A couple companies also offer a "stopper bar" that basically jams the flapper shut. Welding the wastegate shut and using a downpipe with the wastegate opening blocked off (like stock or hks) would probably be a more thorough option.
we've been trying to get area1320 to make us some of their "stopper bars" to put in the package but i dont know whats goin on over at their shop right now.
Yup, you either tack weld it shut or you can physically bolt some sort of bar to the flapper door hinge thingy to keep it from opening.
Ok I was going to post this in a PM just so I didn't sound like such a noob. When and why would I need this, and what are the trade offs? I am tempted just because "welding my flapper thingy" sounds like a cool thing to do.
St00pid n00b question - what is the benefit of going with this set up and what type of mods from stock are required to take advantage of it? Also, what sound does it make?
Since no one on this site seems to be able to answer this FAIL I actually had to type a few key strokes to find my own answers. Here is what I found so far. External An external wastegate is a separate self-contained mechanism typically used with turbochargers that do not have internal wastegates. An external wastegate requires a specially constructed turbo manifold with a dedicated runner going to the wastegate. The external wastegate may be part of the exhaust housing itself. External wastegates are commonly used for regulating boost levels more precisely than internal wastegates in high power applications, where high boost levels can be achieved. External wastegates can be much larger since there is no constraint of integrating the valve or spring into the turbocharger and turbine housing. It is possible to use an external wastegate with an internally gated turbocharger, though this generally involves welding the internal wastegate shut to avoid unwanted leaks. Here is a link that explains alot: http://forums.nasioc.com/forums/archive/index.php/t-59271.html External wastegates generally use a valve similar to the poppet valve found in the cylinder head. However they are controlled by pneumatics rather than a camshaft and open in the opposite direction. External wastegates can also use a butterfly valve, though that is far more rare.
Thanks Mike. Still curious as to what boost levels and/or power targets necessitate an EWG vs. IWG. Alternatively, at what power levels does the EWG transition from a "nice to have" to a "should/must have"? Also, nobody has answered what sound the EWG makes... Also, there are no toe/foot shots in the pix, what gives?
^ From what I read it sounds like "High" Boost is a relative term depending on compression and other variables. I think 20psi on a stock WRX is high. There is a video out there of a car with EWG I will try and find it.
Nice. May look into myself. Will you guys be selling the up-pipe with the EWG or just the up-pipe and dump tube?
IMO this is awesome, but EWGs sound like ass, think an extreme exhaust leak every-time you get into high enough boost, some like it, i dont, but if i had to have one, i could live with it.
it definitely gets loud when it opens up...but on the same note it will only open up at max boost so normally daily driving it wont be loud unless you are hitting the gas hard and opening her up. tux121 - we will be offering it up both ways..with or without the tial 38mm wastegate. i know clark has tuned a few wrx's with not so high boost and the ewg setup and he absolutely loved teh way the car performed. there is a thread on nasioc about one of them somewhere but i cant find it right now.
thanks! i was talking particularly about mike and tux's near stock cars. not your 30psi beast lol. also depends on spring etc
I was thinking this would even help me, if it make boost control more accurate it could clean up the curve a bit. Just don't know if I could live with even more noise. Although I am not sure its posible to make things any better than they are today after Tom worked his magic.
keep in mind also if you are running a 3 port design boost solenoid(ie, gm boost solendoid) you can control when the wastegate will see boost, effectively telling it when to open.
Here is a picture of where the Tial wastegate ends up after it is install with our EWG Up Pipe Kit. Look at all the room! Our EWG Up Pipe kit fits with more downpipes than any other kit on the market. It even fits the huge TurboXS 4" DP!! More EWG info: http://www.grimmspeed.com/catalog/product_info.php?cPath=22&products_id=121 Justin
