Does after market exhaust system increase the fuel consumption

DK_ezbh · 11-08-2010, 03:35 AM

I am thinking about change my OEM exhaust to either Eisenmann - Performance or Akrapovic evolution.
Will changing to these two affect the fuel consumption. Which one do u perfer. Help me out!

Andrew 912 · 11-08-2010, 03:52 AM

Quote:

Originally Posted by DK_ezbh

I am thinking about change my OEM exhaust to either Eisenmann - Performance or Akrapovic evolution.
Will changing to these two affect the fuel consumption. Which one do u perfer. Help me out!

Akrapovic Evolution is the choice!

DK_ezbh · 11-08-2010, 03:57 AM

Quote:

Originally Posted by Andrew 912

Akrapovic Evolution is the choice!

I am inclined to that too buddy

mfeltiii · 11-08-2010, 09:42 AM

Will decrease MPH only because you will be on the gas more.

emthreeboy · 11-08-2010, 07:19 PM

I thought aftermarket exhaust + tune decrease the fuel consumption? But can someone correct me on this, could be wrong.

powertrip · 11-08-2010, 07:43 PM

A free flowing exhaust will increase the efficiency of the engine which results in an increase in fuel mileage. The problem is that most of don't actually see the increase due to our foots getting suddenly heavier

.

vividracing · 11-08-2010, 07:56 PM

Really depends on how much of the extra

factor you try to extract from your car.

No, seriously, from experience, the improved breathing and resulting increase in torque generally leads to an increase in gas mileage. There won't be much of a difference, maybe only 1 or 2 mpg, but you should notice an increase rather than a decrease.

Hope this helps,

Graeme

DK_ezbh · 11-09-2010, 01:26 AM

Thanks for sharing guys!

alpina527 · 11-09-2010, 02:55 AM

I noticed slightly worse consumption with my Akra Evo. I didn't have the tune though

J08M3 · 11-09-2010, 06:13 AM

In theory yes. In reality no

1SICKM · 11-09-2010, 06:19 AM

Why are you concerned about gas mileage?

1Cyrus · 11-09-2010, 09:14 AM

Quote:

Originally Posted by 1SICKM

Why are you concerned about gas mileage?

My thoughts exactly..correct me if I am wrong but this is the M3 forum...not the Prius forum..yes?...lol...kidding

J08M3 · 11-09-2010, 09:31 AM

Quote:

Originally Posted by 1SICKM

Why are you concerned about gas mileage?

seriously? you're asking this again?

Ryboy98 · 11-09-2010, 10:35 PM

For most....well at least for me and my brother this simple formula has always held true. Now please try to follow along because this is VERY technical.
MPG is inversely proportional to the dB output of my exhaust! which is also related to As the dB output of my exhaust increases it is directly proportional to the weight of my right foot!

Ry

DK_ezbh · 11-10-2010, 02:11 AM

Quote:

Originally Posted by 1Cyrus

My thoughts exactly..correct me if I am wrong but this is the M3 forum...not the Prius forum..yes?...lol...kidding

I am just curious. It is good to know, especially when ur friends ask u about that.

11-08-2010, 03:35 AM	#1
DK_ezbh Enlisted Member 13 Rep 30 Posts Drives: E93 M3 Join Date: Jun 2010 Location: Vancouver iTrader: (0)	Does after market exhaust system increase the fuel consumption I am thinking about change my OEM exhaust to either Eisenmann - Performance or Akrapovic evolution. Will changing to these two affect the fuel consumption. Which one do u perfer. Help me out!
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11-08-2010, 09:42 AM	#4
mfeltiii Second Lieutenant 10 Rep 262 Posts Drives: '10 AW E92 6mt Join Date: Jan 2010 Location: S. FLA iTrader: (1)	Will decrease MPH only because you will be on the gas more.
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11-08-2010, 07:19 PM	#5
emthreeboy Captain 38 Rep 917 Posts Drives: E92 M3 & E46 M3 Join Date: Oct 2010 Location: socal iTrader: (2)	I thought aftermarket exhaust + tune decrease the fuel consumption? But can someone correct me on this, could be wrong. __________________ -09 e92 SPACE GRAY/// m3 w/ m-dct! -06 E46 JET BLACK/// m3 6MT!
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11-08-2010, 07:43 PM	#6
powertrip Scared money don't make money. 81 Rep 1,446 Posts Drives: 2009 E92 M3 DCT Join Date: Apr 2009 Location: Irvine, CA iTrader: (3) Garage List 2009 E92 M3 [0.00]	A free flowing exhaust will increase the efficiency of the engine which results in an increase in fuel mileage. The problem is that most of don't actually see the increase due to our foots getting suddenly heavier . __________________ 2009 E92 M3/DCT/Alpine White/Fox Red/Carbon Leather OE Tuned 402 whp & 303 wtq/Gintani X-pipe/MXP Axle Back/Rogue Pulley/AFE Stage 2/Cosmetics By IND & EAS HUGE THANKS: Gintani, OE Tuning, and EAS
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11-08-2010, 07:56 PM	#7
vividracing 728 Rep 6,854 Posts Drives: E90 M3, F30 335i, F80 M3 Join Date: Aug 2006 Location: Arizona iTrader: (14)	Really depends on how much of the extra factor you try to extract from your car. No, seriously, from experience, the improved breathing and resulting increase in torque generally leads to an increase in gas mileage. There won't be much of a difference, maybe only 1 or 2 mpg, but you should notice an increase rather than a decrease. Hope this helps, Graeme
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11-09-2010, 01:26 AM	#8
DK_ezbh Enlisted Member 13 Rep 30 Posts Drives: E93 M3 Join Date: Jun 2010 Location: Vancouver iTrader: (0)	Thanks for sharing guys!
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11-09-2010, 02:55 AM	#9
alpina527 Banned 68 Rep 638 Posts Drives: 2008 E92 M3 DCT JZB/FR Join Date: Jan 2010 Location: London, England iTrader: (1)	I noticed slightly worse consumption with my Akra Evo. I didn't have the tune though
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11-09-2010, 06:13 AM	#10
J08M3 Major General 331 Rep 6,005 Posts Drives: 2011 M3 COUPE Join Date: May 2008 Location: NEW YORK iTrader: (8)	In theory yes. In reality no __________________
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11-09-2010, 06:19 AM	#11
1SICKM Major 122 Rep 1,328 Posts Drives: 2025 M3 Competition Join Date: Oct 2010 Location: Long Valley, NJ iTrader: (7) Garage List [0.00]	Why are you concerned about gas mileage?
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11-09-2010, 10:35 PM	#14
Ryboy98 Private First Class 33 Rep 177 Posts Drives: 2009 M3 Coupe Join Date: Feb 2010 Location: Florida iTrader: (11)	For most....well at least for me and my brother this simple formula has always held true. Now please try to follow along because this is VERY technical. MPG is inversely proportional to the dB output of my exhaust! which is also related to As the dB output of my exhaust increases it is directly proportional to the weight of my right foot! Ry __________________ *SOLD 3/2012 *2009 AW 6MT E92 M3 Gintani S/C Stage 2+ 606 WHP, 392TQ SAE Dynojet 93 Pump, Gintani cat-less x-pipe, Gintani Race rear. DPE SP-C16 20x9F, 20x10.5R Toyo T1R 255/30/20F 305/25/20R
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