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2010 2011 BMW 5 Series Forum F10 F10 N55 Open ended J Pipes mod |
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03-23-2016, 11:19 AM | #23 | |
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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03-23-2016, 03:11 PM | #24 |
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Great mod. Any HP/Tq gains?
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03-23-2016, 03:54 PM | #25 | ||
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2014 M5
1990 E30 318i Touring 1999 E38 728i -sold M235i - sold Activehybrid 5 - sold |
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03-23-2016, 04:30 PM | #26 | |
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11-10-2016, 10:57 AM | #27 |
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I just put a set of OEM M5 mufflers on and I have severe drone from 1500-2000 rpm. Does that sound right to you for OEM M5 mufflers?
Also, where did you get the J pipe done? What size piping did you use? I want to get this done ASAP. |
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11-10-2016, 09:08 PM | #28 |
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Low rpm has drone sound and then cleans up at about 22-2400rpm. The trick is to get an audio analyzer, jot down the frequency that is driving you crazy then use the helm holtz equation to mathematically come up with the length of the pipe that will cancel your drone sound. I used a 2" pipe off my 3". I ended up wanting more sound so I chopped one of the end caps of the j pipe and now it's perfect, to me.
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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11-10-2016, 10:04 PM | #29 | |
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11-10-2016, 10:33 PM | #30 |
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Car sound great and props for the unconventional method.
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Project Gamma Intakes / Project Gamma Catless Downpipes / Muffler Delete / DME Stage II Tune / H&R Springs |
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11-10-2016, 11:11 PM | #31 | |
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11-11-2016, 01:09 AM | #32 |
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Mikes performance muffler shop
221 W Florence Ave, Los Angeles, CA 90003 Juan is the owner and you should be able to get it done for under 200 maybe less. Bring cash. My annoying 110hz was this equation ( 1100 / 110hz ) / 4 ) x 12 = 30 inches This will vary for you depending on what frequency annoys you
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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11-11-2016, 11:04 AM | #34 | |
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11-11-2016, 11:54 AM | #35 | |
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11-11-2016, 05:01 PM | #36 |
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Well, decided to go in today and wow, I'm dissapointed I ever wasted money at any other exhaust shop. These guys knew what they were doing, no doubt about that.
The prior owner of my mufflers had welded on a 3 inch pipe due to him having a 550. Then the last muffler shop I went to had put on 3 different pieces just to transfer the 3 inch to my 2.25! Mike's Performance exhaust redid my piping with 1 smooth piece, re-welded the mufflers, and I got an x-pipe put on as well. The drone did not go away, so I then had them put on a 38 inch j pipe to target my peak 1800 rpm drone....and it worked!!! Exhaust is a little bassy/drony from 1000-1500, clears up completely till 2200, then the exhaust comes to life. I'm extremely pleased with the results. |
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11-11-2016, 06:07 PM | #37 | |
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I have a bass sound in that area too. Oh yeah pics!
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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11-11-2016, 06:09 PM | #38 |
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Put up pics
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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11-11-2016, 09:31 PM | #39 |
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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11-12-2016, 12:11 AM | #40 | ||
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11-12-2016, 12:13 AM | #41 |
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I unfortunately forgot to take more pics other than these. I'll snap some more shots later. I still dislike that 1000-1500 rpm drone. I'm wondering if I remove the permanently opened valves if it'll help.
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11-12-2016, 12:15 AM | #42 | ||
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11-12-2016, 11:32 AM | #43 | |||
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Magnaflo straight through mufflers 2 " j pipes with one closed and the other open And a mild burble exhaust tune with my DP. Without the DP the burble tune was more aggressive, but negated by the DP. Food for thought. Juan wanted to make me end caps for the j pipes that I could bolt on and off. Didn't go that route, but that's still on option for me. Another thought would be get the electronic exhaust valve. Juan sells them.
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535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
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11-12-2016, 11:37 AM | #44 |
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