Exhaust crackle - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

James H · 04-08-2019, 02:36 PM

I heard so many of the newer cars with loud crackle exhaust sound. Over the weekend, I heard this on a Jag F-Type, 911 and Ford Fusion ST. How do manufacturer do this? I recall reading something about they program added drops of fuel to go into the exhaust and detonate for the loud crackle pop sound. Any engineers amongst us to explain this to me.

Timmy_Jones · 04-09-2019, 10:21 AM

And with many aftermarket tunes they can increase the volume and number of pops and crackles...I own a Focus RS and my tune has the additional pops. Its incredibly loud and borderline annoying. The boxer rumble is a much nicer noise than backfires and pops (yes, coming from a Focus RS owner)

Tcoat · 04-09-2019, 10:40 AM

You mess with timing and add extra fuel. Some engines can deal with it better than others. Many will argue but my statement is it is a bad idea with the boxer engines in these cars. They are not designed to deal with it and you are just inviting problems.

I am also biased though since last month a bunch of BMW "tuner" bros moved into the house 3 doors down from me. I am sick and tired of listening to cheap ass fart can exhausts and cars tuned to make noise but not perform going POP POP POP POP at all hours of the day and night. My car is not quiet but damn those things are annoying.

DarkPira7e · 04-09-2019, 11:04 AM

It's ignition retard on the exhaust side during decel usually. It also gets old quick, like having grilled cheese for lunch and dinner for a week. Except with this, you're making everyone else around you eat grilled cheese at the same time you do.

Tcoat · 04-09-2019, 11:17 AM

Quote:

Originally Posted by DarkPira7e

It's ignition retard on the exhaust side during decel usually. It also gets old quick, like having grilled cheese for lunch and dinner for a week. Except with this, you're making everyone else around you eat grilled cheese at the same time you do.

DUDE it is 2019 you mean the ignition is "developmentally challenged"!

wolffbite · 04-09-2019, 11:21 AM

I think the exhaust crackles and pops can be fun sounding when ripping around, but it would drive me nuts if it was going on the entire time I was driving.

Delicious tuning has a pops & bangs map that you can turn on and off in the car as you wish. https://www.delicioustuning.com/PNB

Seems like an ideal solution to get fun sounds that can be turned off when you don't want to piss off neighbors/police.

Shark_Bait88 · 04-09-2019, 11:47 AM

I've gotten crackles and pops on downshifts when I had a muffler delete

Gunman · 04-09-2019, 12:35 PM

The only pops and crackles I'd ever go out of my way to add to a car

#LeadSled

[ame]https://www.youtube.com/watch?v=_0CbESTJORY[/ame]

bfrank1972 · 04-09-2019, 12:53 PM

Quote:

Originally Posted by Tcoat

DUDE it is 2019 you mean the ignition is "developmentally challenged"!

Yeah... as a dad with a daughter on the autism spectrum I'd appreciate keeping the developmental humor to a minimum, thank you, cheers

Tcoat · 04-09-2019, 01:07 PM

Quote:

Originally Posted by bfrank1972

Yeah... as a dad with a daughter on the autism spectrum I'd appreciate keeping the developmental humor to a minimum, thank you, cheers

As a Dad with a son that has advanced OPD (Obsessive personality disorder) which has been barely controlled by medication for the last 20 years I find nothing offensive in a casual joke that is not directed at an individual. You deal your way and let me deal in mine OK?

HKz · 04-09-2019, 01:33 PM

if you have the TRD exhaust, you'll hear a pop/crackle once a while ^^

Tcoat · 04-09-2019, 01:36 PM

Quote:

Originally Posted by HKz

if you have the TRD exhaust, you'll hear a pop/crackle once a while ^^

Little. More of a burble that the pops that people are after. When I think of "pops" I am thinking more the rapid backfire type sound.

