Twin Turbo and Tailpipes

Stinger · 07-20-2007, 10:16 AM

So, I was out driving yesterday and noticed a new 535xi pass me by and noticed how the tailpipes on the 5 series twin turbo version has the tailpipes all to one side. It kind of threw me as I have come to know the twin turbo by its two sided tailpipe treatment. Any thoughts on why BMW moved the pipes together on the 5? I doesn't look as sporty in my opinion. Does the V8 5-series split the pipes and that is a reason for visual distinctiveness?

ik999 · 07-20-2007, 10:20 AM

I think that they are doing it to make it look less sporty

My guess is that if it looks too 'sporty', it will compete with the 550i too much.

Similarly, they used the same pipe formation on the 135i.

Spool · 07-20-2007, 10:21 AM

Single set up works much better, reduce weight too...

HyperM3 · 07-20-2007, 10:35 AM

I read somewhere that the 5 series was the "classy" sports sedan in the lineup. They wanted to keep it subdued in the looks dept but still provide the grunt. A lot of their demographics dont want the look-at-me styling cues that the 335 has. Apparently thats why they do the dual design for the M cars. Its distinctive to those that want it to be look-at-me.

BK · 07-20-2007, 10:47 AM

No, the V8 5-series doesn't "split" the tailpipes either, nor does the 135i (already mentioned above). It's not like the N54 requires it. It's purely a cosmetic thing, whether it's all to one side or one on both sides.

FWIW, I think it looks better, more balanced, with one pipe on both sides, like the 335i. Our old Accord was like that, too. A huge number of cars have that same styling these days.

tjnptel1 · 07-20-2007, 10:48 AM

in that case, does it have a spare wheel?

ik999 · 07-20-2007, 11:11 AM

Quote:

Originally Posted by Spool

Single set up works much better, reduce weight too...

yeah, but wouldn't the weight be more balanced with one on each side?

japac1 · 07-20-2007, 11:14 AM

I personally like the split tail pipes.

Spool · 07-20-2007, 11:16 AM

Quote:

Originally Posted by ik999

yeah, but wouldn't the weight be more balanced with one on each side?

There would be a gas tank weight on that empty side, and your driver weight on the other to balance out...

sflgator · 07-20-2007, 11:30 AM

I believe the split dual tailpipe of the 335i makes for a less restrictive exhaust than the exhaust setup of the 535i and 135i.

ganeil · 07-20-2007, 12:29 PM

Quote:

Originally Posted by sflgator

I believe the split dual tailpipe of the 335i makes for a less restrictive exhaust than the exhaust setup of the 535i and 135i.

I believe engine power is rated with the exhaust system in place so if the 335i were less restrictive, the 335i would have higher hp rating than the others.

Stinger · 07-20-2007, 12:35 PM

Quote:

Originally Posted by japac1

I personally like the split tail pipes.

+1.

I was just curious if there is a design or engineering reason or some other opinions about it. Personally I think they did it to look less racer on the 5 series but that doesn't explain why they did it on the 135i. Hmmm...Oh well, it's still a great engine regardless of tailpipe placement.

BoostedBMW · 07-20-2007, 12:44 PM

Quote:

Originally Posted by Spool

Single set up works much better, reduce weight too...

Hmm... I don't see how it would work much better, it still has a dual exhaust that is being routed into a single muffler. Its not like an s2k or where a single exhaust is being branched off into two mufflers in stock form so when you convert to a single exhaust you see some significant gains.

Spool · 07-20-2007, 12:58 PM

Quote:

Originally Posted by BoostedBMW

Hmm... I don't see how it would work much better, it still has a dual exhaust that is being routed into a single muffler. Its not like an s2k or where a single exhaust is being branched off into two mufflers in stock form so when you convert to a single exhaust you see some significant gains.

Werd, maybe ur right on this stock system...i stand corrected

I was thinking more of a single larger turbo set up into a straight 3" exhaust...

Tonye90xi · 07-20-2007, 01:19 PM

Funny thing... I was driving past a 335xi the other day and I noticed the same thing. At first I thought it was a re-badge, but maybe it has something to do with the AWD? Any thoughts?

Edit: Just answered my own question. It was a re-badge I saw. I was just looking at some pics from a local meet and someone snapped the back of a 335xi and it had split tailpipes.

For my 2cents, I like having the split tailpipes on my 335i.

BoostedBMW · 07-20-2007, 02:09 PM

Quote:

Originally Posted by Spool

Werd, maybe ur right on this stock system...i stand corrected

I was thinking more of a single larger turbo set up into a straight 3" exhaust...

You must come from the JDM scene also... everytime I think of a turbo car I think of a 3" single exhaust.

iatacs19 · 07-20-2007, 02:11 PM

Any pictures of the underside for the 535i?

We can quickly tell if it's cosmetic or functional decision.

Spool · 07-20-2007, 02:16 PM

Quote:

Originally Posted by BoostedBMW

You must come from the JDM scene also...

