<font face="Verdana, Arial" size="2">Originally posted by VeeTec:
A Prelude with no cat burns cleaner than a SUV, like an Expedition or Suburban.
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I don't agree. A cat on average works well enough (minus during acceleration & warmup) to remove about 90% of the NO (main cause of smog, which reacts with VOC's & sunlight) produced by a combustion engine compared to a non-cat'd car. Of course, different cars burn different quantities of gas, efficiency, etc etc...but bottom line is a cat is way better than no cat. It's been calculated that about 50% of the smog produced by vehicles is cause by less than 10% of all the cars on the road, which either have removed cats or defective ones.
Diesel vehicles are a totally different story when you talk about trucks and stuff. And then there's boat motors...
I took a Environmental chem class before...and my prof was one of the top guys at Mobil, so he talked a lot about cars and gasoline and stuff...made the class interesting
Regardless, whether you want to remove ur cat or not is up to you...i have no say in it