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02-22-2017, 09:03 AM | #1 |
Scooby Specialist
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Internal vs. External Wastegates
Saw this posted on Motoiq.com this morning: http://www.motoiq.com/MagazineArticl...Wastegate.aspx Interesting discussion, and includes the Bren Tuning comparison of KillerB's internal vs. external wastegates for the FA20DIT engine. Long story short, external wastegates are the way to go if you can package them and aren't worried about emissions.
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02-22-2017, 03:07 PM | #2 | |
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Quote:
1 - BWWAAAAAAHHHHHHHH!!!!!! 2 - Less backpressure in the exhaust manifold 3 - Scene points 4 - see #1 Cons: 1 - Noise 2 - Emissions Noise can be circumvented with a well designed recirculating setup. Killer B has a really sexy one that's done right and probably makes +/- 10whp from the dumped version. Emissions is trickier, but that can be fixed with a proper spring and EBCS setup. With a 4 port, you can run a much lighter spring and still have enough pressure to run high boost. |
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02-22-2017, 03:54 PM | #3 |
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Very cool article. Glad we could be a part of it!
We saw no difference on the dyno, but in all honesty they were not done back-to-back. The sessions were done months apart. Maybe there was a 10hp difference, maybe not? My butt dyno couldn't detect a difference, but there was definitely no more BWWAAAAAAAAAHHHH!! |
02-22-2017, 04:03 PM | #4 | |
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You notice much difference between the recirc EWG setup and the IWG in terms of sound? |
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02-22-2017, 04:12 PM | #5 |
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on the stock or an IWG turbo couldn't you just plumb the IWG back in and leave the EWG's shut for emissions on a basic tune?
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02-22-2017, 06:20 PM | #6 | |
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Yes you could get crafty and do something like that. Going from EWG to IWG means removing the IWG valve perma-close hardware, putting the IWG actuator back on, plumbing it, capping the EWGs, and loading your IWG tune. That should cover it. |
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11-07-2017, 01:03 AM | #7 | |
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Quote:
What did you mean by 4 port? And lighter spring do you mean in the ewg? I'm just wondering I want the killer b header with ewg my thing is I'd like to pass emissions if possible. I already have EGR delete done. My county does not test emissions they do in the county next to me but not mine. But when I go for sticker they are going to see that under the car. Well maybe not if you can get the skid plate back on hiding all of the ewgs. |
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11-07-2017, 02:50 AM | #8 | |
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It's got the extra port so that you plumb it in this manner: By doing that, you can make the boost go to either side of the diaphragm. By running the boost to the underside of the diaphragm, you can use it to hold the wastegate closed longer than the actual spring pressure will allow by just fully venting the boost signal with a 3 port. It let's you run a lighter spring so you can run a wider boost range. 3 ports give you about twice spring pressure. 4 ports are more, but I'm not sure exactly how much. The point is you could run a 5 or 7 psi spring and have a tune that's mild in the lower end of the throttle map for emissions and full blast when you floor it. |
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11-07-2017, 04:23 AM | #9 |
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With my super quiet exhaust my EWGs sound like two big hair driers under the hood. So cool! |
11-07-2017, 08:07 AM | #10 |
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11-07-2017, 08:35 AM | #11 |
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11-07-2017, 10:38 AM | #12 |
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11-07-2017, 07:21 PM | #13 |
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11-07-2017, 07:32 PM | #14 |
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I'm no longer using the factory plastic under tray. Instead I'm using an aluminum tray with an access door for oil changes. I'm still using the factory skid plate with the spacers provided with the Perrin header. The EWG recirculation is custom, done by my tuner. They used to have atmospheric dumps, got old real quick. First time my dad heard them he thought I lost another motor! I'll try to get some pics with it up in the air. Given the custom nature I'm not sure it'll be all that helpful
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11-07-2017, 07:35 PM | #15 |
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11-07-2017, 07:53 PM | #16 |
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11-07-2017, 08:51 PM | #17 |
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and this is the point
As I've grown older, recirculated WGs have become more of a necessity. It's highly subjective (sound) and I work with several younger guys who would still not even think twice about VTA and hood exit exhausts |
11-08-2017, 06:59 AM | #18 |
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11-08-2017, 07:27 AM | #19 |
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11-08-2017, 07:29 AM | #20 |
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11-08-2017, 01:14 PM | #21 |
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Oddly enough, I don't. No magic though, just a lot of work
It varies by turbo and options, but you can find all combinations right here... Twin Scroll Fury Turbo Kit |
11-08-2017, 01:26 PM | #22 |
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I’ve emailed them before begging for a external recirc on there stock turbo kB header setup. They said they have no plans for the old header but will have one up for the new header. Why make a recirc kit for a header that’s 1 year old? I don’t get it myself I’m willing to pay whatever the sound is nasty and not in a good way.
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11-08-2017, 05:26 PM | #23 | |
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Quote:
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11-08-2017, 07:07 PM | #24 | |
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I knew it, I should have just given you all my money from the get go. LoL |
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11-08-2017, 09:50 PM | #25 |
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Well that price is for the setup ready to bolt in, no fab work.
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