Well it already
has been figured out. We're just slipping under the radar running race cars on the street. Detroit is building higher HP engines now than ever existed in the past. Unless someone knows of a 500HP small block that was in a production car in 1969. Plus at that time a "clean" car meant it left a fairly small cloud behind it.
I'm sure many remember how impossible it seemed we'd ever see a V8 family car again. Wanna meet today's standards? OK buy a complete detroit setup. Wanna meet next year's. Uh OK, buy detroit's setup for that year.
This probably isn't the best crowd to ask for emmissions improvement ideas.
Personally I'm trying to figure out were I put those remote controlled exhaust dumps I had.
