Smokes at high RPM shiftting

sameh · 02-14-2011, 04:55 AM

We are always driving our beloved M3s and don't get much chance watching it running. Yesterday it happened that my girlfriend was following me and in a traffic light she was behind me and asked me to do 0-60 and happily I did only to hear her on the phone saying smoke. Apparently shifting from 1st to second at high RPM makes smoke (exhaust not black) explode out of the the 4 pipes. According to her, it was IMPRESSIVE. That I wanna see!!
And that makes me wonder, would that also happen with every rev-matching throttle blips??

FLOSS M · 02-14-2011, 04:24 PM

Are you sure it was not tire smoke - the DCT will spin the tires from first to second at 8400 rpm shifts. You can feel it inside the car, the whole car shakes!

sameh · 02-14-2011, 04:29 PM

Quote:

Originally Posted by DDS335i

Are you sure it was not tire smoke - the DCT will spin the tires from first to second at 8400 rpm shifts. You can feel it inside the car, the whole car shakes!

That was the first thing I asked her "are u sure it wasn't coming from the tires?" and when she sounded confident the smoke was coming out of the exhaust tails I then asked if it was black smoke or just regular exhaust smoke.

Erhan · 02-14-2011, 04:33 PM

Watched a lot of m3 tests, assuming they go wot all the time, i don't remember seeing any smoke.

That being said, if the outside temps are low, then you'll see a lot of smoke, from pretty much any car at wot.

OC3 · 02-14-2011, 04:44 PM

Quote:

Originally Posted by sameh

That was the first thing I asked her "are u sure it wasn't coming from the tires?" and when she sounded confident the smoke was coming out of the exhaust tails I then asked if it was black smoke or just regular exhaust smoke.

Do everyone a favor and ask a guy to check it out, plz. Wimmin's mind work differently, as well as their visual system...

mrkbbd · 02-15-2011, 12:29 AM

I mean, it's quite possible it's from a backfire (think Ferrari shifting), the fuel is still on when the shift is happening (so too much fuel goes through the system and is exhausted where it catches fire due to the heat), the cats put it out and the smoke comes out the tail pipes

kpneverdies · 02-15-2011, 01:03 AM

u just started up the car? i see smoke comes out in the morning when i start up the car.

shagkie · 02-15-2011, 05:44 AM

Quote:

Originally Posted by sameh

We are always driving our beloved M3s and don't get much chance watching it running. Yesterday it happened that my girlfriend was following me and in a traffic light she was behind me and asked me to do 0-60 and happily I did only to hear her on the phone saying smoke. Apparently shifting from 1st to second at high RPM makes smoke (exhaust not black) explode out of the the 4 pipes. According to her, it was IMPRESSIVE. That I wanna see!!
And that makes me wonder, would that also happen with every rev-matching throttle blips??

My friend driving behind my car also saw smoke coming from my exhaust at one point. Before anyone else asks, yes my friend is a guy and a car nut too.

ChrisK · 02-15-2011, 05:47 AM

It may not be smoke, but steam. Moisture in the exhaust system - evaporating.

jonasaurus · 02-15-2011, 06:09 AM

Quote:

Originally Posted by ChrisK

It may not be smoke, but steam. Moisture in the exhaust system - evaporating.

+1

klammer · 02-15-2011, 07:53 AM

Let me know when it shoots out fire

02-14-2011, 04:55 AM	#1
sameh Lieutenant Colonel 172 Rep 1,530 Posts Drives: 2015 Porsche 911S Join Date: Aug 2010 Location: Texas iTrader: (0)	Smokes at high RPM shiftting We are always driving our beloved M3s and don't get much chance watching it running. Yesterday it happened that my girlfriend was following me and in a traffic light she was behind me and asked me to do 0-60 and happily I did only to hear her on the phone saying smoke. Apparently shifting from 1st to second at high RPM makes smoke (exhaust not black) explode out of the the 4 pipes. According to her, it was IMPRESSIVE. That I wanna see!! And that makes me wonder, would that also happen with every rev-matching throttle blips?? __________________ 2011 E92 JB/BL/DCT--->80K Miles 2015 F80 SS/SO/DCT?->28K Miles 2015 Porsche 911S
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02-14-2011, 04:24 PM	#2
FLOSS M ///M3 388 Rep 1,125 Posts Drives: 22 M3 X-Drive Join Date: May 2008 Location: NJ iTrader: (1)	Are you sure it was not tire smoke - the DCT will spin the tires from first to second at 8400 rpm shifts. You can feel it inside the car, the whole car shakes!
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02-14-2011, 04:33 PM	#4
Erhan Colonel 87 Rep 2,464 Posts Drives: Cooper S Join Date: Oct 2008 Location: Seattle iTrader: (0)	Watched a lot of m3 tests, assuming they go wot all the time, i don't remember seeing any smoke. That being said, if the outside temps are low, then you'll see a lot of smoke, from pretty much any car at wot. __________________ 2011 MINI Cooper S previous cars: E92 M3, Z4MC, Z4 Roadster, E36 328 Sedan
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02-15-2011, 12:29 AM	#6
mrkbbd Lieutenant 10 Rep 483 Posts Drives: e92 M3 DCT Join Date: Oct 2009 Location: VA/FL iTrader: (0) Garage List 2008 Mercedes E63AMG [0.00] 2009 M3 [0.00]	I mean, it's quite possible it's from a backfire (think Ferrari shifting), the fuel is still on when the shift is happening (so too much fuel goes through the system and is exhausted where it catches fire due to the heat), the cats put it out and the smoke comes out the tail pipes __________________ 2006 e53 X5 4.8is (sold) 2009 e92 M3 2008 E63 AMG
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02-15-2011, 01:03 AM	#7
kpneverdies First Lieutenant 31 Rep 354 Posts Drives: AW M3 E92 2010 Join Date: Apr 2010 Location: Hawaii iTrader: (0)	u just started up the car? i see smoke comes out in the morning when i start up the car.
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02-15-2011, 05:47 AM	#9
ChrisK Major General 4470 Rep 7,589 Posts Drives: '19 M2C Join Date: Jun 2007 Location: Chicagoland iTrader: (7) Garage List 2019 BMW M2C [7.00] 2015 Porsche Macan S [0.00]	It may not be smoke, but steam. Moisture in the exhaust system - evaporating. __________________ www.ReTuneTheDeTune.com 2019 M2 Competition (Sunset Orange)
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02-15-2011, 07:53 AM	#11
klammer Brigadier General 99 Rep 3,246 Posts Drives: 11 spc gry m3 e90, 19 X5 Join Date: Jan 2010 Location: chicago iTrader: (0)	Let me know when it shoots out fire __________________ mods: track ready stuff
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