wastegate type
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Senior Member
Joined: Oct 2005
Posts: 689
From: Sarasota, FL
wastegate type
so i was getting my turbo set up list ready for a when i start buying the parts really soon and came across a question i couldnt really find an answer for. so i know i want to get a evo3 for my gst but wasnt sure if it should have a internal or external wastegate. its going to be a daily driver but also a part-time track car every now and then for fun. and if i do go external, is it better to have to wastegate on the o2 housing or the header?
Senior Member
Joined: Jul 2005
Posts: 2,891
From:
RE: wastegate type
well an external would be better in any situation because it eliminate's boost creep... you could get away without one with the evo3 but if you have the money i'd say why not, right? as far as where you mount i would probably say on the header, even though i'm not sure if it makes a difference...
Super Moderator
Joined: Jan 2006
Posts: 11,758
From:
RE: wastegate type
external is definetly better. If you have the money then i would do it. But obiously its alot more money because you need to buy the wastegate, and manifold that can mount the wastegate up to and then the dump tube either to the atmosphere or welded back into the exhaust. And you have to have the wastegate on the manifold. Because it has to be able to dump the air prior to reaching the turbine 
Joined: Jun 2007
Posts: 740
From:
RE: wastegate type
What kind of boost will you usaually be running? I just installed an E3 2 months ago, I upgraded to 34mm wastegate and ported the turbo and it runs great, I am on stock fuel so I am at 15psi, I have 0 boost creep, if you are going to run over 20 all the time it doesn't matter but the stock wastegate is fine.
Senior Member
Joined: Nov 2007
Posts: 714
From:
RE: wastegate type
why do i hear that all the time, that it doesn't matter if you're gunna run aboe 20 psi all day long,everyday? just cuz you got enough force that boost creep gets eliminated? and yeah i conqur with everyone, i have a 16g and if i had the money i'd go with an external wastegate,might as well
Joined: Jun 2007
Posts: 740
From:
RE: wastegate type
Becuase due to the theory of fluid dynamics when you run under 20psi the exhaust is going to mostly go through which ever hole is easier to flow through but at higher PSI it comes to an equilibrium where you are pushing hard enough to overcome that.
