Downpipes for E63S 4matic
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Joined: May 2005
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1991 964 Turbo, 2002 Black E55, 2002 Black E55 " The Beast"- 2014 E63s
I have Weistec a DP without any cats and I never get any smell, inside or outside of the car, ever and I have put at least 1500 miles so far. The car sounds and drives great
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Joined: Mar 2011
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From: Canada
2023 E63S Wagon
Can you smell at all?
Did you do turbo back with the Weistec mounts or the mid pipes?
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Joined: Mar 2011
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From: Canada
2023 E63S Wagon
Maybe.
Its the tone. Blaring. Volume wouldn’t bother me if it was just louder. But it’s the change in pitch/tone/whatever.
Maybe I need to just give it time. It’s not banshee and it’s not growl it’s now just … in the middle.
Its the tone. Blaring. Volume wouldn’t bother me if it was just louder. But it’s the change in pitch/tone/whatever.
Maybe I need to just give it time. It’s not banshee and it’s not growl it’s now just … in the middle.
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1991 964 Turbo, 2002 Black E55, 2002 Black E55 " The Beast"- 2014 E63s
MBWorld Fanatic!
Joined: Mar 2011
Posts: 2,507
Likes: 1,586
From: Canada
2023 E63S Wagon
I’m putting the stock exhaust back and downgrading to stage 1 tune. It’s too damn smelly, I can’t hack it. It’s worse then my old school cammed camaro was. I can’t even leave the car in the driveway, the smell goes in the garage still. I left it idling today and swear there was a 200ft eye watering bubble around the car. I could smell it as soon as I opened the front door to go outside.
My Kooks will be up for sale soon for those who are more hardcore!
My Kooks will be up for sale soon for those who are more hardcore!
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Joined: Oct 2013
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14 E63, 05 E55, 03 Evo 8, 08 F250, 06 R6R, 92 Talon TSI, and instability
I’m putting the stock exhaust back and downgrading to stage 1 tune. It’s too damn smelly, I can’t hack it. It’s worse then my old school cammed camaro was. I can’t even leave the car in the driveway, the smell goes in the garage still. I left it idling today and swear there was a 200ft eye watering bubble around the car. I could smell it as soon as I opened the front door to go outside.
My Kooks will be up for sale soon for those who are more hardcore!
My Kooks will be up for sale soon for those who are more hardcore!
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MBWorld Fanatic!
Joined: Mar 2011
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From: Canada
2023 E63S Wagon
I did get used to the noise! The part throttle rumble is great now. I’ll miss that and the cold start. WOT I can’t wait to be back to stock again it’s just rude lol.
I’ll never know how much slower or faster the car will be with or without cats since I’m still sorting it out. That makes me a little sad, leaving some horsepower on the table. Especially since my tuner says I can’t run E40 with cats
MBWorld Fanatic!
Joined: May 2005
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1991 964 Turbo, 2002 Black E55, 2002 Black E55 " The Beast"- 2014 E63s
I am not sure what's up with your car, but my car with catless DP doesn't smell at all, none. It is possible you might have some gasket leak or some like that, get it checked out. Also the sound with the DP is pure music, awesome and will not switch it for anything else
Super Member
Joined: Feb 2015
Posts: 617
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From: Canada
2019 911 GTS / 2016 X3 / 2015 E63s / 1993 RX-7
Every car I have had run without cats stinks! My RX-7 will make your eyes water, and your clothes definitely will smell like the car.
High flow cats (200 cell) have no smell
Unless running E40-85, or going for MAX power I will run at the minimum HFCs.
High flow cats (200 cell) have no smell
Unless running E40-85, or going for MAX power I will run at the minimum HFCs.
MBWorld Fanatic!
Joined: Mar 2011
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From: Canada
2023 E63S Wagon
This is the part the confuses me - don't regular cars like Ford etc. flex fuel cars have cats? Why are we told not to run cats with our E tunes?
MBWorld Fanatic!
Joined: Mar 2011
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From: Canada
2023 E63S Wagon
So update on all this I'm going to put up with the smell and do baby steps
1) make sure there are no leaks
2) get the car running right - I added the DP and BB intake and went slower, maybe cleaned up running right it will not smell as bad
3) if I'm still unhappy with the car running right, I'm going to add in some 3" high flow cats instead of going back to stock and see how that goes
Baby steps. Will keep you all posted.
1) make sure there are no leaks
2) get the car running right - I added the DP and BB intake and went slower, maybe cleaned up running right it will not smell as bad
3) if I'm still unhappy with the car running right, I'm going to add in some 3" high flow cats instead of going back to stock and see how that goes
Baby steps. Will keep you all posted.
Super Member
Joined: Feb 2015
Posts: 617
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From: Canada
2019 911 GTS / 2016 X3 / 2015 E63s / 1993 RX-7
The flex fuel vehicles do run cats, but I suspect (no evidence) that when run at the ragged edge that cat life will be decreased. My understanding is that it is the heat that kills the convertors, but I am not a chemist.
Even high flow cats offer some restriction, esp when tuning / aiming for max power. I noticed that when I went cat less on my RX-7 from high flow cats and experienced overboost situation where the wastegate could not handle the extra flow to control boost pressures. Going to an external wastegate that could manage the higher flows (less restriction) was the solution. So even a high flow cat offers restriction.
MBWorld Fanatic!
Joined: Mar 2011
Posts: 2,507
Likes: 1,586
From: Canada
2023 E63S Wagon
Idling
STFT1 1.6%
LTFT1 9.4% --- always higher then LTFT2
STFT2 0.8%
LTFT2 6.3%
WOT 4th gear
STFT1 5.5%
LTFT1 3.9%
STFT2 -2.3%
LTFT2 3.1%
Senior Member
Joined: Sep 2011
Posts: 302
Likes: 11
From: CA
E63 M157
So update on all this I'm going to put up with the smell and do baby steps
1) make sure there are no leaks
2) get the car running right - I added the DP and BB intake and went slower, maybe cleaned up running right it will not smell as bad
3) if I'm still unhappy with the car running right, I'm going to add in some 3" high flow cats instead of going back to stock and see how that goes
Baby steps. Will keep you all posted.
1) make sure there are no leaks
2) get the car running right - I added the DP and BB intake and went slower, maybe cleaned up running right it will not smell as bad
3) if I'm still unhappy with the car running right, I'm going to add in some 3" high flow cats instead of going back to stock and see how that goes
Baby steps. Will keep you all posted.
Super Member
Joined: Sep 2018
Posts: 961
Likes: 103
10-second E550
Try adding 3 gallons of E85, you'll be around E20. It really helps with the smell on a catless car. Right now I have 200 cell high flow catted downpipes on my M157, the smell is 80-90% gone when I'm on straight 91 octane. With 3 gallons of E85 mixed in, I can put my face right in front of the tailpipes & not smell anything lol
Member
Joined: Jun 2017
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Current: 2018 E63 Selenite Wagon (700hp/850tq) Prior: 2016 E63 Selenite Wagon (670hp/830tq on E30)
