EURO STANDARDS emission testing with catless header - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

tato.valverde · 05-22-2015, 11:13 AM

Hello, I want to change the exhaust header for a catless header (Nameless Performance). For specific reasons, I only have to comply with the Euro Standard laws, not with the ones specific to our cars. Those would be:

- The volume of CO (carbon monoxide) cannot be over 0.2% of the total output gas volume both in idle and when accelerating at 2500rpm.
- The Lambda coefficient (according to Brettscheider’s formula) must be in the following range: 0.97<Lambda>1.03 when accelerating at 2500rpm.

Does any of you know if having only the second cat would be enough to pass those tests?

Any experiences, testing results or numbers will be greatly appreciated!!

Pkush · 05-22-2015, 11:28 AM

Europeans love making everything difficult..

tato.valverde · 05-22-2015, 12:35 PM

Quote:

Originally Posted by Pkush

Europeans love making everything difficult..

Indeed... car life here is waaaaaay easier

05-22-2015, 11:13 AM	#1
tato.valverde Senior Member Join Date: Oct 2014 Drives: Scion FRS RS1.0,Mazda MX-6 2.5i 4WS Location: Chicago, IL / Madrid, Spain Posts: 170 Thanks: 260 Thanked 110 Times in 48 Posts Mentioned: 4 Post(s) Tagged: 1 Thread(s)	EURO STANDARDS emission testing with catless header Hello, I want to change the exhaust header for a catless header (Nameless Performance). For specific reasons, I only have to comply with the Euro Standard laws, not with the ones specific to our cars. Those would be: - The volume of CO (carbon monoxide) cannot be over 0.2% of the total output gas volume both in idle and when accelerating at 2500rpm. - The Lambda coefficient (according to Brettscheider’s formula) must be in the following range: 0.97<Lambda>1.03 when accelerating at 2500rpm. Does any of you know if having only the second cat would be enough to pass those tests? Any experiences, testing results or numbers will be greatly appreciated!!

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