93 Civic HB SI, 95 Civic HB CX
Damn! Thanks for the modern small engine NOx comparisons lol.My wifes bone stock 2003 lx blows 107 ppm hc and 680ppm NOx and its on the low side of average for the gas limits, gets 26 mpg in California traffic, 10 sec 0-60 with ac on. now compare to my z6 eg, 91 ppm HC, 438 ppm NOx, 36 mpg combined and though untested i can guarantee it beats the 0-60 with ac on time, still have to fix the ac and we will find out. Just seems like a step backwards to me. Don't get me wrong, its a perfectly ok little car and has a heart of gold, my 5 foot nothing wife loves it. but as far a build... meh. OK thread jacking over, sorry.
Not sure if that is tested loaded steady state or not, or is rolling averages under real world operating conditions, but modern tractor trailers, 13-15L displacement diesel engines, fully loaded with full tanks of fuel, roughly 225 gallons, pulling 80k lbs under steady cruise at 75mph on the highway, slight incline, with a properly functioning SCR system barely touch the 200ppm range lmao.
Under a zero incline flat roll, 75mph cruise, fully loaded, they emit less than 50ppm on average.
Modern aftertreatment is amazing, a true rolling science experiment
Edit: I should mention these are readings with onboard NOx sensors, loaded dyno with a sniffer in the pipe might differ...