Miata Turbo Forum - Boost cars, acquire cats. - Catalytic Converter Shootout

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- - Catalytic Converter Shootout (https://www.miataturbo.net/engine-performance-56/catalytic-converter-shootout-85540/)

jacob300zx

Aug 13, 2015 06:50 PM

Catalytic Converter Shootout

Great article from 2008 was just posted.

Catalytic Converter Face-Off | Articles |

AlwaysBroken

Aug 13, 2015 07:18 PM

Interesting, it seems to basically only affect CO and idle HC.

Thinking back, I think my old honda didn't actually have a working cat. Its hydrocarbons only dropped to something semi-normal around 1100 rpms. I got through smog in CA by fiddling with my idle to find a window where the RPM and HC were both barely legal.

arghx7

Aug 16, 2015 01:37 PM

I wish they would have measured backpressure with the different cats.

Also, that kind of emission test underrepresents changes in emissions because the engine is warmed up.

Stealth97

Aug 16, 2015 07:00 PM

I was kinda hoping to see videos of somebody shooting holes in catalytic converters

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