Exhaust backfire?
Thread Starter
Instructor
Joined: Jun 2014
Posts: 154
Likes: 8
From: Greensboro NC
Exhaust backfire?
Hey guys, ever since I pulled fuse 41 in my c7, I have noticed a considerable amount of backfiring, sort of like a crackle and pop sound, coming from the exhaust as I let the car engine break. I like this sound a lot, just wondering why it happens, and more so why it only happens now after the fuse being pulled. Thanks guys!
Le Mans Master
Joined: Mar 2010
Posts: 7,050
Likes: 945
From: DFW TX
Hey guys, ever since I pulled fuse 41 in my c7, I have noticed a considerable amount of backfiring, sort of like a crackle and pop sound, coming from the exhaust as I let the car engine break. I like this sound a lot, just wondering why it happens, and more so why it only happens now after the fuse being pulled. Thanks guys!
They sound is amazing
Enjoy it. There is nothing wrong. If you did headers it would do it even more
Thread Starter
Instructor
Joined: Jun 2014
Posts: 154
Likes: 8
From: Greensboro NC
I agree, I love the sound. Also, thanks for the advice. May consider headers if they would increase the sound, but its already pretty damn loud lol I don't know how much louder I would want it to be!
Drifting
Joined: Jun 2013
Posts: 1,472
Likes: 33
From: Billings Montana
https://www.corvetteforum.com/forums...ck-result.html
Le Mans Master
Joined: Nov 2005
Posts: 6,099
Likes: 64
From: Houston TX
St. Jude Donor '09
It's called "burble" and mine does it in Sport mode most when the engine is still cold. Sweet music for sure.
A true "backfire" is rich gases in the exhaust igniting and sounds more like gunfire.
A true "backfire" is rich gases in the exhaust igniting and sounds more like gunfire.
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Drifting
Joined: Sep 2010
Posts: 1,581
Likes: 50
From: Prosper TX
Right you are! With my headers and x-pipe, definitely get it as well. Agree, nothing wrong, just more flow!
Thread Starter
Instructor
Joined: Jun 2014
Posts: 154
Likes: 8
From: Greensboro NC
on the 2014's, setting the engine sound management to "off" does not actually leave the baffles of the exhaust open all of the time. Pulling the fuse leaves them open 100% of the time
Last edited by Johniorio4; Apr 28, 2015 at 09:50 AM.
Advanced
Joined: Sep 2011
Posts: 72
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I see, I am just going by what I read for the 2015. Father In Laws car has a TPW of 5.4.2015, so I am trying to get as much figured out as I can
Safety Car
Joined: Jun 2008
Posts: 4,610
Likes: 427
From: USA
I have the Z51 which includes the multi mode exhaust in the 2015, but I didn't want to pull the fuse, because it took away the fact that it was a mode exhaust and just made it loud. I like showing it to others by putting it in tour mode, then changing to track so people can hear the difference when they want to see the car!
Tech Contributor
Joined: Jan 2006
Posts: 4,761
Likes: 240
From: Saint Louis MO
St. Jude Donor '14-'15
Pop and burble, as it's been called by the Euro community for years, is such a desirable trait these days that companies like BMW and Jaguar specifically have options for Active Exhaust that causes a fuel overrun. Jaguar actually charges for the option, and includes a button and a subsequent map for the overrun. Likewise, BMW and MINI Sport and Sport+ modes on M and JCW cars, respectively, enable overrun in the tune.
Side note, I actually asked my tuner to add additional overrun to my build, and I could feel his gaze through the e-mail. I see why, now that I can shoot a flame if need be.
I'd show you guys videos of my last WRC MINI, but 4-cylinders don't belong here. It's simply pop and burble ****. We re-wrote the ECU to essentially sound like an anti-lag without needing to replace turbos after every race (we used hybrid twins instead).
Side note, I actually asked my tuner to add additional overrun to my build, and I could feel his gaze through the e-mail. I see why, now that I can shoot a flame if need be.
I'd show you guys videos of my last WRC MINI, but 4-cylinders don't belong here. It's simply pop and burble ****. We re-wrote the ECU to essentially sound like an anti-lag without needing to replace turbos after every race (we used hybrid twins instead).