How Exhaust Pop & Crackle Tunes Actually Work

FOLLOW A MAINTENANCE PROGRAM

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SEARCH FOR A TRUSTED MECHANIC

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CHECK THE AIR PRESSURE IN YOUR TIRES

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REVIEW YOUR SUSPENSION FREQUENTLY

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SERVICE YOUR VEHICLE AS REGULARLY AS POSIBLE

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CONCLUSION

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How Exactly Does a Crackle Map Work?

Pop & Bang, burble or crackle tunes achieve these sounds through delaying the retarding of fuel injection after TDC (Top Dead Centre) into the engine. This essentially means that excess fuel is injected into the combustion chamber for a short period of time after letting off the throttle. The ignition (spark) timing is then altered to combust the unburnt fuel during the exhaust stroke instead of the compression stroke, when the exhaust valves are opened, resulting in the pops and burbles you hear exiting out your exhaust system. In order to tune this type of map to your vehicle, it is essential you have your catalytic converter removed as the pops slowly damages the internal structure of the catalytic converter. This results in an exhaust blockage which may end up doing severe damage to your engine and turbos, hence why it is essential to have this component removed from the exhaust system before tuning the vehicle.

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How Does This Affect Fuel Economy & Reliability

Running a crackle tune on your vehicle will typically reduce fuel economy by 10-15% depending on your vehicle, which may seem small, however adds up quickly over time. In terms of reliability, this type of remap does not generally cause any issues when done moderately, however, it is still not considered good or healthy for your engine by any means. By altering fuel injection and ignition timing like this, excessive wear to your exhaust valves and turbo charger may result when running an aggressive pop & bang tune as these components are now directly affected by the vibrations, sound and heat from the pops. In addition to this, unburnt fuel may seep through the cylinder rings overtime and thin the viscosity of the engine oil, resulting in insufficiently lubricated engine components and possible oil leaks.

Are They Really Worth Mapping to your Vehicle

There is no denying the great feeling you get when you hear the loud crackles exit your exhaust when letting off the throttle, however, it is also important to consider the overall health of your vehicle when doing this type of remap. Many also choose to have it removed after a few months of installing it simply because they get bored of the constant barrage of popping, unwanted excess fuel consumption and issues with emissions compliancy due to their vehicle's catalytic converter removal. Regardless, they still remain to be a very popular tune and many continue to get them installed.