Quote:
Originally Posted by ConnClark
They also measure volume of gasses emitted from the tail pipe and from that plus the ratio of emissions gasses they can calculate grams per mile or grams per HP.
If it were solely based on the ratio of gasses detroit would just pump fresh air into the exhaust instead of spending a grand on a catalytic converter.
And with this info as I have stated before, any leak in your exhaust system will benefit you on your emissions test.
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If ASM and/or TSI tests (The tests Texas uses on '95 and cars like the one in question.) measured the total volume of gases emitted from the tail pipe, your point would be made, but they don't.
From the previously cited
Motor Magazine article on ASM Testing (pdf).
Quote:
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During an ASM test, only a portion of the exhaust gas is measured. To make the test fair for different-size vehicles, the limits are adjusted. During the test, the GVWR from the vehicle sticker is entered. Once this information is known, the limits automatically adjust for the test.
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And before the test is run the year, model, engine size ... are entered. Please look at the actual test results cited in the above article. The readouts are all in either PPM or %.
If you still believe I'm mistaken, feel free to cite a reference or give a link to any reputable source supporting the contention that either ASM or TSI measures total volume of gases emitted.