Caporegime
Benefits? I don't think there are any.
Exhaust banging on modified cars - whats the point?
- Thread starter shifty_uk
- Start date
Soldato
There is no performance reason, it happens because there is excess fuel...because the ECU/Carb/whatever is expecting to need to use a large amount of fuel but you've suddenly closed throttle so it dumps in more than is required and excess goes into the exhaust.
Caporegime
Absolutely hate the whole pop bang map that seems to be prevalent in this day and age.
Where I live there is a young fella, just recently got himself a normal golf but he’s had it wrapped with a great big yellow stripes in the middle of the car. Looks kinda nice I guess, not my cup of tea. But this retard has somehow managed to get a pop and bang map on his car and it sounds horrendous.
During the day I don’t mind it but **** sakes in the middle of the night when me and the missus are trying to sleep and this idiot is bombing it up and down our road with his crappy sounding exhaust is annoying. Got to the point where I called the police and just told them and they said they would look into it. Didnt expect anything to happen.
But interestingly haven’t heard that pile of crap bombing up and down my road the last few weeks.
Where I live there is a young fella, just recently got himself a normal golf but he’s had it wrapped with a great big yellow stripes in the middle of the car. Looks kinda nice I guess, not my cup of tea. But this retard has somehow managed to get a pop and bang map on his car and it sounds horrendous.
During the day I don’t mind it but **** sakes in the middle of the night when me and the missus are trying to sleep and this idiot is bombing it up and down our road with his crappy sounding exhaust is annoying. Got to the point where I called the police and just told them and they said they would look into it. Didnt expect anything to happen.
But interestingly haven’t heard that pile of crap bombing up and down my road the last few weeks.
Caporegime
What time of night are we talking, Victor?
Well, it's obviously because it makes the girls at mcdonalds look and get impressed by the racecar sounds that an Astra 1.2 turbo can make. Dripping in clunge, as it were.
Testing:
***an acronym I know that I shouldn't be posting***
Interesting... No idea what thats meant to mean... What about:
BMW 525 ***an acronym I know that I shouldn't be posting***
Oh, old diesel BMW's don't exist anymore according to OcUK.
Paging @Gibbo whats this ill thought out nonsense please?
Is it something to do with Trumpton?
Same reason snow flakes got filtered essentially
Soldato
The vast majority of OEM ECU mapping on fuel injected cars prior to 1993/4-ish left the injector duty cycle at around 1% when the engine was on overrun, regardless of how sporty the car was (2L Escort/Astra or a Nissan R32GTR - all did the same), but it gave some nice "burble" or pops and bangs to turbo cars especially.
From 1993/4-ish until recently OEM mapping for fuel injected cars would drop that injector duty cycle to 0% for better fuel economy and emissions which meant no pops and bangs until the revs dropped to around 2k RPM when the 1% duty would be re-applied to prevent stalling. After-market ECU remapping can change all of this so "modern" mapped cars could (if requested) be made to pop and bang but very few "mainstream" sports cars did with the OEM map. However around the last 9-10 years or so, some OEM mapping on the more sporty cars has started to re-introduce this 1% injector duty cycle to recreate the pops and bangs, with Audi (I think) kicking starting it with the 2011 RS3 followed by BMW quickly afterwards.
Other than using fuel specifically just for noise it serves no purpose currently.
My R34GTT could be made to burble on overrun very easily, just the tiniest press of the accelerator and I could see my Inj Duty rise from 0% to 1% on my aftermarket ECU display (Apexi PowerFC Hand Commander) followed by pops/bangs and burbles/flames.
From 1993/4-ish until recently OEM mapping for fuel injected cars would drop that injector duty cycle to 0% for better fuel economy and emissions which meant no pops and bangs until the revs dropped to around 2k RPM when the 1% duty would be re-applied to prevent stalling. After-market ECU remapping can change all of this so "modern" mapped cars could (if requested) be made to pop and bang but very few "mainstream" sports cars did with the OEM map. However around the last 9-10 years or so, some OEM mapping on the more sporty cars has started to re-introduce this 1% injector duty cycle to recreate the pops and bangs, with Audi (I think) kicking starting it with the 2011 RS3 followed by BMW quickly afterwards.
