MarcusDubya77 Posted February 22, 2006 Share Posted February 22, 2006 So I have been hearing a putter from under the car for the longest..today while I was running the car I stuck my hand near my shorty DP, actually on the Exhaust I had made...and sure as shit I could feel air coming from the welds mear the flange....DAMMIT!!!!! Now I know why I might be having a loss of power!!!!!!!!! :woowoo:check out the Diamond Gray Metallic Monster!!! Link to comment Share on other sites More sharing options...
Acil Posted February 22, 2006 Share Posted February 22, 2006 Bummer! Have you considered exhaust tape as a temporary fix to your problem? And wouldn't a loss of pressure in the exhaust actualy create a boost in HP because of less resistance? The only reason (I know of) that leak could be viewed as bad would be the noise, and the ever so slim chance that it could suck cold air into the exhaust when you shut the engine off. (I know this is an issue with non-turbo engines as cold air can cause damage to valves, is it a concern on turbo engines?) SELECT * FROM users WHERE clue > 0; 0 rows returned Link to comment Share on other sites More sharing options...
MarcusDubya77 Posted February 22, 2006 Author Share Posted February 22, 2006 I had put the exhaust "cast" on before for reinforement, but this is at the flange, where its been welded to the exhaust pipe... :woowoo:check out the Diamond Gray Metallic Monster!!! Link to comment Share on other sites More sharing options...
meier motor sports Posted February 22, 2006 Share Posted February 22, 2006 see this is y u need staight pipes. 1 u dont hear a leak and 2 its all a big leak Link to comment Share on other sites More sharing options...
MarcusDubya77 Posted February 22, 2006 Author Share Posted February 22, 2006 my pipes are straight..its from the flange that meets w/ the DP :woowoo:check out the Diamond Gray Metallic Monster!!! Link to comment Share on other sites More sharing options...
liquidiq Posted February 22, 2006 Share Posted February 22, 2006 A leak that far back isn't going to be any loss of power. Link to comment Share on other sites More sharing options...
TSiWRX Posted February 22, 2006 Share Posted February 22, 2006 ^ I would think so, too.... Wouldn't a DP leak actually be "better" - despite sounding perhaps horribly ghetto? Wouldn't such a leak pretty much be equivalent to an exhaust cut-out? <-- I love Winky, my "periwinkle" (ABP) LGT! - Allen / Usual Suspect "DumboRAT" / One of the Three Stooges '16 Outback, '16 WRX, 7th Subaru Family Link to comment Share on other sites More sharing options...
hovied Posted February 22, 2006 Share Posted February 22, 2006 Ummmmmmm exhaust leak being better!? No... Any exhaust leak anywhere in the system is bad. As far as being equivalent to an exhaust cut-out, ummmmmmmmmmmmm no.... ______________ tHe HoV Link to comment Share on other sites More sharing options...
TSiWRX Posted February 22, 2006 Share Posted February 22, 2006 ^ Please explain.... I'm not trying to be an ass, but I truly don't understand. If the leak is post-turbo, why is that bad? Causes problems with scavenging? If so, wouldn't an exhaust cut-out cause the same problems? <-- I love Winky, my "periwinkle" (ABP) LGT! - Allen / Usual Suspect "DumboRAT" / One of the Three Stooges '16 Outback, '16 WRX, 7th Subaru Family Link to comment Share on other sites More sharing options...
TSiWRX Posted February 22, 2006 Share Posted February 22, 2006 OK, found something on his other thread, where he cited a potential UP leak: http://legacygt.com/forums/showthread.php?p=483811#post483811 Both edmundu's and Deer Killer's posts - 3 and 5, respectively. So, now I understand that a post-turbo leak could cause boost creep/spike (which would it be? both?) - but again, would this not mean that he would not see any performance decreases? And again, how is an exhaust cut-out different from this? Thanks. <-- I love Winky, my "periwinkle" (ABP) LGT! - Allen / Usual Suspect "DumboRAT" / One of the Three Stooges '16 Outback, '16 WRX, 7th Subaru Family Link to comment Share on other sites More sharing options...
luv2drive Posted February 22, 2006 Share Posted February 22, 2006 ^ Please explain.... I'm not trying to be an ass, but I truly don't understand. If the leak is post-turbo, why is that bad? Causes problems with scavenging? If so, wouldn't an exhaust cut-out cause the same problems? Turbo cars don't rely on the scavenging effect so it would be better, just to reaffirm. Link to comment Share on other sites More sharing options...
TSiWRX Posted February 22, 2006 Share Posted February 22, 2006 ^ Ah! Right.... OK, so let's see if I have this straight - scavenging would occur on the engine/manifold side of the turbo - not the exhaust side..... So, does this mean indeed that such a down-pipe leak would be akin to a cut-out? But then again, what would happen with the boost creep/spike? Deer Killer mentioned that our ECU would not be able to "remove" boost, to compensate, but would a difference in some other engine monitoring parameter cause subsequent decrease in performance in order to try to rein-in the over-boost situation? <-- I love Winky, my "periwinkle" (ABP) LGT! - Allen / Usual Suspect "DumboRAT" / One of the Three Stooges '16 Outback, '16 WRX, 7th Subaru Family Link to comment Share on other sites More sharing options...
MarcusDubya77 Posted February 22, 2006 Author Share Posted February 22, 2006 is there a way to know the difference between boost spike and regualr quick spooling w/o some sort of boost gauge?? What actually defines boost creep/spike..I have pegged 17.4 STGII on my AP and the delay caused jump from 14.1 to 17.4...Would this be creep/spike or simply the delay in the AP taking a reading?? :woowoo:check out the Diamond Gray Metallic Monster!!! Link to comment Share on other sites More sharing options...
liquidiq Posted February 22, 2006 Share Posted February 22, 2006 Ummmmmmm exhaust leak being better!? No... Any exhaust leak anywhere in the system is bad. As far as being equivalent to an exhaust cut-out, ummmmmmmmmmmmm no.... ummmmmmmmmmmmmmmm do research. Link to comment Share on other sites More sharing options...
andrew.anderson Posted February 22, 2006 Share Posted February 22, 2006 You can disregard my question in the other thread abou how the leak can about. I had not seen this thread. Link to comment Share on other sites More sharing options...
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