor housing of the turbo you should use.

agreed, but the difference is minimal, at least in my experience so i decided to use a T instead. The actual instructions call for it to be in the charge pipe was mike said.

Poopie
12-06-2007, 07:33 PM
I just follow the instructions. From what I've read you shouldn't have the pressure sensor and the boost controler on the same side of the throttle body.

killa
12-06-2007, 07:35 PM
I just follow the instructions. From what I've read you shouldn't have the pressure sensor and the boost controler on the same side of the throttle body.

I didn't want to tap the compressor housing, my T04S is a full Garrett and doesnt have the tap on it, that's why i ran mine like that, works fine, take you for a spin if you're in the area if you like. [;)]

Poopie
12-06-2007, 07:49 PM
haha I believe you. I don't know if you check the regional forums but I'm setting up a dyno day at philly dyno works. I'm hoping for a group rate $75 for quattro and $55 for FWD 4 runs and wideband. I'm aiming for Jan 5th Saturday.

killa
12-07-2007, 09:41 AM
no, i barely show up here as it is. Philly is about 2 hours from me so it's a no go. Thanks anyway.