10-22-2019, 10:01 AM | #111 |
Rainbow Racer
1008
Rep 2,539
Posts |
^^ what you could do if you wanted to keep the quad exhaust tips is to route that pipe similar to this (this is what I had in mine to do on mine)
obviously the bends would be smoother than what my hacked drawing shows lol. Essentially get rid of the OE resonator/H-pipe, run new pipes, add length to the shorter side to equalize it more (doesn't have to be 100%, actually a slightly off-set would give it a slight growl, think R32 VR6-like since every other exhaust bank on there's is offset a few inches when the pulses reach the manifolds), and have it merge right before the OEM muffler in an offset fashion. I'll have to take pics of this when I get mine completed. Hopefully it'll be easy to create and only one try. It really shouldn't be more than $200 to have an exhaust shop complete this. Actual PIC of the OE set-up from underneath the car (was trying to replicate the OE set up in the top drawing above):
__________________
-Loe P.-
Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU | Pullies + basic bolt-on mods | 10.861@127.90mph ] Current Car: F82 M4cs | TT-RS | On Order: i4 M50 Last edited by spool twice; 10-22-2019 at 10:08 AM.. |
Appreciate
1
ntg442887.50 |
10-22-2019, 10:24 AM | #112 | |
Colonel
2888
Rep 2,147
Posts |
Quote:
Gotcha. I thought of that, but then he mentioned that the front DP is ~13-15 inches longer than the other, so I didn't see how to add that full length back in the position you drew up. But geez, if all it takes is a few bends and a res delete, I'd rather go that route anyways. But if full equal length is needed, I'm happy to go single exit. I'm such a sucker for the huge N1 style fartcans anyways. Don't care what people think of it if it'll sound anything like the glorious RB |
|
Appreciate
0
|
10-22-2019, 10:47 AM | #113 |
Private First Class
112
Rep 131
Posts |
Yes. Those are on the right track. One thing I would pay attention to is changing the placement of the resonators in the AWE version to reflect the difference in dp length. And spool twice, I would do the same thing with the stock secondary catalytic converters in your drawing also.
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
Appreciate
1
ntg442887.50 |
10-22-2019, 10:50 AM | #114 |
Private First Class
112
Rep 131
Posts |
I have my ZCP exhaust standing up in my garage and I'm tempted to hack away at it to see if I could keep the stock sound, but with my ideas incorporated..
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
Appreciate
0
|
10-22-2019, 04:51 PM | #115 |
Old guy
306
Rep 266
Posts |
Didn't realized there was that much room behind the OEM muffler. This might be simpler than I thought. I wonder if cutting a portion of the rear driver side pipe (after eliminating the stock H pipe) and adding a loop to it to add some length to the pipe (I think that's what Spool Twice is suggesting) should make it equal.
|
Appreciate
1
ntg442887.50 |
10-22-2019, 05:15 PM | #116 | |
Private First Class
112
Rep 131
Posts |
Quote:
It's strange how pipe/tube seems to take up a lot more room than one expects. Pie cuts are looking more and more like a possibility to me as I go through these design iterations.
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
|
Appreciate
0
|
10-22-2019, 05:22 PM | #117 | |
Old guy
306
Rep 266
Posts |
Quote:
Or merger it and add this muffler https://www.summitracing.com/parts/vpe-10632/overview/ The other thing that can be done is to put a section of exhaust pipe of bigger diameter to slow down that side of the exhaust flow. |
|
Appreciate
0
|
10-22-2019, 05:32 PM | #118 | |
Colonel
2888
Rep 2,147
Posts |
Quote:
Last edited by ntg44; 11-15-2019 at 06:45 AM.. |
|
Appreciate
0
|
10-23-2019, 12:02 AM | #119 | |
I'm Batman!
3942
Rep 1,471
Posts |
Quote:
You guys have no idea how much I want this project to become reality
__________________
S55, 2JZ, M48.00 |
|
Appreciate
0
|
10-23-2019, 12:43 AM | #120 |
Private First Class
112
Rep 131
Posts |
If I lose interest in this project and don't manufacture it, I'll certainly make sure everything is put out there to help others...including the worthless exhaust makers who've charged so much over the years to hurt our ears and pocketbooks
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
10-23-2019, 01:00 AM | #121 | |
Colonel
3204
Rep 2,156
Posts |
Quote:
You need to add 12-15" of piping to the passenger side, then MERGE them somehow before the exits to equalize the sound pulses? Just exactly like spool twice's drawing. Last edited by DanMpower; 10-23-2019 at 01:26 AM.. |
|
Appreciate
0
|
10-23-2019, 05:06 AM | #122 | |
Old guy
306
Rep 266
Posts |
Quote:
But yes I was suggesting adding piping before the valves and removing the stock h pipe. |
|
Appreciate
0
|
10-23-2019, 06:11 AM | #123 | |
Colonel
2888
Rep 2,147
Posts |
Quote:
My local fabricator said he would make a custom muffler, but I'm thinking I'll need to go E46 M3 style with both entrances on the driver's side, with a horizontal muffler and passenger side exit. My only concern right now is if I need to merge those 2 pipes into 1 before entering the muffler. I'm going to try to get under a lift to figure this all out. All these aspects are theoretically simple, but it's a different story once you get under the car and realize what clearances you thought you had don't exist. |
|
Appreciate
0
|
10-23-2019, 05:09 PM | #124 |
Rainbow Racer
1008
Rep 2,539
Posts |
A small snag, so the front of the diff (or near the outlet of the OE resonator/H-pipe), there is almost no space to curve the passenger side towards the drivers side to add length unless you want pipes that hang low and increase the risk of hitting road debris.
