OustedFairlady Posted September 29, 2010 Share Posted September 29, 2010 (edited) I came across this odd wastegate location/design, and I'm considering doing it for my Supra, as I've just upgraded its turbocharger. Granted, it's not a wild huge turbocharger, but it's better than destroyed, which my CT26 was. I'm fairly comfortable in my abilities as a technician, but I am by no means an expert in the care and feeding of turbochargers; with that said, this design looks as though it should work, but seems rather cumbersome...granted, it's not for a supra, of course, but I'm curious to know if some more wizened soul might be able to impart some of said wisdom upon me as to whether or not this is a good design for me. I intend to fabricate it myself, if I end up going this route, so money isn't exactly the issue. However, if the level of "PITA" is entirely too much, I'll just settle for an eBay turbo manifold for now. So, thanks in advance. Thoughts? *EDIT* Forgot to add...I'm using a T3/T4 hybrid, .50A/R compressor, .63A/R turbine, from what I understand. I won't pretend to understand what all that means yet, so feel free to either explain or direct me to an explanation... Thanks again. Edited September 29, 2010 by OustedFairlady Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted September 29, 2010 Share Posted September 29, 2010 (edited) That looks like it was done for someone with big space constrictions. I don't like the way the wastegate exhaust is merged into the main downpipe. Part of the reason for making a divorced wastegate and downpipe is to get rid of some of the turbulence caused by the wastegate gases entering the exhaust stream. That design seems counter-intuitive. Edit: Just saw your edit. Go to http://www.turbobygarrett.com and read the turbo tech sections. Edited September 29, 2010 by mario_82_ZXT Quote Link to comment Share on other sites More sharing options...
280zex Posted September 30, 2010 Share Posted September 30, 2010 Ok just by looking by the photo above this setup is still using the stock wastegate "hole" in the body of the turbo. This is the same "hole" that an internal wastegate flapper style uses. Now the piston style gate in the photo may flow better than a stock flapper style (10% more?) youre better off using that piston style wg before the turbo. I mean if your gona weld up yours why not do it right the first time?? just my 2 cents.. Quote Link to comment Share on other sites More sharing options...
Pyro Posted September 30, 2010 Share Posted September 30, 2010 not so odd. looks like the one I built for my car. Has been working great for 5 or 6 years now. Quote Link to comment Share on other sites More sharing options...
Pyro Posted September 30, 2010 Share Posted September 30, 2010 Quote Link to comment Share on other sites More sharing options...
OustedFairlady Posted October 1, 2010 Author Share Posted October 1, 2010 Sweet thanks for the help guys. I'll read up on the link, and do a little reading. I'm pretty sure I'll go the turbo manifold route so I suppose it's kinda academic now. I think that wastegate setup was for a Plymouth reliant or something like that. Anyway, thanks for the help! Quote Link to comment Share on other sites More sharing options...
260DET Posted October 2, 2010 Share Posted October 2, 2010 Like your setup Pyro, very neat, thanks for the pic. Quote Link to comment Share on other sites More sharing options...
Tony D Posted October 2, 2010 Share Posted October 2, 2010 youre better off using that piston style wg before the turbo. So the stock wastegate takes it's exhaust for venting overboard after the turbo then, eh? Sometimes I wonder about the posts here recently... Quote Link to comment Share on other sites More sharing options...
280zex Posted October 3, 2010 Share Posted October 3, 2010 So the stock wastegate takes it's exhaust for venting overboard after the turbo then, eh? Sometimes I wonder about the posts here recently... Blow me Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted October 4, 2010 Administrators Share Posted October 4, 2010 280zex, I suggest you don't do that again. Quote Link to comment Share on other sites More sharing options...
Daphur280 Posted October 5, 2010 Share Posted October 5, 2010 is this custom or are these sold like this, cos I want the Ext WG but I dont want to weld onto cast manifold... Quote Link to comment Share on other sites More sharing options...
Daphur280 Posted October 5, 2010 Share Posted October 5, 2010 280zex, I suggest you don't do that again. I think he ment with his BOV... Quote Link to comment Share on other sites More sharing options...
Pyro Posted October 13, 2010 Share Posted October 13, 2010 custom. but easy to make yourself. buy a standard 5 hole wastegate plate (1/4 inch), add the downpipe, then add the wastegate. the top wastegate joint is a slip fit. I don't use gaskets anywhere on the turbo. just high heat rtv. That includes the turbo at the manifold, downpipe to the turbo, and wastegate to the downpipe. Quote Link to comment Share on other sites More sharing options...
Tony D Posted October 18, 2010 Share Posted October 18, 2010 I have seen some guys have an o-ring groove cut into their flange and use copper wire to seal them. Trick as heck! I always wondered about high temp o-rings since they are used in aircraft turbines, but with the copper wire setup being so simple and trick, why not? I, too run red RTV on my flanges. Keep them flat and true and there will not be a problem, the RTV will stand up and not blow out. If it does, you always can o-ring them! Quote Link to comment Share on other sites More sharing options...
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