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BMW 3-Series (E90 E92) Forum
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DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
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02-11-2012, 10:09 PM | #507 |
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I'm a new e90 owner. Just picked up a sedan with a sports package and 47K miles. I'm loving it.
Anyway, I owned an e36 M3 and it didn't have the flap, but the same year 328i had the flap. It was on the 328i for sound control and to make the cats warm up a little faster. I started my e90 cold and noticed for the first 40-50 seconds the flap was closed. I don't know if it closes back up or not. It could just be a cold start function. I know that there are no performance exhaust systems that have this. I didn't do either the ball bearing/golf tee or unplug the connector. Unplugging the connector may register a fault because you have opened the circuit. Whether or not it matters is another story. I went on eBay and did a search for the following after reading the first couple of pages: PINCH VALVE CLAMP I bought a couple for ~$3. I'll put it on the hose inside the panel in the trunk. |
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02-24-2012, 05:28 PM | #510 |
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2012 335i Convertible
Could someone please tell me how to do this on a 2012 335i Convertible? There's nothing like that on the drivers side of my car. There is only one cable that connects to the light.
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03-09-2012, 02:56 AM | #511 | |
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The alternative is to remove the vacuum line from the muffler itself. The original method. and plug or crimp that line. |
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03-11-2012, 10:26 PM | #512 | |
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Jake K 335i Mpower |
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03-26-2012, 11:50 AM | #515 |
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03-26-2012, 12:55 PM | #516 |
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The code showed up on my front display.
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04-18-2012, 11:41 AM | #517 |
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I just unplugged the connector on my 2009 335i sedan.
No error codes on dash board. Sound is sweet ! Its not ricey loud, but u can notice the difference ...its a more "classy loud" , if you will. Also, after mod, i can now hear the "woosh" of the turbos as they spool and that sounds amazing never heard this sound before prior to modding ! I took a short idling vid before / after mod.... ill put this up if u guys want ? |
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04-18-2012, 12:27 PM | #518 |
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I did it the old fashion way with my convertible. I unplugged the rubber tube near the driver side tailpipe and zip tied it in half to pinch it shut.
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04-20-2012, 12:20 AM | #519 | |
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04-23-2012, 07:46 AM | #521 |
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I love the difference in sound when unplugging the actuator, especially the gurgle on the decel. It will throw a hidden code, not a big deal. However, I've been dealing w/o2 sensor codes for some time and, after getting a carbon cleaning, changing plugs, and replacing all o2 sensors, I swear unplugging the actuator had something to do w/throw these codes. I've done all kinds of testing w/leaving it plugged vs unplugging and doing spirited driving under both circumstances and so far, 2wks later w/it plugged, the codes have not returned. Call it coincidental, but for me, there's some sort of link b/tween that actuator and the 02 codes. Oh, how I miss the sound, but oh how I can't stand getting those codes. I may wait another week or two and unplug it again, do some drives, and see if the codes come back. If they do, there's definitely a link. As for the golf-t mod and the clamp mod, I didn't notice any difference.
So, for those of you contemplating unplugging it - go for it! I'm running a stock setup w/catless downpipes and definitely noticed a difference in sound.
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04-23-2012, 03:23 PM | #522 |
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Is only one medical pinch clamp required to perform the mod this way?
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04-24-2012, 09:24 PM | #523 |
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Unplugged mine tonight... Definitely more aggressive! And no errors from what I can tell. E90 pre-lci 335xi btw. Easiest DIY I've ever done!
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05-02-2012, 02:17 AM | #524 |
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05-02-2012, 02:20 AM | #525 |
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05-02-2012, 07:32 PM | #526 |
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did this and got a service engine soon light after about 500 miles with it unplugged.
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Montego Blue E90 335i
7" VRSF IC | OFT Tune | DCI | RB PCV | Secondary CAT Delete & CYBA 3.75" Tips | M3 Front | Mtech Rear | CSL Trunk | 219M | KW V1 | AA CP |
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05-03-2012, 03:06 AM | #527 |
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Has to be a coincidence. Say you get a DINAN exhaust, which is endorsed by BMW and is covered under their manufacturer warranty. The DINAN exhaust has NO actuator flap and does not control which pipe exhaust comes out of. The actuator is mostly a sound dampener and slightly warms the cats up faster. After that the actuator is mostly for sound. Just my .02 but ready with firesuit.
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05-03-2012, 08:57 AM | #528 | |
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Montego Blue E90 335i
7" VRSF IC | OFT Tune | DCI | RB PCV | Secondary CAT Delete & CYBA 3.75" Tips | M3 Front | Mtech Rear | CSL Trunk | 219M | KW V1 | AA CP |
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