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05-12-2021, 12:21 PM | #1 |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
AccessPort Noob - EWG - Boost Setup
Hey guys,
Here's the situation: Bought my late grandpa's '07 STi (yeah, he's a badass) with the following mods: GoFastBits BOV Perrin Turbo Inlet APS 70mm Intake 4 Port Boost Solenoid (not sure what brand) Upgraded Fuel Rails w/braided AN lines ID1000s Invidia Catted DP Cobb Lightweight Crank Pully GrimmSpeed AOS (Upgrading to Crawford Catch Can) SnowPerformance/Lebonte Meth Injection System Blouch Dom 3.0R Stock Top Mount IC AccessPort v2 I'm running 93 right now. The Meth is not currently running and I'm having some overboost issues (spiking at about +26psi at WOT). I'm a pretty conservative driver, so I've only had the issue a couple of times and try to stay out of the boost. I have everything for my EWG setup with hopes of controlling boost correctly, and I know that I'll need a tune after the install. I'm mostly concerned about what springs to run in the TiAL MV-S 38MM in preparation for my new tune. I was assuming I should initially try to match the target boost the car is currently tuned at as it runs pretty well with the exception of the overboost, but I don't even know where to start to find that out. I have no idea how to even remotely start this endeavor. Thoughts? -GAMETIME
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05-12-2021, 03:03 PM | #2 |
Scooby Specialist
Member#: 469585
Join Date: Jun 2017
Chapter/Region:
W. Canada
Vehicle:2009 STi White |
Dude, that setup is a disaster waiting to happen.
Usually a 1 BAR spring will do the trick, but this is a question for your tuner as well as what plumbing setup he wants on the gate. Please do stay out of it until you get a it calibrated and the meth running. Running the Dom 3.0R on a factory TMIC without E or Meth is insanity. I would honestly thing about going down to a Dom 1.5 if its a street car, It'll be much more enjoyable, that Dom 3.0R is probably a dog under 5000 RPM. |
05-12-2021, 03:21 PM | #3 |
Scooby Specialist
Member#: 395275
Join Date: Jul 2014
Chapter/Region:
RMIC
Location: Fort Lupton, CO
Vehicle:2012 STi SWP |
Ask your tuner about the EWG. The first tuner i had wanted a 1 bar, and my current tuner wanted at .8 bar
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05-12-2021, 03:23 PM | #4 | ||
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
Yeah, I've kept an eye on the AFR and IAT but I don't push the car at all.
Quote:
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I should also note that gramps did have his aggressive setup pushing 26psi with meth on the stock intercooler for a decent 1/4mile in Colorado elevation. Last edited by GAMETIME2121; 05-12-2021 at 03:32 PM. |
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05-12-2021, 03:28 PM | #5 |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
The consensus is to ask my tuner about what spring to run, but I'm more interested in figuring out what boost my current tune is set for.
Do I need AccessTuner software or something to see what my current set up is? |
05-12-2021, 03:35 PM | #6 |
Scooby Specialist
Member#: 395275
Join Date: Jul 2014
Chapter/Region:
RMIC
Location: Fort Lupton, CO
Vehicle:2012 STi SWP |
ah you're here in Colorado?
You'd really need to see the tune to know what the boost is set at. Even if you had Accesstuner race, you may not be able to open the tune. Most tuners "lock" the tune from being accessed to protect their IP. |
05-12-2021, 03:43 PM | #7 | |
Scooby Specialist
Member#: 469585
Join Date: Jun 2017
Chapter/Region:
W. Canada
Vehicle:2009 STi White |
Quote:
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05-12-2021, 03:45 PM | #8 | |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
Quote:
Also, I was afraid that I wouldn't be able to figure out what tune the car is currently running. |
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05-12-2021, 03:46 PM | #9 |
Scooby Specialist
Member#: 395275
Join Date: Jul 2014
Chapter/Region:
RMIC
Location: Fort Lupton, CO
Vehicle:2012 STi SWP |
you may be able to see "target boost" with the Accessport IIRC.
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05-12-2021, 03:48 PM | #10 | |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
Quote:
I'm worried that he was running a 18psi tune or something mildly conservative and the Internal wastegate/boost solenoid isn't functioning correctly. |
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05-12-2021, 03:50 PM | #11 |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
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05-12-2021, 03:56 PM | #12 |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
I should also note that the 2 times it did overboost, the fuel cut, CEL came on, and I got a P0244 IIRC code. So I feel like the tune isn't asking for gobs of boost as it sits.
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05-12-2021, 04:12 PM | #13 | |
Scooby Specialist
Member#: 469585
Join Date: Jun 2017
Chapter/Region:
W. Canada
Vehicle:2009 STi White |
Quote:
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05-12-2021, 06:27 PM | #14 |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
So anyone have a quick how-to for viewing the map currently installed? I hooked up my AccessPort to the car and it shows "Grandpa's name - 91 tune" under View Current Map, but doesn't give me any further info. I do know that he did utilize some open source tuning when he first got the car, but I wouldn't be surprised if he fine tuned his own map, as he's a pretty avid mechanic.
Does AccessManager let me download and view current tunes? |
05-12-2021, 10:55 PM | #15 | |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
Quote:
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05-13-2021, 12:06 AM | #16 | |
Scooby Newbie
Member#: 520650
Join Date: Dec 2020
Vehicle:2007 Impreza WRX STi Satin White Pearl |
Quote:
I think the gameplan is to throw a 1 bar spring in the wastegate, bolt it all up, and get a brand new tune with some meth protection. I'll be gentle in the meantime. Thanks for your help, guys! |
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06-02-2021, 04:59 PM | #17 |
Scooby Newbie
Member#: 340328
Join Date: Dec 2012
Location: Columbus, OH
Vehicle:04 WRX WRB |
A general rule of thumb for spring size is "target boost x 0.5". So if boost target is 20 psi, a 10psi spring is usually a good starting point. The CL boost control system is then tuned to achieve the desired pressure by either bleeding off or interrupting the pressure signal to the wastegate.
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