HKz · 04-09-2019, 01:42 PM

Quote:

Originally Posted by Tcoat

Little. More of a burble that the pops that people are after. When I think of "pops" I am thinking more the rapid backfire type sound.

yep it certainly isn't in the same league as F-RS & bimmer pops but I do get a pretty respectable pop on some downshifts

j3rf · 04-09-2019, 01:49 PM

Quote:

Originally Posted by Shark_Bait88

I've gotten crackles and pops on downshifts when I had a muffler delete

Yep, I get crackles and pops at partial throttle on deceleration with my muffler delete.

04-08-2019, 02:36 PM	#1
James H Senior Member Join Date: Mar 2019 Drives: 2017 BRZ Location: Newmarket Posts: 153 Thanks: 14 Thanked 127 Times in 66 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Exhaust crackle I heard so many of the newer cars with loud crackle exhaust sound. Over the weekend, I heard this on a Jag F-Type, 911 and Ford Fusion ST. How do manufacturer do this? I recall reading something about they program added drops of fuel to go into the exhaust and detonate for the loud crackle pop sound. Any engineers amongst us to explain this to me.

04-09-2019, 10:40 AM	#3
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,284 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	You mess with timing and add extra fuel. Some engines can deal with it better than others. Many will argue but my statement is it is a bad idea with the boxer engines in these cars. They are not designed to deal with it and you are just inviting problems. I am also biased though since last month a bunch of BMW "tuner" bros moved into the house 3 doors down from me. I am sick and tired of listening to cheap ass fart can exhausts and cars tuned to make noise but not perform going POP POP POP POP at all hours of the day and night. My car is not quiet but damn those things are annoying. __________________ Racecar spelled backwards is Racecar, because Racecar.

04-09-2019, 11:47 AM	#7
Shark_Bait88 Senior Member Join Date: Jun 2014 Drives: 2013 Firestorm FR-S Location: Midwest Posts: 1,348 Thanks: 1,670 Thanked 862 Times in 480 Posts Mentioned: 12 Post(s) Tagged: 2 Thread(s)	I've gotten crackles and pops on downshifts when I had a muffler delete __________________ "Shark_Bait88, the man who’s spent the most money modding his stock FR-S and it’s still stock." -@jdnguyen

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04-09-2019, 10:21 AM	#2
Timmy_Jones Spun Join Date: Mar 2013 Drives: 17' Focus RS Location: New England Posts: 1,179 Thanks: 396 Thanked 400 Times in 273 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	And with many aftermarket tunes they can increase the volume and number of pops and crackles...I own a Focus RS and my tune has the additional pops. Its incredibly loud and borderline annoying. The boxer rumble is a much nicer noise than backfires and pops (yes, coming from a Focus RS owner)

04-09-2019, 11:04 AM	#4
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,934 Thanks: 3,200 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	It's ignition retard on the exhaust side during decel usually. It also gets old quick, like having grilled cheese for lunch and dinner for a week. Except with this, you're making everyone else around you eat grilled cheese at the same time you do.

04-09-2019, 11:21 AM	#6
wolffbite Just the tip Join Date: Mar 2017 Drives: 2017 DGM BRZ Location: BC, CANADA Posts: 630 Thanks: 912 Thanked 875 Times in 376 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I think the exhaust crackles and pops can be fun sounding when ripping around, but it would drive me nuts if it was going on the entire time I was driving. Delicious tuning has a pops & bangs map that you can turn on and off in the car as you wish. https://www.delicioustuning.com/PNB Seems like an ideal solution to get fun sounds that can be turned off when you don't want to piss off neighbors/police.

04-09-2019, 01:33 PM	#11
HKz Reformed Join Date: Sep 2014 Drives: '23 GRC, '11 Prius, '04 RAV4 Location: Mesa, AZ Posts: 1,313 Thanks: 1,234 Thanked 1,133 Times in 588 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	if you have the TRD exhaust, you'll hear a pop/crackle once a while ^^

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