Guilty

07-20-2007, 10:16 AM	#1
Stinger Major 112 Rep 1,040 Posts Drives: 2007 335i Convertible Join Date: Apr 2007 Location: Southern California iTrader: (1) Garage List 2007 335i E93 [7.00] 1993 318is [0.00] 1996 Z3 1.9 [0.00]	Twin Turbo and Tailpipes So, I was out driving yesterday and noticed a new 535xi pass me by and noticed how the tailpipes on the 5 series twin turbo version has the tailpipes all to one side. It kind of threw me as I have come to know the twin turbo by its two sided tailpipe treatment. Any thoughts on why BMW moved the pipes together on the 5? I doesn't look as sporty in my opinion. Does the V8 5-series split the pipes and that is a reason for visual distinctiveness? __________________ http://e93fanatic.blogspot.com
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07-20-2007, 10:20 AM	#2
ik999 Lieutenant 25 Rep 497 Posts Drives: e90 335i f32 435xi Join Date: Jul 2006 Location: gta iTrader: (0)	I think that they are doing it to make it look less sporty My guess is that if it looks too 'sporty', it will compete with the 550i too much. Similarly, they used the same pipe formation on the 135i.
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07-20-2007, 10:21 AM	#3
Spool ****** 558 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	Single set up works much better, reduce weight too... __________________ MKIV 6spd 1000hp Club
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07-20-2007, 10:35 AM	#4
HyperM3 Too many Alex's, from now on, call me Beaufort 342 Rep 6,188 Posts Drives: See Sig Join Date: Feb 2007 Location: Lawrenceville, NJ iTrader: (8)	I read somewhere that the 5 series was the "classy" sports sedan in the lineup. They wanted to keep it subdued in the looks dept but still provide the grunt. A lot of their demographics dont want the look-at-me styling cues that the 335 has. Apparently thats why they do the dual design for the M cars. Its distinctive to those that want it to be look-at-me. __________________ 13 HD FatBob 17 A4 Glacier/Black 1st Edition/Pre+/Sport/EurocodeTMD/Racechip 16 S6 (gone),14 S6 (gone),14 S6 (gone),13 S6 (gone),10 S4 (gone) 07 335i(gone)
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07-20-2007, 10:47 AM	#5
BK Smiling politely 165 Rep 7,931 Posts Drives: 330i Join Date: Feb 2006 Location: Washington DC iTrader: (0) Garage List 2006 330i [9.00]	No, the V8 5-series doesn't "split" the tailpipes either, nor does the 135i (already mentioned above). It's not like the N54 requires it. It's purely a cosmetic thing, whether it's all to one side or one on both sides. FWIW, I think it looks better, more balanced, with one pipe on both sides, like the 335i. Our old Accord was like that, too. A huge number of cars have that same styling these days. __________________ E90 330i Black Sapphire 6MT \| 991.1 C4 Platinum Silver 7MT
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07-20-2007, 10:48 AM	#6
tjnptel1 Cunning Linguist 147 Rep 2,219 Posts Drives: 335i Join Date: Apr 2007 Location: Norfolk, VA iTrader: (0) Garage List 2007 335i [0.00]	in that case, does it have a spare wheel? __________________ Bottles are for babies, Real men get blown.
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07-20-2007, 11:14 AM	#8
japac1 Major 21 Rep 1,100 Posts Drives: 2015 M4 Join Date: May 2007 Location: Keller, TX iTrader: (0) Garage List 2007 335xi [0.00]	I personally like the split tail pipes. __________________ [FONT="Garamond"]2007 E90 335 xi, Monaco Blue, Beige, Prem, Cold, Step, Navi, Sat, iPod
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07-20-2007, 11:30 AM	#10
sflgator Major General 148 Rep 5,389 Posts Drives: '09 MB C63 AMG & '08 MB GL450 Join Date: Oct 2006 Location: U.S. iTrader: (1)	I believe the split dual tailpipe of the 335i makes for a less restrictive exhaust than the exhaust setup of the 535i and 135i. __________________ \|2009 RENNtech MB C63 AMG \| Black/Black Leather/Black Maple \| Premium II \| MultiMedia \| iPod \| \| TeleAid \| Charcoal Filter Delete \| BMC High-Flow Air Filters \| High-Flow Secondary Cats \| Clear Side Markers \|
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07-20-2007, 01:19 PM	#15
Tonye90xi Private 0 Rep 51 Posts Drives: 2006 330xi Join Date: Dec 2006 Location: Long Island iTrader: (0)	Funny thing... I was driving past a 335xi the other day and I noticed the same thing. At first I thought it was a re-badge, but maybe it has something to do with the AWD? Any thoughts? Edit: Just answered my own question. It was a re-badge I saw. I was just looking at some pics from a local meet and someone snapped the back of a 335xi and it had split tailpipes. For my 2cents, I like having the split tailpipes on my 335i.
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07-20-2007, 02:11 PM	#17
iatacs19 Major General 459 Rep 5,319 Posts Drives: 2016 SO M4 Join Date: Sep 2006 Location: Washington, DC iTrader: (8)	Any pictures of the underside for the 535i? We can quickly tell if it's cosmetic or functional decision. __________________ If only BMWCCA Referral: 385628
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