Originally Posted by 73Elsinore

Well the M104 passed smog barely and I do mean barely. Allowable HC is 82 ppm and the measured amount was... 82 ppm. The other four gases were waaaay below max.

Great anecdotes Duke on the bridge. I first saw that video when I took vibrations and then again in a grad-level failure analysis class. Don't you know every engine school in the country has gotten a lot of mileage out of that old movie!

I saw in an earlier post that you did your MS at Wisconsin - did ya ever go to the Superior or Waukesha plants? I took a trip to the Waukesha plant once for a couple days to observe run-in and bench testing on a couple 1000 hp 900 rpm natural-gas engines I bought to drive gas compressors here in Kalifornia. One was a lean burn and one was a clean burn, both turbocharged. Long story there! I also used to witness emission testing of large stationary IC engines and fired equipment. We used to test for NOx (and SOx) way before they ever started doing it on cars. Makes for some interesting discussions with the smog techs when you take your car in. The principles are all the same, combustion is combustion. - Pete