Exhaust banging on modified cars - whats the point?

shifty_uk · 8 Aug 2020 at 17:12

Each to their own, we all have individual preferences, I get it but I’d like to understand what real world benefits these noises have or are a result of elsewhere in the engine.

I’m talking specifically about the stupidly loud banging and cracking every time someone lifts their foot off the accelerator on a tuned Fiat 500 or A3, for example; Not the beautiful burble of a C63.

To me, it sounds like the engine is a mile away from blowing up.

Do these noises add extra BHP points or is it just a look at me thing?

/oldman

muon · 8 Aug 2020 at 17:13

The unburnt fuel adds extra BHP.

The burbles you have are equally fake, so not sure you can complain about one and say the other is okay.

Nasher · 8 Aug 2020 at 17:34

Someone local has a Fiesta which does it excessively, not even a hot Fiesta just a 1.0. It sounds broken.

Hyburnate · 8 Aug 2020 at 17:35

To be fair mine only pops when you get to the red

Meaker · 8 Aug 2020 at 17:38

It comes from rally where the timing is retarded when you let off the accelerator so the fuel is still combusting as it leaves the cylinder. This causes high pressure in the exhaust which keeps the turbo spooled for your next hit on the accelerator.

Not great for your cats cats obviously.

Hyundai do claim to use it for performance too.

Otherwise it's just for noise.

Finglonga · 8 Aug 2020 at 17:38

Crackle tunes specifically designed map to crackle pop and bang on the overrun, completely different to the DSG farts that happen only when giving it beans. I can imagine they get very tiresome to drive with that constant din going on.

Raymond Lin · 8 Aug 2020 at 17:40

It’s ALIVEEEeeeeeeeeeeeeeeeeeeeeee

Terminal_Boy · 8 Aug 2020 at 17:41

It’s so that blind people can join in the Spot The Moron game as well.

paradigm · 8 Aug 2020 at 17:42

muon said:
The unburnt fuel adds extra BHP.

The burbles you have are equally fake, so not sure you can complain about one and say the other is okay.

Fake?

My TT burbles on overrun, none of the sound it makes is faked in any way.

sideways14a · 8 Aug 2020 at 17:49

My 5 is loud but doesnt pop bang or fart unless you hit limiter.

bainbridge · 8 Aug 2020 at 18:02

Cos machine gun tune innit

Kenai · 8 Aug 2020 at 18:15

Crackle map innit fam

Vrooooom Popopopopopopopopopopopopop

iamdjdz · 8 Aug 2020 at 18:16

I'm a member of an Abarth owners Facebook group and its constantly hounded by people asking for 'pops and bangs' maps on the cars. Personally don't see the point, if you get a pop on overrun great if not no point simulating it all the time.

Rimsy · 8 Aug 2020 at 18:20

It’s not half as annoyingly retarded as the “whooooosh” noise some local scrote has added to his crappy little polo every time he changes gear.
Basically sounds like a female tennis player groaning when he drives down the street. What the hell is that all about?

agw_01 · 8 Aug 2020 at 18:27

"All I want is pops and bangs"

Reminds me of this for some reason! NSFW!?

Toothy1911 · 8 Aug 2020 at 18:30

A well tuned car will pop on the over-run, and it does sound good. But pop and bang maps are a bit silly. Seems to be because everything a turbo these days. Are the exhausts hotter or something that allows unburnt fuel to burn?
Anti-lag is the proper way to do it and serves a purpose.

SonicSW20 · 8 Aug 2020 at 18:33

paradigm said:
Fake?

My TT burbles on overrun, none of the sound it makes is faked in any way.

It's fake in the sense that it is mapped to make that noise on purpose, and its only purpose is people like the noise.

Toothy1911 · 8 Aug 2020 at 18:36

agw_01 said:
"All I want is pops and bangs"

Reminds me of this for some reason! NSFW!?

Hilarious. What a pair of wallys. He's ruined that car with that map.
Really dislike LLF stuff. Bloke likes to think he's a lot better than he is. Most of the stuff I've seen is cringeworthy.

agw_01 · 8 Aug 2020 at 18:38

Toothy1911 said:
A well tuned car will pop on the over-run, and it does sound good. But pop and bang maps are a bit silly.

+1

Random pops and bangs on overrun sound great IMO, doesn't happen every time and occurs at different points of the rev range.

Lifting off and having your car emulate an AK-47... And wheres it's repeatable time and time again... That mod should be 'deleted'

WorTortle · 8 Aug 2020 at 18:42

It's a god awful waste of fuel. Constantly seeing/hearing kids in their early 20s driving around in low gear to keep "dem popzandbangz" going as they drive around residential areas.

Sounds terrible and just highlights the people who are going to drive around like a loon. Same goes with ridiculous dump valves too.

I'll allow it on rally cars as it serves a functional purpose.