I am going externaly wastegated on my turbo and Ive did lots of forum reading and serching but it seems that you can either run your wastegate with your down pipe or just leave it open to atmosphere. So my question is witch way is better or does it matter? My wastegate will be hooked to my mannifold and I need to know if the other port needs to be tied in with my down pipe or if I can just run a pipe off it turned down twords the road and just let it go out into the atmosphere.. Thanks for the help in advance!!
Are you referring to open dump(atmospheric), or routed back into your down pipe? If so, it really depends what you want as far as sound...
P&P Tuning
420.5whp / 359.8wtq
QWK LN2 (P&P Tuning) wrote:Are you referring to open dump(atmospheric), or routed back into your down pipe? If so, it really depends what you want as far as sound...
Back into the down pipe is safer. 4 bangers with the exhaust manifold on the front of the engine, like DSM's and evo's, are notorious for their open waste gate dumps melting the dyno straps and them shooting off the dyno. AND if you want to do street night at the local strip you may need to have all your exhaust gasses exit through a muffler that terminates behind the drivers seat.
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Leafy (Club Jeffie FEA man) wrote:QWK LN2 (P&P Tuning) wrote:Are you referring to open dump(atmospheric), or routed back into your down pipe? If so, it really depends what you want as far as sound...
Back into the down pipe is safer. 4 bangers with the exhaust manifold on the front of the engine, like DSM's and evo's, are notorious for their open waste gate dumps melting the dyno straps and them shooting off the dyno. AND if you want to do street night at the local strip you may need to have all your exhaust gasses exit through a muffler that terminates behind the drivers seat.
Where do you come up with this sh!t?!?
P&P Tuning
420.5whp / 359.8wtq
What, its a concern. Youtube wouldnt be flooded with video's of it happening if it didnt happen fairly often.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
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Leafy (Club Jeffie FEA man) wrote:What, its a concern. Youtube wouldnt be flooded with video's of it happening if it didnt happen fairly often.
So you are basing this off of Youtube? Besides that, that would be dyno operator error if the straps were taken out.... Anybody strapping down a car should know to steer clear of this.....
P&P Tuning
420.5whp / 359.8wtq
How many dyno operators do you know that are actually intelligent? I know of 1, and thats because he's a WPI alum.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
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WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
Yea I was asking if it is better to run the wastegate dump tube to my down pipe or just run the dump tube down twards the road?? IMO I was thinking running it into my down pipe (with a nice even strait flow to downpipe) would be better but then other people leave it open. When I get this motor built and turbo kit installed I will be having it HPTuned and put on dyno as far as straps getting melted that sounds like shop error..lol.. Oh yea QWK LN2 I wasnt aware that the wastegate made any noise but as far as sound goes it dont realy matter just want to know where to run my dump tube, but if running it into my manni would quiet it down thats cool..
Open dump (atmospheric vent) is louder, and I like the sound of it. Recirculating it can be done too. To me there is no advantage or disadvantage to either way. Its all personal preference.
Thanks Vince thats the answer I was lookin for.. Oh yea I have my manifold on the way (TTR) but they dont put the external wastegate flange on I have to. So I dont know how to weld and dont now anyone who can put that on for me so would you (builtnboosted) happen to know someone I can ship it to so that I can get it done..If not thats cool and thanks again man!!
They really wouldnt put the flange on for an external wastegate? wow....... any metal fabrication shop can do that for you in no time, just make sure that it will clear anything that you will have to install. Make sure it will clear the downpipe, turbo, firewall, block, coolant lines, oil feed or return lines, and make sure there is room for the dump.....
open dump can usually control boost better and tends to make more power, pending clearances it could be easier to route
recirc can make less power, less loud, usually done on internally gated turbos
They should make the same power. But you must route the line sufficiently down the down pipe and at a shallow angle so as to minimize disturbances near the turbo exit.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
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WPI SAE Risk and Sustainability Management Officer
Cool more info I didnt know about..
Yea I was wanting to go with the open dump rout and it seems to be a good choice. Yea I know Im gonna have to watch out for the lines and other clearance issues and thanks for the heads up. Yea TTR said they dont put external wastegate flanges on their manifolds and I realy dont know where I can get one with it. Not the vulcan.
I have sent AMMFAB a couple messages but h must be pretty buisy because I havent heard anything yet. So besides that I dont know where to get a turbo manni with an external wastegate flange for an 2.2l ecotec, its a bummer..lol.. Thanks for the information and if its sumthing else Im missing please teach me..
What about R & D Fabs. Are they still open? I know atomic no longer sells their manifolds over the internet.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
Im not sure about R&D being open. Guess I will have to hold onto my TTR mnni untill I can get someone who knows whats going on and have experiance in doing external wastegate flanges..Its crazy man...lol..Cant get progress if cant get my manni done..
You could get a custom one made locally.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
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WPI SAE Risk and Sustainability Management Officer
if youre running a big turbo on low psi then id go with an external or else you might get some bad boost creep (wg spring set to 5psi but maybe seeing 10psi for example)
Im going to run a garrett t/3 57trim ,63 a/r and Im gonna tune it for 18-20lbs so dont think I have to worry bout anything like that.. Im in Hagerstown MD and I dont think there is any shops around here that do that sordda thing. But if you know someone around this area please let me know and I will set sumthing up..Thanks
what are you wanting to hit power wise? stating boost psi isnt really all that helpful
any welding shop should be able to do it for you relatively inexpensively... Just make sure you know what the manifold is made out of, order a wastegate flange, they might be able to order the piece of pipe you will need, which should be VERY short piece.
its as simple as drill the hole, ream it out to fit the pipe, weld the pipe to the wastegate flange, weld the pipe on the manifold. Shoudlnt take long at all.
I have my old wastegate that you could use if you need one. its an authentic tial 38mm, silver in color. I forget what spring I have in it.
My power goal is 400 but I would be happy with 380ish . Yea builtnboosted that would be cool and realy nice of you.. I didnt know any welding shop could do that for me so Im gonna call around 2day and see what I can come up with. Yea I was thinking about no more than 3 inches on the pipe for the wastegate flange. I found a couple sites that sell the wastegate flanges so what size is yours so I can order the rite flange...38mm?
all depends on what youre running for a wastegate, and the tubing size should be the same to fit inside the flange.
also just dont go and weld a pipe on, get the manifold on and see what works for your car clearance wise so you can actually route the dump tube
I want to run a Tial 38mm external wastegate.Yea this is just kinda @!#$ty man just wish I could have gotten a manni with the flange already on it and I do know where I need it for all my clearence issues, and I know where Im gonna run my dump tube. Its just me getting someone with experiance in doing turbo manifolds to get this done for me is where Im at...stuck....lol..I have left PMs with the fab guys on here and ecotecforum but havent heard anything yet, but Im sure there probably buisy. Oh yea I called arund down here to get my manni done and NOBODY is willing to do it...
.. Im just hoping that this manni issue dont hold me up to long because I would realy like to move forward, I mean Im still gonna get all I need parts wise just cant do anything with the @!#$ till I get my manni done!! Thanks LAFNGAS for helping me and the others too..
