DRONE: Who's got it, who doesn't ?

BoostedBMW · 11-13-2007, 05:07 PM

^ The last I heard QTP still sucked, and their motors were still wearing out just as fast. I have heard good things from a few VW guys who use this though...

http://www.atpturbo.com/root/releases/release091004.htm

Its a little different though in the fact that it operates kind of like a wastegate off of a vac source, and it opens any time you go WOT.

Chowbow · 11-13-2007, 05:26 PM

Quote:

Originally Posted by BoostedBMW

^ The last I heard QTP still sucked, and their motors were still wearing out just as fast. I have heard good things from a few VW guys who use this though...

http://www.atpturbo.com/root/releases/release091004.htm

Its a little different though in the fact that it operates kind of like a wastegate off of a vac source, and it opens any time you go WOT.

Cool idea, thanks for the link. Something to consider for sure but I'm not sure if I want it to open up every time I go WOT...

BoostedBMW · 11-13-2007, 05:51 PM

Quote:

Originally Posted by Chowbow

Cool idea, thanks for the link. Something to consider for sure but I'm not sure if I want it to open up every time I go WOT...

Np... I wonder if you were to unplug the vac source if the valve would stay open or closed? I would assume that it would stay closed since it operates like a wastegate, but i'm not positive. It would be a PITA to plug and unplug it, but if you only wanted it for track days or every once and a while then it wouldn't be too bad.

edgarj · 11-13-2007, 10:46 PM

Quote:

Originally Posted by Magna3

You can't miss drone. It seems that at around 2K to 2500 rpm the exhaust frequency matches the cabins acoustics and the results are a deep resonance throughout the car. It's kind of like blowing air over the top of a beer bottle and getting the "fog horn" sound. It can make you downright sick to your stomach if it's loud enough.

Very nice description of "drone".... that's exactly the effect the Eisenmann Race kit produces in my car in the 2-3K rpm range.

Chowbow · 11-14-2007, 01:04 PM

Quote:

Originally Posted by BoostedBMW

Np... I wonder if you were to unplug the vac source if the valve would stay open or closed? I would assume that it would stay closed since it operates like a wastegate, but i'm not positive. It would be a PITA to plug and unplug it, but if you only wanted it for track days or every once and a while then it wouldn't be too bad.

Those ATP guys are in the Bay Area so I could go there and check it out / ask them. I actually had my S4 dyno'd there eons ago when they still had a dyno... Now I remember the shop and why that sounded familiar...

BMWdmk · 11-22-2007, 11:57 PM

Active Autowerk Cat Back!
No Drone!
AT!

BoostedBMW · 11-24-2007, 03:34 PM

I just put on my CP-E exhaust and I was really surprised that for as aggressive sounding as it is, the drone is very minimal. I know that everyone has a different tolerance for drone and it depends on how you drive, but to my ears there really isn't intrusive sounding at all when cruising at 65-70mph.

neilvosko · 05-22-2012, 07:19 AM

have the magnaflow touring for the 335i with AR downpipes (+oem 2nd cats) there is drone 1500-2000 rpm AT.

think will remove the secondary cats and replace with magnaflow 11379

BEAR-AvHistory · 05-22-2012, 09:07 AM

Has anyone actually dynoed a 335is before & after to see if the aftermarket exhausts do anything but make a power sound?

11-13-2007, 05:07 PM	#67
BoostedBMW Moderator 132 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	^ The last I heard QTP still sucked, and their motors were still wearing out just as fast. I have heard good things from a few VW guys who use this though... http://www.atpturbo.com/root/releases/release091004.htm Its a little different though in the fact that it operates kind of like a wastegate off of a vac source, and it opens any time you go WOT. __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
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11-22-2007, 11:57 PM	#72
BMWdmk Rollin 3rd 106 Rep 1,232 Posts Drives: Something fast Join Date: Sep 2007 Location: Chino Hills iTrader: (15)	Active Autowerk Cat Back! No Drone! AT!
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11-24-2007, 03:34 PM	#73
BoostedBMW Moderator 132 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	I just put on my CP-E exhaust and I was really surprised that for as aggressive sounding as it is, the drone is very minimal. I know that everyone has a different tolerance for drone and it depends on how you drive, but to my ears there really isn't intrusive sounding at all when cruising at 65-70mph. __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
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05-22-2012, 07:19 AM	#74
neilvosko Lieutenant Colonel 89 Rep 1,529 Posts Drives: 335i e92 FBO Join Date: Dec 2011 Location: miami iTrader: (19)	have the magnaflow touring for the 335i with AR downpipes (+oem 2nd cats) there is drone 1500-2000 rpm AT. think will remove the secondary cats and replace with magnaflow 11379
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05-22-2012, 09:07 AM	#75
BEAR-AvHistory 2020 Z4 M40i - 2022 M4C Convt 3129 Rep 5,264 Posts Drives: 2020 Z4 M40i - 2022 M4C Convrt Join Date: Jun 2011 Location: Raleigh, NC - OIB, NC iTrader: (0) Garage List 1965 COBRA (FFR rep ... [8.57] 2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00]	Has anyone actually dynoed a 335is before & after to see if the aftermarket exhausts do anything but make a power sound? __________________ Kevin Dravit Gray, Black Leather, Moonlight Roof, Red Calipers 2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT
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