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Old 05-09-2012, 03:22 PM   #1
LTM87
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I've started on making the WGDC map for my04 WRX (Stock turbo with a turbo-back exhaust), and had been shooting for 17 at 3500, tapering off to 13 at redline.

With a primary WGDC of 0 all the way through, I had a max of 9psi on the base pull. Using the Turbo dynamics to increment my tables, I made linear progress up to about 14.5psi, but seemed to have hit a wall there. With the Max WGDC set to 50, or 90, it doesn't matter, it still makes about the same boost. This is a bit confusing, because up to 50 i could see a correlation between the raised mx WGDC and the resulting max boost.

Anyone have an idea of something mechanical that may be awry, or something I'm completely missing? Ive tried upping the Initial off-idle WD, but that does little to nothing to help the issue.

Note: A buddy of mine told me that my restrictor pill may be in backwards... Thinking of how air pressure works, I can't see alot of truth in this, but is there any truth to this as a possibility?
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Old 05-09-2012, 03:33 PM   #2
Nuke209
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put in a 3 port solenoid and give it a shot, you should be able to hit 17 easily
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Old 05-09-2012, 03:46 PM   #3
alexmartynyuk
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i pmd you. tighten your wg arm 2 turns if you havent.
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Old 05-09-2012, 03:50 PM   #4
LTM87
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Got it, and that WG arm shows no intention of ever wanting to turn at all, that bastard is stubborn. And by turns you mean 720 degrees of rotation? I've heard of quarter turns, but not full turns. Maybe i need to get out more...
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Old 05-09-2012, 04:25 PM   #5
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yes 2 full turns. leave your td stock and instead use wgdcmax to set your boost curve.
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Old 05-09-2012, 06:31 PM   #6
LTM87
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2.. even 3 full turns later and the most I'm hitting is a high 14 with a target of 17. Even running 100% WGDC from 2500rpm up. Just pressurized the entire cold side, no leaks to speak of.
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Old 05-09-2012, 07:17 PM   #7
LTM87
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2.. even 3 full turns later and the most I'm hitting is a high 14 with a target of 17. Even running 100% WGDC from 2500rpm up. Just pressurized the entire cold side, no leaks to speak of.
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Old 05-09-2012, 08:00 PM   #8
alexmartynyuk
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it could be your solenoid, you have the restrictor pill in right? back when I had my oem bcs I could hit 18-19psi with the wg arm tightened 2 turns. You turned the actual arm going to the actuator right?
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Old 05-09-2012, 10:17 PM   #9
LTM87
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Yeah, loosened the locker with a 10mil, gave it a total of 3 turns actually (did one turn, did pull, looked at results, repeated). Good news is later today, i was able to hit 15.8 (target 15.9) on a slightly uphill second gear pull. Really though, with 100 WGDC and three turns in the arm, i SHOULD be seeing higher boost (though I'm only shooting for 17 tops).

This probably matters too: The atmospheric pressure where i am varies from 12.62 to 13.06 at the lowest, where i do the pulls.
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Old 05-10-2012, 12:20 AM   #10
alexmartynyuk
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did u remove the c clip off the wg flapper when doing this?
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Old 05-10-2012, 12:30 AM   #11
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you probably did it right but heres how its done: http://www.wrxtuners.com/forums/f70/...ate-arm-18241/
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Old 05-10-2012, 12:38 AM   #12
alexmartynyuk
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another reason you might not hit target boost at your atm. pressure is because of max wastegate duty compensation(atm. pressure), and target boost compensation(atm. pressure) depending on what you set those up to.
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Old 05-10-2012, 12:40 AM   #13
LTM87
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haha I dont know how you would rotate it otherwise! Yeah, every turn, i took that little bastard off, detached, turned 180deg, reattached and re-clipped. As it stands now, Ive turned the end piece 540 degrees.
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Old 05-11-2012, 03:48 PM   #14
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Is prob an atmospheric pressure issue. Set your boost tables to 19.1 psi target and see what you get. Should be about 17 psi. If you are running the stock solenoid you will probably want to decrease you WGDC back doown as well. Will run into PTFB issues at those WGDC levels due to poor boost correction.
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