Crackle & Pop

[ronk]

Why does the 35is crackle and pop?
it won't do incognito fast will it?

 

[sunnydays]

Why does the 35is crackle and pop?
it won't do incognito fast will it?

They took the guys that made "Rice Crispies" from the Kellogs team and said to them they want the "Snap, Crackle and Pop" sound for the exhaust,

Lol on a serious note i dont know but it sounds fantastic!

 

[Maniac]

35i/iS are programmed to make the noise. You'll note more noise in sport than comfort mode due to such programming.

 

[ronk]

I suspect that it must bleed air or air and fuel into the system ?

 

[Nictrix]

On some motorbikes there is a device that lets air into the exhaust system to help cut down on emissions. This also creates popping and crackling on the way down the revs as a by-product.
It used to be on mine but I removed it when I had the bike tuned as it can mess up the fuelling readings and also adds unwanted weight.

 

[lordgrover]

Heavy air?

 

[buzyg]

For the same reason the ///M does. It has a wicked streak. :evil:

 

[R.E92]

The air that gets pumped into the exhaust is secondary air injection.

Our cars keep injecting fuel on overrun, this combined with ignition retardation during shifts is what causes the pops and bangs.
Most others cars cut fuel injection during overrun.

 

[ronk]

Apart from being theatrical, does it have any benefit? Does it help keep the turbo vanes spinning for instance?

 

[R.E92]

Apart from being theatrical, does it have any benefit? Does it help keep the turbo vanes spinning for instance?

I don't think it has any anti-lag effects. The only benefit I have heard is that it provides cylinder cooling as the fuel is still washing through. That's the purpose of injecting fuel in over-run in race car applications.