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Old 02-21-2007, 11:40 AM   #176
ride5000
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Quote:
Originally Posted by IMPREZive 02 WRX View Post
I thought it was supposed to be re-routed to the intake when the solenoid's energized.

When the solenoid's not energized, the intake's blocked off, and when it is energized, the intake is connected to the wastegate if you plumb it the way it's described in the OP.
solenoid on = more boost = block signal from wga
solenoid off = less boost = route signal to wga

it doesn't matter what you do with the other port. block it off.

hth
ken
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Old 02-21-2007, 07:17 PM   #177
IMPREZive 02 WRX
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Quote:
Originally Posted by ride5000 View Post
solenoid on = more boost = block signal from wga
solenoid off = less boost = route signal to wga
I understand that You can achieve that by plumbing it either way, but plumbing it so that the boost signal is diverted to the intake (like the stock setup) instead of blocking it puts less stress on the solenoid. I was just trying to set the record straight for which port does what. I give up, everyone plumb it whatever way you want. I know which way I did mine.
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Old 02-27-2007, 01:24 AM   #178
bren wrx
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looks like there is more to it then the pigtail and the solenoid

is the vacuum line restrictor and 10ohm a must with a reflash? id rather rock solid boost
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Old 02-27-2007, 02:02 AM   #179
KAX
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resistor not a must, no.

for vacuum line restrictor, you do not want one at all.

basically you need the solenoid, pigtail and hoses.
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Old 02-27-2007, 09:58 PM   #180
B16A2NR
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How long did it take to recieve your solenoid and pigtail from Rockauto? I purchased mine Feb21st and it still says "awaiting shipment"
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Old 02-27-2007, 10:35 PM   #181
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This mod worked out so well for me.

I had 100% wgdc's only netting me 19.5psi max on a 2 liter vf39 combo. Now 70% wgdc is hitting 20psi in first gear and targeted 22psi @ 4150 in second. Once boost onset occurs, watch that needle swing! No boost hunting or any issues of the sort, even with aggressive turbo dynamics maps.

...and if you drill out the mounting tab a bit and reuse the factory isolator grommet, it's just as quiet as oem.

Good times...

later, x
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Old 02-27-2007, 11:16 PM   #182
06rexwagon
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Originally Posted by xFactor View Post
This mod worked out so well for me.

I had 100% wgdc's only netting me 19.5psi max on a 2 liter vf39 combo. Now 70% wgdc is hitting 20psi in first gear and targeted 22psi @ 4150 in second. Once boost onset occurs, watch that needle swing! No boost hunting or any issues of the sort, even with aggressive turbo dynamics maps.

...and if you drill out the mounting tab a bit and reuse the factory isolator grommet, it's just as quiet as oem.

Good times...

later, x
who tuned your car?
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Old 02-28-2007, 12:22 AM   #183
KAX
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Quote:
Originally Posted by B16A2NR View Post
How long did it take to recieve your solenoid and pigtail from Rockauto? I purchased mine Feb21st and it still says "awaiting shipment"
id say about a week, + or - a day (business days of course)
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Old 02-28-2007, 07:56 AM   #184
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Quote:
Originally Posted by 06rexwagon View Post
who tuned your car?
Me, with Streetuner.

later, x
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Old 03-13-2007, 11:07 PM   #185
TheDaneTrain
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Default XPT stage 2 map

Has anyone run the XPT 2002 stage 2 + GM solenoid map?

http://www.plasmatize.com/xptstore/i...products_id=12
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Old 03-14-2007, 02:55 AM   #186
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Quote:
Originally Posted by TheDaneTrain View Post
Has anyone run the XPT 2002 stage 2 + GM solenoid map?

http://www.plasmatize.com/xptstore/i...products_id=12

I just ordered it for my 2003... have the map but haven't got the solenoid installed yet. Will post with results.

From what I've seen, there's no real need to put the resistor in, right? Stock ECU is ok dealing with the GM solenoid's lower resistance?
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Old 03-14-2007, 10:48 PM   #187
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No you do not need a resistor at all. Most of us here running the GM BCS have no resistor installed.
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Old 03-15-2007, 04:08 AM   #188
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Quote:
Originally Posted by blkscooby View Post
No you do not need a resistor at all. Most of us here running the GM BCS have no resistor installed.


Outstanding, thanks! Just finished installing the GM BCS (somebody slap me for deciding it would be 'easier' not to take the IC out - those vac lines onto the WG and compressor nozzle are NOT fun to get to!)

Going to go flash the XPT Stage 2 w/ GM BCS map and see how she drives!
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Old 03-15-2007, 08:51 AM   #189
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Quote:
Originally Posted by 0db View Post
Outstanding, thanks! Just finished installing the GM BCS (somebody slap me for deciding it would be 'easier' not to take the IC out - those vac lines onto the WG and compressor nozzle are NOT fun to get to!)
Unless you have a larger TMIC, there is no need to remove the IC to change the lines. If you have a larger TMIC, I can see why it might be an issue.
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Old 03-15-2007, 10:58 AM   #190
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Quote:
Originally Posted by blkscooby View Post
Unless you have a larger TMIC, there is no need to remove the IC to change the lines. If you have a larger TMIC, I can see why it might be an issue.


ebay tmic - front corner is RIGHT on top of the lines!

all the better for enhanced heat soak at stop lights!
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Old 03-15-2007, 09:13 PM   #191
Dr freedom
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Had my tuner put the solinoid in last week.
Stock controller was running at 95% all of the time, GM one is around 70% .. boost feels a little more stable & than previous now. Hits the target of 21psi with ease.
The stock restrictor is still in place though on the line.
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Old 03-15-2007, 11:18 PM   #192
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You do not need the resistor. But if you are happy with the tune, then leave it. You should be able to run even lower WGDC if the resistor were not installed.
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Old 03-28-2007, 03:15 AM   #193
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hmm .. might have a little play around then. Should I expect surging or something like that upon initially removing it?
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Old 03-29-2007, 02:45 PM   #194
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So I went to order the soleniod and the pigtail from rock auto and they said that it won't ship until the 13th of april. Does anyone know where I can get it sooner?
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Old 03-29-2007, 03:02 PM   #195
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Your local GM dealer should be able to get it within a day or 2, but they're around $28 for the solenoid.
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Old 03-29-2007, 06:45 PM   #196
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a smaller boost pill size (if you are using the stock bcs) will also allow you to run lower wdc numbers if they are maxed out without switching to the gm unit (but go too small and you risk overboosting).
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Old 04-05-2007, 06:07 PM   #197
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ok i read the thread and i dont think this was covered. with the xpt stage 2 and the GM boost control solenoid, is the xpt map tuned for the solenoid?
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Old 04-05-2007, 06:12 PM   #198
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there are 2 maps available

XPT Stage 2 - 2002 WRX $52
http://www.plasmatize.com/xptstore/i...&products_id=4

XPT Stage 2 - 2002 WRX w/ GM BCS $77
http://www.plasmatize.com/xptstore/i...products_id=12
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Old 04-06-2007, 03:57 PM   #199
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Quote:
Originally Posted by cbarth3 View Post
there are 2 maps available

XPT Stage 2 - 2002 WRX $52
http://www.plasmatize.com/xptstore/i...&products_id=4

XPT Stage 2 - 2002 WRX w/ GM BCS $77
http://www.plasmatize.com/xptstore/i...products_id=12
i wasnt sure if those maps were different or not. take it they are though.
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Old 04-22-2007, 08:56 AM   #200
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great writeup
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