![]() ![]() If you want Stage 2 Pop & Bang, you will need to remove the stock catalyst. The same feature means that pop & bang Stage 2 is not the best option for cars which have stock exhausts with a catalytic converter. These components outside the cylinders are not intended to ever get into touch with such high temperatures. The most devastating side effects for your engine include damage to the valves, turbine and piston heads due to the explosions which happen at very high temperatures. If your pop & bang modification is performed properly, the risks still exist, but they are definitely not that dangerous. These small explosions are what create the popping and banging noise and in some cases small flames can be seen exiting from the rear silencers.Īll of the bad sides are inherent due to the pop and bang mechanism and the most devastating ones come from modifications which are not performed properly. ![]() This results in fuel igniting during the exhaust stroke and creating small explosions within the exhaust system. The spark timing maps are then adjusted so that the fuel is ignited substantially after TDC (Top Dead Centre). When applying a pop and bang patch to an ECU we request the injectors to stay open for a short period of time after the throttle plate has closed. Normally during engine deceleration the injectors are switched off to prevent fuel from entering the combustion chamber. The feature offers no performance advantages but does offer a sportier feel and noise. Many manufacturers already implement such a feature from factory on some performance models. This feature can be programmed into the ECU on some petrol and diesel vehicles which results in a pop and bang or crackle noise coming from the exhaust system during engine deceleration. ![]()
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