Return of the pop and burble

[Trickycoopers]

Hi all, another quick question.
When did the exhaust 'pop and burble' return to the second generation mini. Was it in the 2011 model or when the 184bhp engine was introduced in 2010.

Thanks trick.

[karlos9191]

The MCS 2007-2010 also pops and burbles, I would have thought that the 1st gen would also but maybe someone else could confirm this.
That's one of the best features of the car for me ( when the roads are safe ) wind the windows down, accelerate and release.......pop...pop....blurrrrblblblbl :-)

[Ryanjdover]

My 07 MCS R56 burbles and pops but it depends on the fuel in use. I get pops even at low temps when using Tesco Momentum 99. Sainsburys super tends to not pop at all on mine.

Need to get a nice new exhausts to turn those cheeky pops into bangs now...


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[Trickycoopers]

Looks like I've got it all wrong! I thought the exhaust popping trait was removed for a few years (maybe 2008 to 2010). But then BMW decided to put it back. Anyone with a 2010 model prove me otherwise ?

[karlos9191]

For the 2nd generation MCS you have the 2007-2010 ( 175bhp psa group engine ) which scares old people and gives children nightmares when you release the accelerator peddle, and also the face lift 2010 to current ( 184bhp bmw engine ) which also likes to make people feel the need to wear nappies when out in town.

Fuel is definitely a factor I always use tesco momentum 99, but the best noises I've made was when I was burning the black stuff from Shell.

[Lloyd Barnes]

Popping in the exhaust is usually caused by unburnt fuel in the exhaust manifolds, causing shockwave collisions which create the noise.

You can often get it when you rebuild an engine with a more agressive cam as well the increased overlap again can cause disturbance in the exhaust with the inlet and exhaust valves open at the same time for longer.

I'm guessing in this case the engine ECU is simply set to continue fuelling slightly more on overrun, creating the rich unburnt fuel in the exhaust (as opposed to BMW changing cams?). If thats the case and you have a car without it, and want it, a remapping specialist ought to be able to dial some back in?

[Ryanjdover]

It's all in the map. I read that BMW changed the map with the 2010s and the pops disappeared.

The tuners map cars to throw a bit more in on overrun hence the increase in pops on remapped cars.

A factor is the fuel you use though


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