Exhaust pops & bangs

[Leonardo]

When I was little... My dad used to light and throw firecrackers out of the car window! Kinda the OG "Pops n Bangs"!



This SH!T will get you arrested now... Good roll model Pops! No wonder I turned out like I did LOL!!!

[James H]

First of all I would to make it clear that I don't have a loud aftermarket exhaust on my BRZ! But I am puzzled as to why car makers are all over the crackle exhaust tune while governments are outlawing them. I know in Japan new cars have to have "quiet exhaust".
As for those who are being tortured by the fart can exhaust noise, I have a story to make you laugh. There is a Civic in my neighborhood with a really loud exhaust. The obnoxious driver likes to rev his engine at every stop sign. So one day I think one of the neighborhood kids (or adult) walking their dog must have picked up and put the dog poo in his exhaust. Man, the smell was so bad... the guy must have to wear a gas mask while driving.

[DarkPira7e]

Originally Posted by James H

But I am puzzled as to why car makers are all over the crackle exhaust tune while governments are outlawing them.

Imagine if car makers could charge the same amount for cars, without r&d costs to make them faster, or better - all they had to do was make it loud and people buy in droves?? If sound sells more than performance, we all end up losing. No doubt that a lot of people would buy a slow car that sounded "aggressive" before buying a fast but mature car

[Tcoat]

Originally Posted by James H

First of all I would to make it clear that I don't have a loud aftermarket exhaust on my BRZ! But I am puzzled as to why car makers are all over the crackle exhaust tune while governments are outlawing them. I know in Japan new cars have to have "quiet exhaust".
As for those who are being tortured by the fart can exhaust noise, I have a story to make you laugh. There is a Civic in my neighborhood with a really loud exhaust. The obnoxious driver likes to rev his engine at every stop sign. So one day I think one of the neighborhood kids (or adult) walking their dog must have picked up and put the dog poo in his exhaust. Man, the smell was so bad... the guy must have to wear a gas mask while driving.

The OEM "pops" are no where near what the people are tuning their cars for. It is all a matter of severity.


Jag


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


What I have to live with


[ame]https://www.youtube.com/watch?v=T3NckRHc0ao[/ame]


[ame]https://www.youtube.com/watch?v=Zd4yX89RKAM[/ame]

[NoHaveMSG]

Originally Posted by Tcoat

Fun part is that many tracks have very stringent restrictions on how loud your exhaust can be. The guys tuning for these pops have no clue what a track is of course.

None of my local ones do, but I can see it coming as urban area's creep in on them. It's the reason the stock cat back is still on my car.

I was behind a Genesis on track last year. It would back fire so hard on decel I thought something was wrong with my car.

[extrashaky]

My old Triumph would pop off like gunfire when unspent fuel hit the header. That wasn't the result of a tune. That was a function of twin carbs, a very aggressive camshaft and timing advance.

We didn't build it to do that. We built it for performance, and the sound was a side effect. I usually just drove it easy in residential areas to keep the volume down.

My exhaust was legal. I'm not sure how you outlaw pops that are a function of the engine in older carburetor hot rods with no computers. You'd basically just be outlawing hot rods altogether.

[Tcoat]

Originally Posted by extrashaky

My old Triumph would pop off like gunfire when unspent fuel hit the header. That wasn't the result of a tune. That was a function of twin carbs, a very aggressive camshaft and timing advance.

We didn't build it to do that. We built it for performance, and the sound was a side effect. I usually just drove it easy in residential areas to keep the volume down.

My exhaust was legal. I'm not sure how you outlaw pops that are a function of the engine in older carburetor hot rods with no computers. You'd basically just be outlawing hot rods altogether.

Don't think they will be the target and they are so few and driven so rarely that they really don't contribute to the issue. As you said many that have the pops due to legitimate performance reasons tend to drive a little more considerately where people may be bothered by the noise. The douches I have to deal with drive the complete opposite and make as much noise as they can in residential areas just for the fun of it.

[StraightOuttaCanadaEh]

Originally Posted by Tcoat

Coming soon? Already there I think.


https://www.cbc.ca/news/canada/toron...cles-1.5213389

Yeah being implemented officially in October I believe

[extrashaky]

Originally Posted by Tcoat

Don't think they will be the target and they are so few and driven so rarely that they really don't contribute to the issue.

But therein lies the problem with laws. They have unintended consequences. Hot rods don't contribute to the issue, but that won't stop an overzealous cop from pulling over a hot rod and giving the driver a fix-it ticket for pops that would require pulling the camshaft to "fix."

