The impact of decatting will be amplified in a turbocharged car however, as the removal of a precatalytic converter would allow an increase in flow of exhaust gasses into the turbocharger. Catalytic converters work best when at high temperature, so a precat is a smaller version found higher up the exhaust system to help break down emissions at start-up when the engine is running very rich.
In a turbo exhaust system, the precat generally sits just upstream from the turbocharger, therefore a removal would derestrict that area of the exhaust. Have you changed to a sports cat or walk the tightrope of a complete decat pipe? Comment below with your thoughts on this common yet risky modification! Please confirm you agree to the use of tracking cookies as outlined in the Cookies Policy.
Sign in or register. Michael Fernie 5 years ago. Remind me later. Share Tweet Email Whatsapp. What is a catalytic converter and what does it do? The honeycomb mesh maximises the surface area for the exhaust gases to interact with. So what is a sports cat? The honeycomb structure within has disintegrated due to extremely high temperatures created by unburnt fuel. Is a decat a viable option? Here you can see a catalytic converter has been completely replaced by a straight 'decat pipe'.
Decatting will inevitably increase the volume of your exhaust system but will yield very little power increase. Video via YouTube channel robsri Due to the catalytic properties of PGMs it has been possible for legislators to mitigate the effects of exhaust pollution from increasing numbers of vehicles on our roads.
Emissions regulations have been progressively tightened to the extent that just one car sold in the s would have produced as many harmful exhaust emissions as one hundred of today's automobiles equipped with catalytic converters. As the number of cars throughout the world increases, further cuts in pollution per vehicle are needed to keep improving air quality.
Unfortunately, these precious metals also make catalytic converters a target for thieves. Catalytic converters need to work at high temperatures of up to degrees to maximise their efficiency. There are various types of catalytic converter. Diesel cars typically have special catalytic converters to cope with the specific emissions from compression ignition diesel engines.
These Diesel Oxidation Catalyst units are routinely paired with additional exhaust treatment technologies such as exhaust gas recirculation, Diesel Particulate Filters to trap soot and Selective Catalytic Reduction which uses injections of AdBlue urea solution to remove NOx. Reports suggest that the growth could be attributed to supply chain issues which have made it harder for dealers to secure replacement catalytic converters through official channels, creating a black market.
Historically, however, the greatest driver of thefts has been the overseas markets for the precious metals inside the units. Catalytic converters stolen in the UK are often illegally transported abroad and the metals recycled. While thefts of catalytic converters are still rare, there are some simple steps you can take to protect your vehicle
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