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

mike100 · 08-23-2011

high nox will be due to high combustion temps/engine lugging and loading...too high initial ign timing , high compression, running lean due to vac leak etc.

The C02 should be higher- this is a by product of a proper fuel mix and a healthy Catalyst.- like 14%-15% of the total exhaust output. i'm not sure how to convert to gm/km. seems like the C0 and Hc is too high which means you are 'hella' (to borrow some bay area vernacular) rich at low speeds.

is this test on a loaded dyno or an idle test?

08-23-2011	#10
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: Help, looking for emissions experts!!! high nox will be due to high combustion temps/engine lugging and loading...too high initial ign timing , high compression, running lean due to vac leak etc. The C02 should be higher- this is a by product of a proper fuel mix and a healthy Catalyst.- like 14%-15% of the total exhaust output. i'm not sure how to convert to gm/km. seems like the C0 and Hc is too high which means you are 'hella' (to borrow some bay area vernacular) rich at low speeds. is this test on a loaded dyno or an idle test?

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