Shifty93 Posted July 3, 2008 Share Posted July 3, 2008 I decided to put my downpipe on today and try out Stage2... I've had everything for a while, but I was being lazy about putting them on... Here's the deal, I'm having a light tapping nosie through the downpipe, but only when I'm completely off the throttle and it makes noise sometimes at idle... It's not a motor tap or anything, it actually sounds like something is inside the pipe rattling, but I've done everything short of pulling it back off which I'll be doing in the next few hours...lol... Any ideas??? I saw the other thread but this sounds a bit different from his problems, but I am overboosting too...lol... I put the car on Economy and my over boost problems are gone but the car is piss slow... I've tried switching my OTS maps, but my AP is saying 18lbs within a few seconds of me flooring it... I only have an AVO drop in filter, the catless downpipe, and an AP with OTS tunes... Should I try messing with the pill size??? Link to comment Share on other sites More sharing options...
Shifty93 Posted July 4, 2008 Author Share Posted July 4, 2008 ??? Link to comment Share on other sites More sharing options...
johnboi85 Posted July 6, 2008 Share Posted July 6, 2008 i think i have the same noise you do. although its not giving me any problems. i have no exhaust leaks. i am not overboosting though. i just got used to the noise. Link to comment Share on other sites More sharing options...
sschmelcke Posted July 6, 2008 Share Posted July 6, 2008 sounds to me like the same exact problem korpsepatrol was having. send him a pm. he had to grind down some of the wastegate side of the pipe. Link to comment Share on other sites More sharing options...
Shifty93 Posted July 7, 2008 Author Share Posted July 7, 2008 Yea, I hit the center divider lightly with a grinder, and now it's good to go... Now, the important question... Anybody know where I can get a stock restrictor pill??? Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 7, 2008 Share Posted July 7, 2008 shifty glad to see it worked out for ya. It sucks when i found out what the hell was causing. And for restrictor pill you might be able to mike at tuning alliance, he either might have one or will probably guide you to the right place for one. 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
Legacy_GT_Pilot Posted July 11, 2008 Share Posted July 11, 2008 I've had that exact same sound for the last 6 months and it's been driving me absolutely nuts. A light rattle at cold idle and a light rattle while decelerating. I've had the exhaust off several times and re-tightened everything, cut back the heat shields all to no avail. Now I guess I have a project this weekend to grind down the centre divider on my DP. Hopefully this works! Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 14, 2008 Share Posted July 14, 2008 I would not be surprised if it is the cause. Why did this happen with ours is what i would like to know. 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
Legacy_GT_Pilot Posted July 14, 2008 Share Posted July 14, 2008 The engine rattle I had is now gone. One more gremlin to deal with in my exhaust and then I'll be happy. Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 14, 2008 Share Posted July 14, 2008 So the grinding fixed it? 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
Legacy_GT_Pilot Posted July 14, 2008 Share Posted July 14, 2008 Yup - the grinding fixed the rattle I could hear in the engine bay. Thanks. Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 14, 2008 Share Posted July 14, 2008 excellent. The other rattle i was having was under the body of the car you should check your heat shields that are under your tranny they could be rubbing on a one of the exhaust pipes. 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
jasone Posted July 15, 2008 Share Posted July 15, 2008 I'm having the same problem (as korpsepatrol already knows) and I'm going to get in touch with Invidia about this. I'll probably be fixing it either tomorrow or Wednesday, but I'm still going to talk to them about it because this is kind of a big deal as far as QA is concerned. Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 15, 2008 Share Posted July 15, 2008 Hell if you can manage to get us new dp's i am ALLL for it. Let me know i think there are like atleast 5 others that have pm'ed me about this. Especially considering i want to install this vf39 that is sitting in my living room. 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
LazyDog Posted July 15, 2008 Share Posted July 15, 2008 FYI... i have the invidia divorced wastegate downpipe w/o a rattle Link to comment Share on other sites More sharing options...
Long Island Legacy Posted July 16, 2008 Share Posted July 16, 2008 did you take your exhaust heat shields off when you installed your DP? Link to comment Share on other sites More sharing options...