Other than using fuel specifically just for noise it serves no purpose currently.
My R34GTT could be made to burble on overrun very easily, just the tiniest press of the accelerator and I could see my Inj Duty rise from 0% to 1% on my aftermarket ECU display (Apexi PowerFC Hand Commander) followed by pops/bangs and burbles/flames.
Caporegime
11pm onwards. Why do you think it’s acceptable to be popping and banging at that time when people are sleeping???
On modern cars you shouldn't hear it. The cat and backbox etc should muffle it all. On modern Audis and BMWs etc it's all fake.
You still get some popping on mid-engined cars but it isn't a constant and a harsh, loud noise like the fake ones. It might do it once or twice and rumble a bit (unless you remove the cat, then they spit flames)
You still get some popping on mid-engined cars but it isn't a constant and a harsh, loud noise like the fake ones. It might do it once or twice and rumble a bit (unless you remove the cat, then they spit flames)
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I've had a couple of cars that made a racket one was using bike carbs, the other was an RS turbo on MFI.
Always did my best to drive quiet at night, which on the RS was avoiding boost. On the bike carbs just keeping the revs low and smooth. It was sudden acceleration and fast let off that made the noise.
Always did my best to drive quiet at night, which on the RS was avoiding boost. On the bike carbs just keeping the revs low and smooth. It was sudden acceleration and fast let off that made the noise.
Caporegime
No, but I also don't think calling the police is a rational thing to do. Especially when you should have known they would do absolutely nothing about it.
He probably doesn't realise he is being a nuisance. The sensible and adult thing to do would be to go and talk to him about it, politely, and go from there...
Yeah I do the same, low revs, shallow throttle inputs. But ultimately I just try and avoid being out late in a noisy car.
I had a straight pipe V8 for about a week before I decided it was a stupid idea, because I had to put it in neutral to go past police, and I had to park a street away from my house...
I'm sure this new forum must have better controls than just automatic word substition? A blanket filter on "T D S" is ridiculous given that it is an acronym which means a hundred different things in a hundered different industries and contexts.
Soldato
Surely the bangs will do damage after a while?
I think someone round my way has just had there car mapped to pop and bang. Driving around the area doing it just to anny people late at night.
Sounds stupid to me, same as dump valves a good few years back
I think someone round my way has just had there car mapped to pop and bang. Driving around the area doing it just to anny people late at night.
Sounds stupid to me, same as dump valves a good few years back
Caporegime
Probably not in any measurable way, no.
Spark cut launch control and rev limiter like I have on my V70R has potential to do damage to the turbo etc. after a while though. But I can choose whether to do it or not, and I rarely do.
I need to take it to a car meet somewhen though, because there is always some idiot sitting there revving his engine and having little pops out of the exhaust... It would be awesome to start my car up and fill the night with flames and the sound of machine-gun fire, then turn it off again. See if they get the hint...
Caporegime
Could cause damage to the cat yeah but you would probably need to have pretty aggressive pops and bangs to do that. The usual little spits and farts you get from a hot hatch probably wont do much.
The OEM setup likely won't. But the people who map a car to do it for hours after they let off the throttle probably will.
This happens:
(40 seconds)
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Soldato
Yeah probably not noticable damage but the extra heat and pressure can't be good long term?
I'm not an expert. But doesn't the flow of the exhaust gases have an effect on the BHP too? surely that's interrupted too?
Caporegime
It only happens on the over-run, i.e when you aren't accelerating, so it makes no difference.
Soldato
Ah, right..... Didn't think of it that way. Still annoying when the local drug dealers drive around doing it all day everyday. Hahaha. Wouldn't mind a go of some of there cars tbh