11-13-2019, 09:34 AM | #331 | |
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11-13-2019, 10:30 AM | #332 | |
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11-13-2019, 04:26 PM | #334 |
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Exhaust shop needs to custom make a chamber box for me, they can't seem to bend the pipes for the x-pipe I purchased so the chamber box should do everything I need it to do (mix the exhaust pulse and not really for scavenging effects).
Plan B is to find another exhaust shop. The only thing I don't like about the exhaust is the 2,000-2,500 truck-ish exhaust note in sport/sport + (like an all stock S55 exhaust), below and after sounds great, smooth, snarls, brassy. Once I can source an x-pipe or chamber box for me, it'll be essentially ideal. Best of luck RMDZidane, it seems like you or your shop can make those bends with their machines, mine can't so Im stuck with the H-pipe still (for now) |
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11-13-2019, 05:20 PM | #335 | |
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Mine is a little different than RMDZ's - I'm merging the 2 pipes before the muffler into a single pipe, then to a considerably bigger muffler to a single exit. He's taking his time to measure the lengths to make sure it's right though, so I definitely appreciate the extra effort he's putting in. Firm believer in the "do it once, do it right" philosophy. Hoping tomorrow blows my ears away. |
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11-13-2019, 05:29 PM | #336 |
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It'll sound different for sure, like smooooth that I can't seem to capture in videos (aside from a truckish sound at small throttles in a 500rpm rev range but thats likely my h-pipe and OE exhaust lol)
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11-13-2019, 05:51 PM | #337 |
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I like it, your car sounds so pissed off. The tone also sounds more mechanical like in a German way. Very interesting nonetheless.
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11-13-2019, 06:00 PM | #338 | |
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Good fabricators can cut bends to make the shape that is needed. Mandrel bending machines are REALLY expensive. I found out when I did this in 2017 that when the exhaust length disparity was 3-7" the note became really unpleasant and flat. But when they were made closer to equal length it all really came together. That's what I'm trying to find the time to solve today and tomorrow with my midpipe design. BTW, I think my M3 is somewhat cursed. Bad coilpacks, leaky intercooler, and today two nails in my tires.
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11-13-2019, 06:08 PM | #339 | |
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11-13-2019, 06:25 PM | #340 | |
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Correct. He extended the passenger side pipe exactly 14 inches and crossed it over to the driver's side. From there, this will enter a Y pipe followed by a U pipe into a Magnaflow sport muffler (he ordered it, I went with his recommendation because I am willing to sacrifice volume for no drone). Finally, single exit out into a 4 inch "JDM fartcan" style tip on the passenger side. The muffler we chose is roughly 80% the size of the stock muffler, so I'm expecting good results. Currently, we only have my existing Magnaflow 14156 resonators before the muffler, but we are prepared to add a second set of resonators if we get any undesirable characteristics. Single exits can get pretty loud, so we'll see how this goes before putting the second resonators in, or switching to a louder muffler if it's too quiet. I will be picking up the car tomorrow, and I don't think I will be sleeping much tonight Last edited by ntg44; 11-13-2019 at 06:54 PM.. |
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11-13-2019, 06:52 PM | #342 | |
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In a matter of 2 weeks, between spool twice, RMDZ, and me, we've come up with 3 legitimately different exhaust layouts to the standard M3/4/2C. Previously, it was either stock, a louder and crappier version of stock, or AA mid (again, props to AA for doing something different). I believe mine will sound significantly different than what we've heard thus far, so let's get some more members to share their ideas to push this forward! We can't all try everything because we're not all endless money pits, but every little iteration or contribution helps, and we can all learn from each other. The answer for equalized dual exit is out there - someone just needs to take everything we've learned so far and get us there. Although spool twice is definitely closest. Not that I care, I'm embracing my single fartcan. Looking forward to sharing my opinion of the end result with everyone. |
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11-13-2019, 07:43 PM | #343 |
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Someone has any good photoshop skills? Wonder how this car would look like with 2 tips as a center exit exhaust ala GT3. I’m pretty confident I can build a diffuser for it.
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11-13-2019, 07:47 PM | #344 |
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Rather than the exhaust sound, I like hearing engine note itself (which is what ASD synthesizes if not disabled). However the issue is it's a bit too quiet. Adding a loud exhaust doesn't seem to improve it anyway.
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11-13-2019, 10:26 PM | #345 | |
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11-14-2019, 10:19 AM | #346 | |
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11-14-2019, 10:34 AM | #348 | |
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Pisses me off enough just getting underneath the car. |
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11-14-2019, 10:49 AM | #349 |
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That's a feature I don't use. I actually forget that is there. I think when I do think about it, it is a bit cumbersome because my hands are way too full and my balance is affected when I go to use it. I do get your point though.
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11-14-2019, 01:01 PM | #350 |
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I noticed on mine to get that feature to work reliably I kick more on the driver side. If I do it right in the center, it only works some times. My car is weird.
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11-14-2019, 01:06 PM | #351 | |
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I'm waiting patiently to hear from my fabricator with some good news. Today is the slowest day ever haha. So much anticipation. Exhaust should be done today, but I'd rather it be earlier than later obviously. |
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11-14-2019, 05:24 PM | #352 | |
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Lets say before the OE crossover you simply place a 3" x 1 meter pipe on the longer side, is that sufficient? Or does it have to be as follows: 3" x 1 meter + 2.5" x .36 meter on short pipes 3" x 1 meter on long pipes The crossover pipes What about the pipe length prior to that section? Like the length leading back to downpipes? |
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