It's fake because it's deliberately mapped in. Just like pops and bangs the OP is moaning about.
The ECU deliberately sends extra unburnt fuel into the exhaust to get the effect. It is entirely cosmetic on road cars.
Exhaust banging on modified cars - whats the point?
- Thread starter shifty_uk
- Start date
It's fake because it's deliberately mapped in. Just like pops and bangs the OP is moaning about.
The ECU deliberately sends extra unburnt fuel into the exhaust to get the effect. It is entirely cosmetic on road cars.
Caporegime
Mine hasn’t been mapped to burble, it massively predates that kind of stuff!
No, it hasn’t.
Dump valves do actually serve a purpose on a road car too, although I'll admit, a recirc valve would do the same job and make relatively little noise.
Yes it has, by Audi.
My M240i also does it. I'm not deluded enough to think it's not fake. It's why it can largely be switched off on demand by changing away from Sport(+) mode without affecting performance.
Soldato
- Joined
- 16 Aug 2009
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Hooliganism. Thats the point. How they get away with it is beyond me.
Caporegime
Who wants pops and bangs when you can have BOOMS.
Have to agree. The guy doesn't know his arse from his elbow and seems to think he should have an opinion on other peoples cars.
He asks some mind bendingly stupid questions at times...
"So its a V8 is it?" -obvious really loud V8 noises-
Have to agree. The guy doesn't know his arse from his elbow and seems to think he should have an opinion on other peoples cars.
He asks some mind bendingly stupid questions at times...
"So its a V8 is it?" -obvious really loud V8 noises-
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Caporegime
No, it hasn’t. No manufacturer was playing this game in 2004. The noises this car makes are a byproduct of the engine, intake and exhaust, not software.
A burble on overrun happens because extra fuel is injected into cylinder. Guess who decides if that happens or not. There is practically no reason to do this other than for the side effects.
Caporegime
Just gonna hop in here and say that my 1990 E30 325i pops and burbles on the overrun under certain conditions.
That absolutely was not "mapped in" by BMW in the 1980's. It only has a very basic computer and primitive fuel injection.
Caporegime
Alternatively it happens as a byproduct of forcing the car into overrun after being heavy on the throttle. This happens on carburettors as well as electronic fuel injection.
Even when not deliberate it can happen in some conditions. But if you can do it on demand driving at 20mph, there is only one reason it is happening.
There's OEM, there's upgraded and then there's VAG turbo diesel sounding like it's on its way out
Caporegime
Ohhh, you mean that stupid 'woooooooo' noise modded TDs make? Yeah, I don't like that either!
Edit... WTF. I'm not going to edit that. Apparently 'T D s' is a sweary?
Caporegime
For the record I can pretty consistently make the car do it, but it’s certainly not at 20mph, nor is it simply a case of letting off the throttle regardless of what was happening beforehand.
Caporegime
Testing:
TDs
Interesting... No idea what thats meant to mean... What about:
BMW 525 TDS
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?
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Soldato
Not really true still. Both my E30 and my Mk2 Golf (standard engines) would pop on overrun, nothing to do with maps or anything like that and as @paradigm can do with his Audi, I could make them pop pretty consistently if I so wished (which was rare).
E: Modern cars (last couple of years) do have it mapped in my the manufacturer and plenty of people think it's "cool" so have it mapped in to their cars also. But for most cars over 10 years (maybe even over 5) it's usually possible to make it happen but not something that has been put into the car.
Caporegime
I doubt it, have you seen the things people drive over in the Motors section? We are doing our part to accelerate it!
Just geeeeently bump the ball of your foot on the accelerator periodically during the overrun, amirite?
But there is no performance purpose for it (at least which I've heard given). If BMW wanted I'm sure they could prevent it from happening.
I guess we're gonna get stuck on semantics here, on what deliberate means.
Also just seeing Acme's post above, I guess if you are deliberately pressing the gas pedal on overrun without the fuel getting burnt then that is more about what the driver is doing.