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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > BMW Performance Exhaust or Dinan Free Flow Exhaust?



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      10-08-2012, 11:15 PM   #23
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Does the n54 pop and make noises with the pe and ppk? I have an 08 335. Or just the n55 does it?
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      10-08-2012, 11:37 PM   #24
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^^^ Absolutely! Pop burble and crackle. Simply addictive. Anyone "tired" of their ride and want to reinvigorate it, the BMW PE is the way to go.
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      10-09-2012, 12:50 AM   #25
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Quote:
Originally Posted by tizzyd View Post
as another reference...here is my old 335 with the pe

Thanks for the videos! They really both sound great.
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      10-09-2012, 11:54 AM   #26
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BMW PE. My car sounds like sex
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      10-09-2012, 11:58 AM   #27
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both sound excellent!
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      10-10-2012, 02:41 PM   #28
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Quote:
Originally Posted by upstatedoc View Post
you're the first member i've heard say you have drone with the PE.
There's definitely drone "low frequency faint humming noise as if you were playing a bass note on repeat, not rattle sounds" with the PE on low revs ~2K on freeway compared to stock, noticeable but not terrible.

Mine was dealership installed and I also had LTBMW checked it out (they didn't see anything wrong with the install) and they've said it's normal for an AT with PE to drone.

I would be fine if the drone is very faint. However, the drone actually gets quite loud when you're going uphill or under load and going uphill at >60 MPH and maintain around the 2K rev range. I used a sound meter and the cabin noise level went from ~68 dB (freeway cruising) to ~80 dB. It's loud enough that I had to turn up my music to compensate for it. Downshifting the gear in DS mode reduced the drone, but it's still audible.

Out of all the mods (FMIC, ER Oil Cooler + CP, BMW PPK 2, BMW PS, Wavetrac LSD and BMW PE) that I have done so far, I have to say BMW PE is the most disappointing mod for my car. I have an 2010 E90 335i AT (N54).

If you're not sensitive to droning noises, then PE is actually a decent upgrade. My friends noticed the difference the day I switched from stock to PE and the rev sound >3K range is actually fairly exotic.

Anyhow, enough of the rant. I might actually convert back to stock soon or see if I can get the 335is muffler retrofitted to my E90.
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      10-11-2012, 01:11 AM   #29
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I love my BMW PE
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      10-11-2012, 08:47 AM   #30
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i love my PE.. it was quite loud when i first had it installed. but after about a week or so when it started breaking in. it got more refined. its still loud when you step on it a little but it can be quite while just cruising around.. also it makes amazing rumble sounds and you will love it in garages and tunnels!
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      10-11-2012, 09:32 AM   #31
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It's been my experience that automatic cars are more susceptible to drone because of the nature of the torque converter keeping the rpms in the 2K-3K zone during cruising. My Dinan FF doesn't drone at all, and wife's PE (on 128 convertible) doesn't either - but we both have 6MT. Previous cars with automatic and modified exhaust seemed to have a "sweet spot" of sorts where the drone was quite noticeable, and the same car with a manual trans had very little drone.
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