Back to the drawing board. There is a lack of room for 10-13" of length and to also merge the pipes once at least 90% equalized, it'll take some creativity. |
Appreciate
0
|
10-23-2019, 05:56 PM | #125 | |
Lieutenant
362
Rep 518
Posts |
Quote:
Without reducing performance potential and retaining quad outlets and a valved muffler with no ugly pipework hanging down under the car, the midpipe is the only area that can be modified to improve the sound and maintain the required features realistically. |
|
Appreciate
0
|
10-23-2019, 06:18 PM | #126 | |
Private First Class
112
Rep 131
Posts |
Quote:
Does this have anything to do with the RWC match last weekend?
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
|
Appreciate
0
|
10-23-2019, 08:52 PM | #127 |
Colonel
3204
Rep 2,156
Posts |
Maybe someone should come up with a design kinda like the AWE race system but with extra piping to equalize the passenger side, then merge, once we remove the stock muffler there is quite a bit of room for some extra piping.
We could also add some race mufflers where the stock cats are, to keep the system a little more tame, of course we lose the valve system though. Maybe something like this, excuse the 1st-grade drawing. Last edited by DanMpower; 10-23-2019 at 09:06 PM.. |
Appreciate
0
|
10-24-2019, 06:10 AM | #128 |
Rainbow Racer
1008
Rep 2,539
Posts |
^^^definitely would have room with a different muffler/back-box or a full back-box delete for sure.
Another thing I was thinking is to somehow cross the two pipes were the OE resonator/H-pipe sits by deleting it, taking two 3" pipes and turn them more into an oval shape and criss-crossing the pipes, so not actually merging them, just having them swap banks. I say this because a oval-shaped 3" pipe (or slightly crushed) will provide a similar flow to a rounded 2.5" pipe. The passenger side pipes then become the drivers side pipes directly after, and the drivers side pipe is already inherently longer than the passenger side, and then swing the drivers pipe to the passenger side near the rear muffler/back-box to merge them, and route the drivers side pipe back to the drivers side piping. ^^that could actually work, because of two fold reasons: 1) you are reducing the "drivers side" length overall 2) you are increasing the "passenger side" length overall
__________________
-Loe P.-
Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU | Pullies + basic bolt-on mods | 10.861@127.90mph ] Current Car: F82 M4cs | TT-RS | On Order: i4 M50 Last edited by spool twice; 11-04-2019 at 08:21 PM.. |
Appreciate
0
|
10-24-2019, 08:50 AM | #129 | |
Old guy
306
Rep 266
Posts |
Quote:
https://burnsstainless.com/collectio...=8762177552475 Another solution (if possible) would be to swap the rear exhaust manifold with the forward one. This would swap the turbos downpipe exit around and face them in the correct orientation. This would allow for the downpipes to be switched around (would have to be custom made). The benefit of this is that then you can use any exhaust since it would be on the OEM position. The down fall is that is the most expensive solution. Last edited by MR_X; 10-24-2019 at 08:57 AM.. |
|
Appreciate
0
|
10-24-2019, 01:55 PM | #130 | |
Private First Class
112
Rep 131
Posts |
Quote:
Hey nt, I'm adding the 14156 resonators to my exhaust today. Seeing what you did gave me the inspiration because I'm trying to stop a tiny bit of rasp that creeps in at full throttle....I'm confident it will work. I'm installing them in a staggered fashion so that the drivers side will be ~14" in front. My theory is that will keep the sound 'correct', at least to me.
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
|
Appreciate
0
|
10-24-2019, 01:58 PM | #131 | |
Colonel
2888
Rep 2,147
Posts |
Quote:
|
|
Appreciate
0
|
10-24-2019, 02:24 PM | #132 |
Private First Class
112
Rep 131
Posts |
Yeah I don't really know about the positioning either, but my feeling is that I want the resonators to act on the exhaust the same distance from the turbine outlets on each side....so I'll see.
I'm going to have a BMW shop do some dyno comparisons with my stock ZCP exhaust for me next week. I want to see if my idea affects the power at all. I'll present the results either way
__________________
2019 AMG GTR
2001 911 Turbo 2021 Porsche Macan Turbo 2013 BMW X1 xDrive 35i |
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|