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Originally Posted by curtis73
Yeah.. every once in a while I go over to epa.gov and try to make sense of their garbled crap, but its not easy. The 2010 standards will be the first to call for no measurable particulates. I forget if they have a size limitation on the particulates or if its across the board. They are also calling for nearly zero measurable HC. Easy for a diesel, tough for a gas. Pretty much everything from what I understand will have to have an intercooled EGR by 2010 to keep NOx in line with the new standards but I forget what the EPA will allow. Last year at SEMA I picked up a brochure from the SAN (Sema action network) booth that listed the 2010 numbers, but that was over a year ago  When I get some free time I'll search at SAN and EPA to see what links I can come up with for you all. |
although I don't do any testing with a dyno (grams per mile) I do test often for percentages of emissions. HC has been nearly zero from gas cars for years. Not uncommon at all to see 5 PPM or less
NOx is the big question though. Again, cars have been super clean for quite some time. Even at WOT you rarely see over 40 PPM in modern cars.
As for odor, there's usually something wrong if you smell sulfur. Cars are pretty much odorless (or should be)