LazyDog Posted July 16, 2008 Share Posted July 16, 2008 oddly enough, i whitetiger discovered during the install that half of my exhaust heat shield was ripped off??? so he didn't put the remaining half back on is that what rattles??? Link to comment Share on other sites More sharing options...
Legacy_GT_Pilot Posted July 16, 2008 Share Posted July 16, 2008 I did not remove mine. When I do a visual check with the car on ramps and the engine off, everything looks fine and clearance doesn't seem to be an issue, but who knows under load. Has anyone else removed their exhaust heat shields? I might give this a try. did you take your exhaust heat shields off when you installed your DP? Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 16, 2008 Share Posted July 16, 2008 As far as the head shields go, i have a cobb heat shield and it has never caused a rattle just put on all the 4 bolts and you should be A ok as far as that goes. lazy dog that is not the rattle we are talking about just look at my old invidia dp problem thread it explains the issue. 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
Soda Popinski Posted July 26, 2008 Share Posted July 26, 2008 Just how far do you have to grind down that splitter? I just finished installing my turboback that included an invidia high flow cat with divorced wastegate and I get the exact same sound you had. But the question is, how much and how far do you grind off? Do you grind the top part towards the hood? Or the bottom towards the ground, or the front? Or the entire thing? Please let me know, I just finished a very expensive upgrade install and now the sound kinda makes the car sound ghetto with the rattle... I'd like to fix it ASAP. thanks! Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 26, 2008 Share Posted July 26, 2008 http://www.legacygt.com/forums/showpost.php?p=1833445&postcount=18 That picture shows the best description. Thats how i did it the first time and its about a half an inch but then i re did it to smooth it out and made it a very sharp edge in order to not cause any turbulence(prob not important but i wanted it too look nice). 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
Soda Popinski Posted July 28, 2008 Share Posted July 28, 2008 I'd like to vouch that simpy getting a dremel tool and a metal grinding wheel for the dremel (I went through 2 1" wheels) fixed the problem. Cut a half -football shape ( into the I beam part of the divorced wall, starting about 1/2" from the top to 1/2" from the bottom... make sure it's atleast 1/4" deep, and the sides aren't burred... WORKED LIKE A CHARM. bonus: it solved the overboost problems I had. A+ korpsepatrol for the pictures. Link to comment Share on other sites More sharing options...
SBT Posted July 28, 2008 Share Posted July 28, 2008 It looks like the gouge you have to take out of the splitter would allow some spillage into the turbo outlet. Doesn't this impact the advantage of having a DWG or is the turbulence that this creates really that negligible? - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
korpsepatrol Posted July 28, 2008 Share Posted July 28, 2008 It looks like the gouge you have to take out of the splitter would allow some spillage into the turbo outlet. Doesn't this impact the advantage of having a DWG or is the turbulence that this creates really that negligible? The turbulence might not even matter but just for peace of mind i made it nice and smooth. After having logged and tuned a bit though, it seems like the dp does do its job in efficiently since my tuner said it was causing extra boost(not over boost). It sucks that such a great looking piece had a defect like that and I had to be the first to find it since it made me freak out for about a few weeks. 2008 6mt Legacy Gt Spec B DGM - Not so Stock/Work in progress 2006 5mt Legacy Gt OBP - Sold 2005 5eat Legacy Gt OBP - RIP R.I.P Coxx Link to comment Share on other sites More sharing options...
SBT Posted July 28, 2008 Share Posted July 28, 2008 The turbulence might not even matter but just for peace of mind i made it nice and smooth. After having logged and tuned a bit though, it seems like the dp does do its job in efficiently since my tuner said it was causing extra boost(not over boost). It sucks that such a great looking piece had a defect like that and I had to be the first to find it since it made me freak out for about a few weeks. I was thinking of the turbulence of the escaping WG gases into the turbo outlet stream due to the gap (where you gouged it to clearance the WG) between the face of the turbo and the end of the DWG splitter. Was the splitter a tight/snug fit against the turbo outlet face or not before the gouging? So other than the WG issues with the Invidia DWG splitter, you're still not happy with the Invidia DP because it's causing "extra boost" ?? How much extra boost are you seeing and can this be tuned for? - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
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