What are burbles?
Burbles is our version of "pops and bangs", a seemingly popular modification in which fuel is injected after the combustion process so that unburnt fuel is ignited during deceleration by the exhaust stream, causing lots of little explosions in the exhaust after the turbo. The sound mimics that of an anti-lag system that keeps the turbo spooled to prevent turbo lag. Here's a video of one of our customers with our turbo system and showing off the sound of his custom catback exhaust and the burbles in sport are able to be heard as well. ---> Golf R burbles in sport
How is it activated?
In order for this to work, a few things need to be lined up.
- • You need to have a warmed-up vehicle with all oils and coolants at operating temps. (FYI, if the ECU thinks the exhaust gas temps are too high it will not allow it as a safety feature)
- • You need to have the vehicle in the mode in which you chose burbles to be in (sport, normal, or if both it doesn't matter)
- • Any time you turn off the car and restart it, the car is in normal mode by default even if it says Sport or Race in the drive mode on the screen. If you have burbles in sport mode only, you'll need to cycle out of sport/race mode and then back into sport/race again.
- • Finally, you need to have enough load on the vehicle in order to introduce some unburned fuel into the exhaust stream during deceleration (take your foot off the accelerator while in boost, for instance). With these variables above, you should hear plenty of burbles/bangs/pops/etc. Try ensuring your foot is heavy on the throttle and past 3500rpms and then release the throttle.
Do the burbles pop while in Park/Neutral?
In order for the car to have burbles in park/neutral while free revving it, is to have it in both normal and sport mode where it is on all the time.
Are there any negatives to having burbles/pops?
Other than disturbing the public :P, depending on how sensitive someone is, in certain situations you may feel or notice RPM behavior ever so briefly fluctuate while in the mode you have burbles active in the tune during gear changes. The drivability quirk is just a byproduct of the extra injection of the fuel in the cylinder after combustion. Also fuel mileage is decreased of course with wasting extra bits of fuel after the combustion process.
What if I have a stage 1 stock downpipe/cat? Are burbles safe?
Our burbles are not super aggressive and some cars even have them active from the factory. That being said, the risks are still there to clog your OEM cat and cause damage. Also, stock downpipes muffle a lot of sound so while you can still hear them the effect isn't as good as having an aftermarket downpipe. Keep this in mind. :)