fahr_side Posted February 2, 2016 Share Posted February 2, 2016 It's largely a problem of resonance in the fuel lines on the GRB. They've tried to fix this via the EL comp tables but they can be improved on. The fuel lines on the plastic manifolds have far fewer vices. Sent from a device using some software. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
GTEASER Posted February 2, 2016 Share Posted February 2, 2016 http://www.iwsti.com/forums/showthread.php?t=254372 Fuel Line Extension / Stumble Fix Mod GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
ebo03 Posted February 2, 2016 Share Posted February 2, 2016 Good to know it isn't just me. There is definitely a stumble before power kicks in hard on my car. What is GTEASER going to do about it? Link to comment Share on other sites More sharing options...
GTEASER Posted February 2, 2016 Share Posted February 2, 2016 One of the tuners near me has tried every single possible hardware and tuning table fix, and the one he has had the most success with is the fuel line mod to change the resonance from the stock dampers/regulator. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jackal8788 Posted February 2, 2016 Author Share Posted February 2, 2016 Okay well I'm glad this isn't some other unique issue that only my car experiences. Does it happen at WOT as well or is it just in mid-throttle ranges? Is it dangerous to the engine or just a nuisance? VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
GTEASER Posted February 2, 2016 Share Posted February 2, 2016 Nuisance. Not WOT, just small throttle inputs, or balanced throttle at 2600-3400 rpms. It's not a lean condition, the injectors are just affected by the pulsing frequency of the fuel pump or pressure regulator. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jackal8788 Posted February 2, 2016 Author Share Posted February 2, 2016 I feel much better now. As it just re-occurred to me, could I get that thread title change Mr. Teaser? 'Jackal's 20g to 18g e85 Soap Opera' VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
GTEASER Posted February 2, 2016 Share Posted February 2, 2016 When I get back to the office. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
ebo03 Posted February 2, 2016 Share Posted February 2, 2016 Nuisance. Not WOT, just small throttle inputs, or balanced throttle at 2600-3400 rpms. It's not a lean condition, the injectors are just affected by the pulsing frequency of the fuel pump or pressure regulator. Yep that sounds like what I experience. Link to comment Share on other sites More sharing options...
GTEASER Posted February 2, 2016 Share Posted February 2, 2016 As it just re-occurred to me, could I get that thread title change Mr. Teaser? 'Jackal's 20g to 18g e85 Soap Opera' Done! GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jackal8788 Posted February 2, 2016 Author Share Posted February 2, 2016 Done! 'tis a thing of beauty and probably provides much more insight into what any future readers are getting themselves into VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
jackal8788 Posted February 2, 2016 Author Share Posted February 2, 2016 So as part of my attempt to be as proactive as possible and not have any problems when I get things put together, I decided to verify the cracking pressure of the wastegate. I applied pressure at one of the three 'low' ports which are all pressure ports and found that it cracks at about 22 PSI. I have springs installed for a 14.5 PSI crack. Obviously there is additional opening force on the valve generated from exhaust pressure which I can't simulate in a static test. Does anyone know if this is about right for a static cracking pressure? fahr_side, this is probably most directed at you. Sent from my iPhone using Tapatalk VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
BBPeik Posted February 3, 2016 Share Posted February 3, 2016 fahr_side, this is probably most directed at you. Sent from my iPhone using Tapatalk Ya think My someday I will be done with it thread. Link to comment Share on other sites More sharing options...
fahr_side Posted February 3, 2016 Share Posted February 3, 2016 Sounds a bit high to me. Sent from a device using some software. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
jackal8788 Posted February 3, 2016 Author Share Posted February 3, 2016 I will get in touch with TiAL and try to verify. VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
jackal8788 Posted February 3, 2016 Author Share Posted February 3, 2016 Yet another piece of my puzzle fell into place yesterday with the arrival of this fine piece. After discussion with fahr_side, I've decided to tack weld the flapper door as opposed to using a bracket. That said, I'm wondering the best place to do this. I know I can obviously tack the door itself but I'm wondering if tacking the actuator arm instead might be a little easier to 'undo' if I ever sell the turbo to someone who doesn't want EWG. Thoughts? VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
FLlegacy Posted February 3, 2016 Share Posted February 3, 2016 I think the flapper is the way to go, it's just a cover so to speak. The arm relies on movement to work. Sent from my SAMSUNG-SGH-I337 using Tapatalk Link to comment Share on other sites More sharing options...
fahr_side Posted February 3, 2016 Share Posted February 3, 2016 The flapper is much easier to undo! Sent from a device using some software. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
BBPeik Posted February 3, 2016 Share Posted February 3, 2016 I know this is a silly question. On a ewg setup like that is the wg actuator in the dp? Are you saying you want to weld the door open? Sorry just a bit confused on the whole ewg thing. My someday I will be done with it thread. Link to comment Share on other sites More sharing options...
FJuan Posted February 3, 2016 Share Posted February 3, 2016 He's talking about welding it closed so he can used an external waste gate on the DP. My wife's balls are delicious. Link to comment Share on other sites More sharing options...
ebo03 Posted February 3, 2016 Share Posted February 3, 2016 I know this is a silly question. On a ewg setup like that is the wg actuator in the dp? Are you saying you want to weld the door open? Sorry just a bit confused on the whole ewg thing. He's talking about welding it closed so he can used an external waste gate on the DP. I think there is some confusion about how an EWG functions. It has nothing to do with a downpipe. Link to comment Share on other sites More sharing options...
jackal8788 Posted February 3, 2016 Author Share Posted February 3, 2016 I know this is a silly question. On a ewg setup like that is the wg actuator in the dp? Are you saying you want to weld the door open? Sorry just a bit confused on the whole ewg thing. I want to weld my internal wastegate door/flapper closed so no exhaust leaks by the turbine. The new EWG is going to be located at the collector of the header just before the entrance into the turbo hotside. VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
Shadow_419 Posted February 3, 2016 Share Posted February 3, 2016 Well it's about getting the exhaust gas to bypass the turbine and continue along the exhaust track. Kinda related to the downpipe. Link to comment Share on other sites More sharing options...
GTEASER Posted February 3, 2016 Share Posted February 3, 2016 Well it's about getting the exhaust gas to bypass the turbine and continue along the exhaust track. Kinda related to the downpipe. Only if plumbed back in after the turbo, not if it's dumped to the atmosphere. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jackal8788 Posted February 3, 2016 Author Share Posted February 3, 2016 For the time being, I will not be plumbing back into the downpipe. We'll let it dump to atmosphere and see how loud it really is. Sent from my iPhone using Tapatalk VF54 to 20G to VF54 to 18G build thread Link to comment Share on other sites More sharing options...
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