a.lim Posted May 11, 2009 Share Posted May 11, 2009 im in the market for a 38mm EWG setup and i am in a dilemma. i really do not like the sound of the EWG dumped into the atmosphere and was planning on rerouting it back into the downpipe, but i've been hearing that you'll loose the power gains of a ewg. that means im paying $700 just to get rid of boost creep.. or i can dump it with a ridiculous sound on WOT but gain some power. can anyone with a ewg setup chime in on this? Link to comment Share on other sites More sharing options...
mwiener2 Posted May 11, 2009 Share Posted May 11, 2009 put a motorcycle muffler on the EWG dump tube. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
AKLGT Posted May 11, 2009 Share Posted May 11, 2009 Well, the guy who's building 2 DOM3 and DOM4 set ups has it dumping back to the dp and so far, doesn't seem like it's going to lose the power potential from the EWG set up. If I were to go EWG, maybe next year, that's exactly what I'd do. Besides, you're dumping AFTER the turbo, so don't see how that will lose the benefits of going EWG. Wiggle wiggle wiggle wiggle wiggle yeah!!! Link to comment Share on other sites More sharing options...
a.lim Posted May 12, 2009 Author Share Posted May 12, 2009 Well, the guy who's building 2 DOM3 and DOM4 set ups has it dumping back to the dp and so far, doesn't seem like it's going to lose the power potential from the EWG set up. If I were to go EWG, maybe next year, that's exactly what I'd do. Besides, you're dumping AFTER the turbo, so don't see how that will lose the benefits of going EWG. wont back pressure in the exhaust play a role in yielding power? even so, I am running a full 3" TBE so its least restrictive.. id figure it would be fine. Link to comment Share on other sites More sharing options...
snow05gtRI Posted May 12, 2009 Share Posted May 12, 2009 itsme dumps his back into the DP and hes got lots of powah and it holds boost incredibly well... Link to comment Share on other sites More sharing options...
NSFW Posted May 13, 2009 Share Posted May 13, 2009 Dumping to the muffler will have less backpressure than dumping to atmosphere (which basically has none) so I'd expect to lose a bit of power that way. However I'm pretty sure you would have more power than an IWG just because the wastegate itself is much less of a construction. Link to comment Share on other sites More sharing options...
mwiener2 Posted May 13, 2009 Share Posted May 13, 2009 Wait a tic... How could anything obstructing the wastegate dump cause a power loss? If anything, it would cause a major power increase until the motor popped. The Wastegate only opens if the ECU wants LESS from the turbo. That baby is clamped shut when we want more more more. The only sensible thing to say about where the dump is plumbed is that it will change WGDC settings, not power output. It'll change overall noise too. Noise mainly though. But don't change EWG plumbing unless you plan on getting a re-tune or have a standalone boost controller. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
NSFW Posted May 13, 2009 Share Posted May 13, 2009 You get the same compressor power either way, sure. But the engine has to pump exhaust out. If it has to pump exhaust into exhaust pipes that have backpressure, that takes more power than pumping exhaust through a two-foot tube than opens to atmosphere. Probably not much more, but still. Link to comment Share on other sites More sharing options...
mwiener2 Posted May 13, 2009 Share Posted May 13, 2009 No, it just means the Wastegate would have to open further to vent faster. Only downside to that is boost creep or other overboost issues. The turbo itself is the largest restriction in the exhaust. Any extra backpressure might hurt a peak HP number a little. but it'd only show on the dyno. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
NSFW Posted May 13, 2009 Share Posted May 13, 2009 So you're of the opinion that there's negligible power to be gained by venting to atmosphere as opposed to merging the wastegate with the downpipe? Link to comment Share on other sites More sharing options...
mwiener2 Posted May 13, 2009 Share Posted May 13, 2009 Yes. The EWG helps by creating faster spool due a to better flow through the turbo. Better boost control due to ability to change pressure on both sides of the diaphragm as well as the ability to change springs. And the only option for those larger turbos. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
NSFW Posted May 13, 2009 Share Posted May 13, 2009 Food for thought: http://forums.nasioc.com/forums/showthread.php?t=1154811 I don't believe the guy who claims that merging the EWG loses "50 to 100%" of the gains, but I don't think it's negligible either. I wouldn't do VTA just because of the noise, but I do plan to merge and at least get some gains over IWG (especially since I'll be merging post-cat). Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.