Burba88 Posted January 27, 2013 Share Posted January 27, 2013 I just recently put a vf52 turbo on my lgt along with a full catless exhaust and during tuning my target boost was only suppose to be 15psi and it goes to 22+ psi! All of my ebcs lines are correct and my wastegate opens and shuts hooking a air hose to the line. I have been doing se research online and its seeming my problem is the wastegate port needs to be ported. I'm just wondering what you all think and if it could possibly be anything else. I'm tempted to just buy a GS EWG and be done with the issue. KMT Tuned Link to comment Share on other sites More sharing options...
Spec B Posted January 27, 2013 Share Posted January 27, 2013 Have you zerod out target boost and WGDC tables on your map? Do that and try again..you will quickly know if the issue is mechanical or tune related. Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 AFAIK, there's no reason you should be getting boost creep with a VF52 and catless downpipe. How to test for boost creep: Hook up line directly from compressor to turbo. You should only be running wastegate boost at this point, purely mechanical/hardware working here. Not even your BCS is involved anymore. Do a log. If your boost keeps going up as RPMs climb up, then you have a boost creep problem. edit: Or you could just 0 it out like SpecB suggested or 0 out the "Max WGDC Cumulative" value. But this would still depend on your BCS. Either way would work. The point is you want to have your WG opening as much as possible to see what is the *minimum* amount of boost you're capable of running. Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 yup the WGDC is set to 0% and i have also tried the turbo compressor hose right to the WG and still boost way to much. I'm basically stumped at this point. KMT Tuned Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 What downpipe do you have? Is it an Invidia? Also, what pill are you using? Are you sure you only have 1 pill in there? Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 yes its a invidia with a divorced WG, im not using any pill, but i did try using the pill and it still made no difference. KMT Tuned Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 Your WG door may be hitting the divorcing plate in the DP. You have to grind it down. http://legacygt.com/forums/showthread.php/question-invidia-dp-85295p2.html?t=85295&page=2 http://legacygt.com/forums/showthread.php/invidia-down-pipe-install-118156p2.html?highlight=invidia Link to comment Share on other sites More sharing options...
fahr_side Posted January 27, 2013 Share Posted January 27, 2013 Invar asks this because the early version of the Invidia downpipe has a divider that prevents the wastegate flapper from opening fully. You need to pull the downpipe and cut the divider back. 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...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 Might not even be just the early versions. Seems to be hit or miss in those threads. I believe mine is a V2, but I still had the problem. Some people even with the V3. Someone suggested it might be slight variations in the tolerances of the DP and also the turbo itself, including the WG doors. Definitey worth looking at. Grind it down even if you don't see a mark. Can't hurt to shorten it a tiny bit. Link to comment Share on other sites More sharing options...
doctorbrody Posted January 27, 2013 Share Posted January 27, 2013 Also your stock heat shield can prevent the wastegate actuator from operating properly Link to comment Share on other sites More sharing options...
fahr_side Posted January 27, 2013 Share Posted January 27, 2013 Might not even be just the early versions. Seems to be hit or miss in those threads. I believe mine is a V2, but I still had the problem. Some people even with the V3. Someone suggested it might be slight variations in the tolerances of the DP and also the turbo itself, including the WG doors. Yeah. There are a lot of different exhaust housing designs out there so it would be hard for Invidia to test with all of them. Mine is a v2 but I still had to chop the divider to fix this. 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...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 i have the newer version of the invidia DP the divider sits back a bit. i have no heatshield on at the moment, I have been told to possibly try putting the stock intake back on. so i guess thats one more thing i will try to do today KMT Tuned Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 intake wouldn't do that. grind the divider anyway. look at the threads and the pictures. look at how low my divider was (page 2 on one of the threads) and it still hit it and caused me to hit fuel cut and throw a CEL. Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 hmmmmm that style is alot different mine never stuck out at all. and i unbolted the WG and i could move it all the way open. KMT Tuned Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 Hrm, that's surprising. How is it different? Maybe Invidia changed something big time... If you're able to move the WG with the actuator disconnected, then I guess that's not it. What the heck... Disconnect the WG actuator, effectively leaving your WG door to swing freely and do a pull. This will tell you for sure if it's creep. Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 So your saying open the port all the way to basically I wouldn't be able to make boost ? And if I'm still boosting then its Defiently creep where I would have to port it or just get a ewg KMT Tuned Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 Yeah.... Well, if you're still making appreciable boost with the actuator disconnected, something's not right. Any chance the actuator is too stiff somehow? Bent arm, etc.? Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 No we checked it out we tested it hooked a airline up to it and it opens and closes as it should KMT Tuned Link to comment Share on other sites More sharing options...
iNVAR Posted January 27, 2013 Share Posted January 27, 2013 Check this thread out: http://legacygt.com/forums/showthread.php/vf52-major-boost-creeeeeep-120458.html Maybe you do just have creep after all. Link to comment Share on other sites More sharing options...
DeltaNu1142 Posted January 27, 2013 Share Posted January 27, 2013 Guys, I've got the same trouble. VF52 with MadDad Metal V2 DP. I just pulled the DP to see if I had any interference; I don't see any, do you? http://i.imgur.com/eAHqZgQ.jpg http://i.imgur.com/TgMUOo5.jpg I'm going to go check that the WG opens all the way using an air compressor... that's a good tip, Burba. Tits mcgee Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 Yeah this is the most frustrating thing ever. I'm half tempted to say f*ck it dont worry about getting it ported and just go big and get a Ewg, yeah it's a good way to find out if your WG is opening an closing KMT Tuned Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 And your dp looks fine KMT Tuned Link to comment Share on other sites More sharing options...
DeltaNu1142 Posted January 27, 2013 Share Posted January 27, 2013 Agreed. I just hooked up my air compressor to the IWG actuator... have a look. I believe this is the WG fully open, but I need verification. Is this full open? ALSO... found this, which has to be contributing to my boost creep problem: http://i.imgur.com/R4uT5TP.jpg I already disconnected both ends, but the short line in the background going to the turbo with the restrictor pill in it is torn & was barely hooked up. I'm pretty much done with VSR Motorsports in Tampa. This isn't the first time I've had to go in & clean up after them, but it will be the last. Tits mcgee Link to comment Share on other sites More sharing options...
Burba88 Posted January 27, 2013 Author Share Posted January 27, 2013 That's all the further mine opens so I'm assuming yea that's fully open unless someone else can chime in an say otherwise. And I'm assuming that is where your boost creep is coming from, how bad is your creep. I'm calling a guy tomorrow and seeing how much he will charge for porting the WG KMT Tuned Link to comment Share on other sites More sharing options...
DeltaNu1142 Posted January 27, 2013 Share Posted January 27, 2013 Well... here's a log. I got a MAP sensor HIGH CEL (you'll see IAM drop) followed quickly by an overboost CEL.romraiderlog_20130119_081640.csv Tits mcgee Link to comment Share on other sites More sharing options...
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