Help, looking for emissions experts!!! - ZR-1 Net Registry Forums

mike100 · 08-24-2011

All I did for my calibration was retain original VE and timing values below about 2200 rpm to pass the range of operation on the dynomometer for the smog check and also for reasonable catalyst lifespan during typical street cruise speeds.

accel enrichment tends to permanently enrich the mixture at whatever correction amounts/speeds you set. I turned that off at low speeds also.

lastly, the factory cats (or oem LT1 cats also) are ten times better than universal ones for actually scrubbing the pollutants.

Mine passes with ease with the right chip and factory manifolds, but it was kind of pushing it with an off the shelf tune using enrichment. Had I not had fresh cats and stock cams, I would not be surprised to see it fail.

08-24-2011	#15
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: Help, looking for emissions experts!!! All I did for my calibration was retain original VE and timing values below about 2200 rpm to pass the range of operation on the dynomometer for the smog check and also for reasonable catalyst lifespan during typical street cruise speeds. accel enrichment tends to permanently enrich the mixture at whatever correction amounts/speeds you set. I turned that off at low speeds also. lastly, the factory cats (or oem LT1 cats also) are ten times better than universal ones for actually scrubbing the pollutants. Mine passes with ease with the right chip and factory manifolds, but it was kind of pushing it with an off the shelf tune using enrichment. Had I not had fresh cats and stock cams, I would not be surprised to see it fail.