I wonder if it's because they don't have a catalytic converter, or just can't get as much air intake as a moving car to complete combustion. Looks like they simulated driving, and not just idling for the car test.
Sadly the link with the methodology in that article is dead.
two stroke engines do that so i'm not surprised.
I do like the idea of strapping a turbine to your car's exhaust to create air movement down an attached tube for yardwork.
deleted by creator
I wonder if it's because they don't have a catalytic converter, or just can't get as much air intake as a moving car to complete combustion. Looks like they simulated driving, and not just idling for the car test.
Sadly the link with the methodology in that article is dead.
deleted by creator