Ellesedil

That's the second shop that's said this in the last 30 days.

The possibility of this happening makes me question modding my car every time I think of it.

The possibility of this happening makes me question modding my car every time I think of it.

Measure 15 times, cut once.

Measure 15 times, cut once.

On top of things, there still could be a design issue when you start scaling up with additional parts. An open flapper is still going to be in the way of the wastegate dump tube. But we don't know for sure yet since we don't have anyone who has properly ported the turbo to make the wastegate more efficient while running an aftermarket BPV.

That... is actually something I haven't seen anyone post on here. Perhaps I simply wasn't paying attention, and sounds like it could be a reason they moved to the single-walled design.

I was just reminded of this from some posts in a different thread. There's a few people in the row of townhouses across the street who appear to be savvy enough to do some of their own work on cars. Within a few days of picking up my car, as I was pulling into my driveway and getting out, one of these guys commented about how "the Subaru sounds pretty throaty" and how he didn't notice that before. I wasn't really expecting a neighbor to mention how well my car sounds, instead of how loud it is. It was pretty cool, and we chatted for a minute or two.

Just to reset context here, the only part we have concerns about is the downpipe. To keep up with the song analogy, every artist has a song that could be better. I've yet to see anyone complain about their other parts, like their axle-backs.

Looks pretty good! You've got me thinking, blacked out lights and kept the chrome surround on a mesh grill....

The hangers came with the full exhaust. It might not be the exhaust moving, it could just be the plate flexing a bit. I know that thing can flex and there's not a lot of clearance between the exhaust and the plate.

I'm going to email Primitive to see what they think. I wish I could find out how much the exhaust moves.

So, the Primitive mid plate doesn't look like it fits with an aftermarket midpipe. There isn't really any room for the exhaust to vibrate without hitting the plate. Edit: here is the actual evidence

Do you still have your silver sedan? I've fallen out of the loop on what you're up to car-wise.

If someone is actually interested in that car, I can go check. It's on the east side of Portland, which is a bit out of the way since I spend 98% of time on the west side of Portland, but I can find some time to take a look if someone from out of town is interested in it.

That's horrible.

I don't understand that, especially in places that are even remotely urban. Just take it to a UPS store and have them take care of packaging and shipping and charge it to the buyer. That's what I did with my wheels when I sold them.

Besides that, though, it does look pretty clean. I wonder if that chrome is just some stripping that's removable.

That page is returning a 404 now.

The only thing I noticed is that boost isn't actually consistent in a more strict sense. It fluctuates about 1 PSI. At 0.574 seconds, it's 19.67. At 2.05 seconds, it's 18.69. At 2.435 seconds, it's 19.75. Then it starts dropping back down. Couldn't tell you if it's an important distinction or not, but I noticed it and thought I'd point it out in case it's relevant.

Honestly, I kind of agree with this, despite my experience. The exhaust is doing what it was advertised to do and nothing more. It has a potential problem with aftermarket BPVs, but only if you can't handle the boost that it builds up as a result. I think the only person that really went with a more extensive build with a Nameless downpipe was Swannee225, right? Did he ever upgrade his BPV? The good thing to come out of all of this is that the advice on installing BPV's changed from "sure, go ahead, it doesn't change anything" to "wait, they are actually engineered boost leaks and your tune should account for it."

Yeah, I was hitting that too with the stock exhaust. I resolved that a while ago. This is a new thing. It could be that the exhaust brace on the Nameless exhaust is a bit different (larger) than the OEM one. Or... it could be hitting somewhere else. I won't know until I can get under there and bang on the plate a bit to see what it's hitting.

So... it's not quite over. One of my skidplates is hitting something now. I suspect the mid plate might be hitting the exhaust, since the exhaust is quite a bit larger now. I won't know for sure until I can get under there and actually look around. I couldn't tell from looking under off to the side. I don't really have any next plans right now. There's things I'd like to do... but I don't have a realistic plan for that right now. As for the turbo porting, I don't know if my current housing is a lost cause. I was really hoping to see if a proper porting would help with the overboosting with an aftermarket BPV, so I'm disappointed I wasn't able to definitively answer that question. It's entirely likely it would have only made a small difference and I'd still have to resort to the OEM BPV. If I were to consider spending money on replacing the housing... I'd probably also be considering what to do to get into an 18g turbo instead. I can't really speak as to why the tuner tuned the car the way, but someone who does tune might be able to speak to that. So, the total holyshitthisisdifferentandreallyloudandeverythingisnewtome-ness has worn off a bit, but it's still plenty new enough for me to still get used to things. I will say this, based on my morning commute: when the power hits, it hits pretty hard. But... in normal every-day driving, the only real chance I have of hitting peak boost with my current tune is if I'm by myself on a highway on-ramp.

Ok, now that I have my car, I'm going to quickly recap my experience. English Racing installs the Nameless TBE with 5" mufflers and the Nameless BPV. My car, exactly like Ryan's, boosts to 20 PSI. Thus begins the attempt to try to get that under control. Idea of the flapper not opening enough is floated almost immediately, but no action is taken First attempt is to modify the downpipe to have more of a bellmouth entrance into the wastegate dump pipe - fahr_side has covered that well enough. This resulted in no change on the dyno. Port the turbo - this was the only thing that I was actually unhappy about. As we've covered here, English decided to enlarge the wastegate port a bit while rounding off the edge all around the port, and also remove some material in the passage way which would appear to not do anything at best. While I sent them the porting information we have here, they either didn't read it or ignored it. Porting resulted in a 1 PSI increase of boost - the opposite of what we wanted It's noted here that the flapper doesn't have much room to open anyway without contacting the downpipe, so how far it opens is moot in terms of a "what to do about it now" context The next idea is that since the flapper can only open so far and that the wastegate dump pipe is only so large, the flapper is blocking the path of air to the wastegate dump pipe and there's not much room for air to flow around the flapper. The suggestion, on a Friday, is to remove the seperation between the wastegate dump and the main exhaust to allow more space for air to flow around the flapper. Everyone thinks about it over the weekend and we end up pulling the ripcord on this experiment. Besides, instead of hacking up a part like this, there are others available that are already designed this way that we could simply go with. So, what we end up doing is re-install the OEM BPV. Boost is lower, but now it is inconsistent. Suggestion is to install a Grimspeed EBCS. The EBCS is installed and boost control is effective again. My final peak numbers are 275 WHP at about 6000 RPM, 325.22 WTQ around 4000 RPM, and a max boost of 16.41 PSI at around 4200 RPM. I unfortunately don't have a pre-install dyno plot for comparison. Some of these final numbers seem a tad low to me. For instance, I was expecting peak boost to be closer to 18 PSI than 16 given the exhaust + BPV consistently lived in the 20+ PSI range. The car definitely accelerates differently now than it did when on the stage 1 OTS tune, and not just in a "it's faster" sense. It behaves a bit differently, with the power seeming to come on later compared to stage 1. I've attached the dyno plot. The tune more or less levels-off power from 4000 RPM (where we peak on torque) to redline with only gradual changes. I do have some unmodified logs and a dyno plot comparison when my car was experiencing boost control issues with the OEM BPV reinstalled. While I can attach them, I'm not sure how useful they are for situations outside of the one I found myself in. I did ask for the log of my final dyno run, but I've yet to receive it.

What sorts of things have they done for you?