A similar unintended consequence happened in Pennsylvania. Idiots were taking the doors off trucks that weren't designed to go doorless and driving around like that. Crap would blow out of their open door holes, they lost the use of their side view mirrors and there were questions about crash safety.

So PA passed a law that outlawed removing the doors. The clear intent was to outlaw removing doors from vehicles that weren't designed for door removal, but the cops went nuts and started pulling over Wranglers for having their doors off. Wranglers are designed to have the doors removed. One guy posted that a cop staked out the exit of his neighborhood, pulled him over and gave him a ticket. When he turned around and went back home to reinstall the doors, waiting on his street for him was a second cop who pulled him over again in his own driveway to give him a second ticket.

I never assume that cops will use common sense. Most probably do. But most rattlesnakes don't want to bite you, either.

[Tcoat]

Originally Posted by extrashaky

But therein lies the problem with laws. They have unintended consequences. Hot rods don't contribute to the issue, but that won't stop an overzealous cop from pulling over a hot rod and giving the driver a fix-it ticket for pops that would require pulling the camshaft to "fix."

A similar unintended consequence happened in Pennsylvania. Idiots were taking the doors off trucks that weren't designed to go doorless and driving around like that. Crap would blow out of their open door holes, they lost the use of their side view mirrors and there were questions about crash safety.

So PA passed a law that outlawed removing the doors. The clear intent was to outlaw removing doors from vehicles that weren't designed for door removal, but the cops went nuts and started pulling over Wranglers for having their doors off. Wranglers are designed to have the doors removed. One guy posted that a cop staked out the exit of his neighborhood, pulled him over and gave him a ticket. When he turned around and went back home to reinstall the doors, waiting on his street for him was a second cop who pulled him over again in his own driveway to give him a second ticket.

I never assume that cops will use common sense. Most probably do. But most rattlesnakes don't want to bite you, either.

Well this really shouldn't change anything since most laws already in existence state that the car is not to be altered to create excessive noise. They don't need a new law to deal with tuned in pops they just need to enforce the one that already exists.

[CrowsFeast]

@Tcoat
I suspect the Jags have some amount of adjustment available to them and that video must be on a lower setting (or possibly just does it less with the engine cold?). They're definitely more obnoxious than that driving around Toronto.

The other videos appear to be primarily anti-lag and 2 step; both of which have their roots in racing but now get abused by the hard-parking community.

Anti lag started within rally (group B I believe) and does exactly what it says. They send unburnt fuel through the hot turbo, it explodes and keeps the turbo spooled up (also terrible for reliability; but these were full on race cars with major sponsorship budgets).

2 step is from drag racing starts and I'm less familiar with it. The cars have a 'second' lower rev limiter for launches and I'm not entirely certain if the 'pops and bangs' are from ignition cuts to maintain that RPM (no spark, unburnt fuel hits hot exhaust, pops and bangs) or if it is also spooling the turbo while you're not at peak RPM (anti-lag style) or if it's possibly both.

Neither has any valid use on the street however.
(I do not like the hard parking community)

[Tcoat]

Originally Posted by CrowsFeast

@Tcoat
I suspect the Jags have some amount of adjustment available to them and that video must be on a lower setting (or possibly just does it less with the engine cold?). They're definitely more obnoxious than that driving around Toronto.

The other videos appear to be primarily anti-lag and 2 step; both of which have their roots in racing but now get abused by the hard-parking community.

Anti lag started within rally (group B I believe) and does exactly what it says. They send unburnt fuel through the hot turbo, it explodes and keeps the turbo spooled up (also terrible for reliability; but these were full on race cars with major sponsorship budgets).

2 step is from drag racing starts and I'm less familiar with it. The cars have a 'second' lower rev limiter for launches and I'm not entirely certain if the 'pops and bangs' are from ignition cuts to maintain that RPM (no spark, unburnt fuel hits hot exhaust, pops and bangs) or if it is also spooling the turbo while you're not at peak RPM (anti-lag style) or if it's possibly both.

Neither has any valid use on the street however.
(I do not like the hard parking community)

Oh there is no doubt there are legit reasons for pops. These d1ckwads don't have them though since the fastest they drive is down to the local Tim Hortons to sit around and rev the crap out of their cars.

[extrashaky]

Originally Posted by Tcoat

Oh there is no doubt there are legit reasons for pops. These d1ckwads don't have them though since the fastest they drive is down to the local Tim Hortons to sit around and rev the crap out of their cars.

How impolite. Here I was thinking Canadians were more considerate than that.

[bcj]