Does a rear diffuser offer any practical utility?

jwarner · 03-06-2012, 02:51 PM

Just thinking out loud... does a rear diffuser do anything other than change the aesthetics/appearance of the car?

Raptor251 · 03-06-2012, 04:26 PM

Quote:

Originally Posted by jwarner

Just thinking out loud... does a rear diffuser do anything other than change the aesthetics/appearance of the car?

It gives you something to take pic of and post on the forum.

kscarrol · 03-06-2012, 04:36 PM

^

Z K · 03-06-2012, 04:39 PM

If you are racing, and it is actually a diffuser that is wind tunnel designed and tested, you can increase rear down force with a rear diffuser. It has a similar effect as having a rear spoiler.

Most aftermarket rear diffusers sold are cosmetic only.

tha_good_life · 03-06-2012, 05:03 PM

Quote:

Originally Posted by Raptor251

It gives you something to take pic of and post on the forum.

I love this response!

tibra1 · 03-06-2012, 05:07 PM

This is the only one that offers real function..unfortunatly on the street you would be more likely to leave it on the ground after after a dip or speed bump..

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M3PO · 03-06-2012, 05:27 PM

Quote:

Originally Posted by tibra1

This is the only one that offers real function..unfortunatly on the street you would be more likely to leave it on the ground after after a dip or speed bump..

Platte Forme A.G.'s diffuser system should provide some real utility as well.

HK8888 · 03-07-2012, 11:54 AM

Quote:

Originally Posted by tibra1

This is the only one that offers real function..unfortunatly on the street you would be more likely to leave it on the ground after after a dip or speed bump..

Attachment 654411

j2m · 03-07-2012, 02:38 PM

It actually has quite a bit of practicality. The fins on the rear of the diffuser act as a protector for the rear bumper as well as any other vehicle you might happen to back into. FOR INSTANCE 2 months after buying a $700 diffuser for my 335 I backed my car into my Caddy. Not a scratch on my caddy

although the carbon diffuser was totally effed

not a scratch on my 335's bumper

LarThaL · 03-07-2012, 04:53 PM

Will the diffuser hide any of the visibility of the exhaust can from the rear? I am talking about something like a Vorsteiner, etc.

03-06-2012, 02:51 PM	#1
jwarner Private 6 Rep 87 Posts Drives: 2011 E92 Alpine White ZCP Join Date: May 2011 Location: Bend, OR iTrader: (2)	Does a rear diffuser offer any practical utility? Just thinking out loud... does a rear diffuser do anything other than change the aesthetics/appearance of the car? __________________ Jason - Bend, OR 2011.5 E92 - Alpine White DCT ZCP Dinan: Exhaust, Intake, ECU, UD Pulley, Pedals; AFE: Air Scoops;
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03-06-2012, 04:36 PM	#3
kscarrol Brigadier General 8908 Rep 4,107 Posts Drives: 2021 X3 M40i, 1974 2002 Tii Join Date: Jun 2010 Location: Greenville, SC iTrader: (0)	^ __________________ 2021 X3 M40i 1974 2002tii, Inka, 5 sp manual BMWCCA # 327475
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03-06-2012, 04:39 PM	#4
Z K Major General 1889 Rep 5,506 Posts Drives: E90 M3, G20 M340i Join Date: Jul 2011 Location: San Francisco iTrader: (3)	If you are racing, and it is actually a diffuser that is wind tunnel designed and tested, you can increase rear down force with a rear diffuser. It has a similar effect as having a rear spoiler. Most aftermarket rear diffusers sold are cosmetic only. Last edited by Z K; 03-06-2012 at 04:49 PM..
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03-06-2012, 05:07 PM	#6
tibra1 Banned 127 Rep 6,773 Posts Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC iTrader: (4)	This is the only one that offers real function..unfortunatly on the street you would be more likely to leave it on the ground after after a dip or speed bump..
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03-07-2012, 02:38 PM	#9
j2m Colonel 180 Rep 2,446 Posts Drives: '11 E92 M3 DCT Join Date: Jun 2011 Location: Calgary, Ab iTrader: (8) Garage List 2011 BMW E92 M3 [10.00]	It actually has quite a bit of practicality. The fins on the rear of the diffuser act as a protector for the rear bumper as well as any other vehicle you might happen to back into. FOR INSTANCE 2 months after buying a $700 diffuser for my 335 I backed my car into my Caddy. Not a scratch on my caddy although the carbon diffuser was totally effed not a scratch on my 335's bumper __________________ 11' E92 M3 Space Grey \| DCT \| ESS VT2- 625 \| Gintani Race (valved) + Quad Res Catless X-Pipe \| KW Sleeve's \| GC Camber Plates\|Arkym Diffuser \| Vorsteiner VRS Lip \| P3 Boost Guage \| Stud Conversion PHOTO's: Click Here ESS VT2 625 PHOTOS: Click Here
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03-07-2012, 04:53 PM	#10
LarThaL Colonel 336 Rep 2,940 Posts Drives: 2011 M3 Join Date: Apr 2011 Location: West Springfield, MA iTrader: (0)	Will the diffuser hide any of the visibility of the exhaust can from the rear? I am talking about something like a Vorsteiner, etc. __________________ **Audi S6 Audi S3 * Porsche Cayman GTS* --Former BMW M3 owner**
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