Quote:
Originally Posted by eco_generator
Ehh, I think there are two sides to that coin. I was able to get a universal 3" I.D. cat for my track car for under $100. 
But I guess that would be a small cat from a diesel truck perspective, lol. |
If your car is the typical and runs at a lambda of one, the universal TWCC you find at the corner store and online will be adequate. However, we are talking about cleaning up the lean burn portion of our vehicles as this is the operating regime that disallows the inclusion of lean burn for most cars designed for current emission standards. The common TWCC is utterly inadequate for this purpose.
A specialized oxidation catalyst ahead of a NOx trap would allow us to use lean burn and meet the emission standards for cleanliness. Modified drive cycles and purge circuits may also need to be included. Look up clean diesel tech and you can begin to grasp just how involved this can be. A lean burn gasoline engine parallels the emissions output of a diesel to some degree ( as a diesel runs in lean burn pretty much all the time ).