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Old 07-21-2008, 03:09 PM   #351
Superorb
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Quote:
Originally Posted by shipjumper View Post
well, I will be installing a DP and STi TMIC... turning the boost up to a whopping 13-14psi...

I will be using romraider and ecuflash...

THEN will this mod be useful?
Not really. The Gm BCS is best to spool quicker and hold higher boost to redline. You will also suffer from a stock up pipe which will limit spool no matter what boost solenoid you're using. STi TMIC is also pointless unless you have a bigger turbo feeding it.

If you want some more power, do the regular stage 2 upgrade:

up pipe, dp, air filter. No need for GM BCS or larger TMIC
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Old 07-21-2008, 03:26 PM   #352
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yeah I will be gutting my Uppipe... at the same time....
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Old 07-21-2008, 06:49 PM   #353
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STi TMIC is also pointless unless you have a bigger turbo feeding it.
"pointless?"
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Old 07-22-2008, 09:24 AM   #354
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"pointless?"
Have anyhting you'd like to add?
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Old 07-24-2008, 06:59 PM   #355
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If I wanted to run wastegate boost on my MHI 18g with the GMbcs installed, what would i need to do?

Thanks
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Old 07-24-2008, 08:31 PM   #356
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If I wanted to run wastegate boost on my MHI 18g with the GMbcs installed, what would i need to do?

Thanks
May I ask why?
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Old 07-24-2008, 08:49 PM   #357
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If I wanted to run wastegate boost on my MHI 18g with the GMbcs installed, what would i need to do?

Thanks
Depends on how you have it plumbed, but you would change your wastegate duty tables to zero and make sure the line going to the wastegate is the straight through port and when the the table is set to zero it will not divert air from the wastegate and run wastegate pressure.

Or you could just get a piece of vacuum line and run it straight from the compressor nipple to the wastegate.

-Rene
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Old 07-24-2008, 09:20 PM   #358
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I am running an accessport and I need to drive to get my car tuned properly. I am wanting to run wastegate boost so its safer as the gmbcs changes the specs.

So I could just connect the line from the compressor near where the silicone coupler goes to the wga one?

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Old 07-24-2008, 09:28 PM   #359
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Connect those two nipples, that way the WG isn't manipulated by the BCS. It will open at whatever the WG spring is.
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Old 07-24-2008, 09:38 PM   #360
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The gmbcs will be fine to be connected into the harness but not used, correct?
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Old 07-24-2008, 11:45 PM   #361
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Quote:
Originally Posted by 007WRX View Post
The gmbcs will be fine to be connected into the harness but not used, correct?
You are going to want to cap the nipple on the inlet so it is not sucking in unmetered air on the trip to the tuner:


The one to the right of the 'S' on the SPT coupler

-Rene
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Old 07-24-2008, 11:55 PM   #362
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Excellent. Will do.

Thanks a lot for all the help guys.

Fast easy solutions. keep it up!
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Old 07-28-2008, 08:11 PM   #363
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So i installed it into the harness and connect the line from the wga to the compressor on the turbo, and i cant get more than 4 psi before it starts bogging.

Any ideas?

The lines from the gmbcs to the wastegate and compressor are un connected. Again, i want to run wastegate boost.
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Old 07-28-2008, 09:13 PM   #364
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Quote:
Originally Posted by 007WRX View Post
So i installed it into the harness and connect the line from the wga to the compressor on the turbo, and i cant get more than 4 psi before it starts bogging.

Any ideas?

The lines from the gmbcs to the wastegate and compressor are un connected. Again, i want to run wastegate boost.
so are you saying you are running a line directly from the compressor to the wastegate? or are you running from the compressor to the gmbcs and then to the wastegate? if you are running direct what line did you use to connect the two.

with a 18g on wastegate boost you should be in the 9-15psi range.

-Rene
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Old 08-06-2008, 05:28 AM   #365
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Quote:
Originally Posted by 007WRX View Post
I am running an accessport and I need to drive to get my car tuned properly. I am wanting to run wastegate boost so its safer as the gmbcs changes the specs.

So I could just connect the line from the compressor near where the silicone coupler goes to the wga one?

SO I'm really confused I have a DB20G and of course the stock vacuum lines are 4mm and the new turbo vacuum nipples are 5/32"??

What should I do??

I also have the perrin EBC.

Again I'm in the same senario as 007 I will be running the for a week or two to break in the new turbo and also before I can get in for a protune.

SO should I just run a bigger hose?

Should I run my EBC?

And also what about the pill restrictor?

I'm a real visual learner so if some one has a picture of there set up and how I should run it till I get it tuned.....that would be super help full I just don't want to end up popping my engine.

thanks
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Old 08-06-2008, 10:21 AM   #366
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Originally Posted by dasnowman View Post
SO I'm really confused I have a DB20G and of course the stock vacuum lines are 4mm and the new turbo vacuum nipples are 5/32"??

What should I do??
run 5/32" lines

I also have the perrin EBC.

Again I'm in the same senario as 007 I will be running the for a week or two to break in the new turbo and also before I can get in for a protune.
run a line directly from the compressor to the wastegate

SO should I just run a bigger hose?
yes

Should I run my EBC?
bring hose to hook it up the day of your tune

And also what about the pill restrictor?
the perrin is a 3 port so you will no longer need the pill

I'm a real visual learner so if some one has a picture of there set up and how I should run it till I get it tuned.....that would be super help full I just don't want to end up popping my engine.

thanks
-Rene
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Old 08-06-2008, 01:07 PM   #367
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-Rene
thanks marlon
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Old 08-25-2008, 12:56 PM   #368
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Im sure its somewhere in the first 15 pages, but just to make sure...on the wiring of the BCS, it doesn't matter which wire is tapped into which right?
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Old 08-29-2008, 06:58 PM   #369
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They say it shouldn't but I first did the yellow to the "B" then the black to the "A" on the harness and my car was going crazy. So I swtiched it around it ended up working perfectly.

I did, Yellow - A, Black - B
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Old 08-29-2008, 10:57 PM   #370
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well the STi TMIC is on, but now the car feels more "flutterly" (?)... I really dont know why... on boost, it shows a psi higher...

I am wondering is a MBC or EBC will help, once I do a romraider tune, im sure this will smooth out, but the GM BCS.. its still on my mind like it will help because of its more comple nature than the subaru OEM one...
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Old 08-30-2008, 06:57 PM   #371
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Quote:
Originally Posted by shipjumper View Post
well the STi TMIC is on, but now the car feels more "flutterly" (?)... I really dont know why... on boost, it shows a psi higher...

I am wondering is a MBC or EBC will help, once I do a romraider tune, im sure this will smooth out, but the GM BCS.. its still on my mind like it will help because of its more comple nature than the subaru OEM one...
You can't just throw a larger tmic on the car and expect it to run fine. You need to tune accordingly for the larger top mount.
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Old 08-31-2008, 09:37 AM   #372
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ok, well, I guess I will get in there with the rom raider...

I thought it wasnt neccasary with just a larger TMIC, but now I know...

sooo, does the GM BCS work better all by itsself, or only with ecutech? not neccassary with rom raider?
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Old 08-31-2008, 12:13 PM   #373
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Usually people that do the BCS mod have many other mods as well and don't only run the GM BCS alone. Do you have any other mods?
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Old 08-31-2008, 05:49 PM   #374
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no, but I do see the boost PSI move around alot at WOT... plus I like planning ahead and would do it first to suport later mods... $ and easy first...
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Old 08-31-2008, 06:34 PM   #375
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So your car is completely stock?
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