03-05-2024, 11:13 AM | #1 |
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2018 LCI (MT) catted downpipe choice for droning car....I know, again
Hey guys, hope everyone's well. Have a question that I'm sure had been beaten to death, regarding downpipe choice. My situation:
1. MPE exhaust produces drone around 3k, in the low 300 Hz range. Pretty head-rattling for long drives, if you choose to stay in 6th 2. Currently stage 1 tuned, Wagner Evo2 fmic, CTS intake. Want to tune to BM3 Stage 2, with cold start delete, CEL clear. Question: Would a catted downpipe make that 300HZ drone worse/louder? Is any particular brand that would slightly alter drone frequency? Everyone mentions "more character" or "deeper" sound, but no reference to drone instensity. Any advice would be appreciated. |
03-05-2024, 01:25 PM | #2 |
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Yes, if your current setup is on the stock cats and you are moving to a sport cat, any drone you have will be more noticeable. I have it on my setup running a Dinan exhaust and I have run several permutations of the setup:
1. full stock 2. stock cat and muffler with Dinan resonator delete. 3. sport cat with stock muffler and Dinan resonator delete. 4. sport cat with Dinan muffler and Dinan res delete (current setup) 5. sport cat with Dinan muffler and stock resonator. The current setup has the most drone, but I just deal with it and use a valve controller to keep the exhuast valve closed for most normal driving. |
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03-05-2024, 01:46 PM | #3 | |
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03-05-2024, 03:11 PM | #4 | |
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03-05-2024, 03:31 PM | #5 |
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03-05-2024, 03:52 PM | #6 | |
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03-05-2024, 05:36 PM | #7 |
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Honestly dude, you just gotta get of the MPE. I'm currently running a VRSF catless DP and Remus exhaust and the drone is honestly non-existent with valves closed. Way better than when I was running MPE with stock DP. Idk how BMW screwed up so badly on the MPE for this car lol (mine literally cracked off the car at one point)
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03-06-2024, 10:38 AM | #9 | |
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Would love to address the drone issue and if not successful, may just put on a 300cell DP and run it with valves closed. Should be around same dB level at drivers position. |
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03-06-2024, 10:41 AM | #10 |
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