ZR-1 Net Registry Forums - View Single Post - Headers , Exhaust and emisions in Colorado

mike100 · 05-19-2014

I plug my MAT back into the air horn when i go to the smog place. mostly for visual inspection, but also because I want the less aggressive timing and fueling.

Funny your NOx went up a little on your passing run. Usually engine temps, lean fuel mix, and ign timing affect that the most.

05-19-2014	#29
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Headers , Exhaust and emisions in Colorado I plug my MAT back into the air horn when i go to the smog place. mostly for visual inspection, but also because I want the less aggressive timing and fueling. Funny your NOx went up a little on your passing run. Usually engine temps, lean fuel mix, and ign timing affect that the most.