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The O2 sensor is before the cat and there is no secondary sensor so unless it has some effect on the rest of the exhaust I cant think of anything it would affect other than saving me $200. |
The exhaust systems from the factory are designed to provide a certain amount of back pressure. Without it you risk burning or otherwise damaging the engine's valves.
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its a lean burn engine, its designed to naturally run hot so I doubt taking out a clogged cat will cause damage but thanks for the insight.
i havent changed the diameter of the exhaust and retained a factory muffler so the mass flow and velocity will remain pretty close the tolerances set by the conservative factory tuning of the ECU and material specs of the valves and head. There is a large amount of safety factor engineered into this motor and the entire system to begin with so I am not worried. Catalytic converters from the factory have a very low impedance on the exhaust to begin with. The VX design has the cat right at the header and when in lean burn it would toast the cat much hotter than a normal car anyway so there would be little to no flow restriction offered by a functional cat on this car. Back pressure is normally a factor of exhaust diameter size and length as designed by the factory. |
I don't know about in Pennsylvania, but here people pay about $80 for a used cat because of the precious metals the guts are made of. You may want to call a local scrap yard.
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That's where all the platinum was.
With lean burn, the VX will be a smog machine without a cat. |
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Surely you have an annual test like we do in the UK to test the car is roadworthy, which includes a very strict emissions test too?
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As far as I know California is the only state that requires "strict" emissions annual testing |
That's crazy, so all the emissions data/tests carried out on new cars are only done once when the car is new basically? I thought the US was strict on emissions and the like?
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