Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Reducing back pressure

California98Civic · 06-06-2018, 11:00 AM

Also agree with Stubby. We drive under part throttle because that is the most efficient. Without tuning your entire exhaust, you will not gain FE simply by reducing back pressure after a primary CAT.

And I would love to add a second CAT to my car, if I could be confident it would improve emissions. Clean these gross polluters up!

Also, I started a thread on this topic a few years ago that was meant to try and capture the consensus of the best informed on this topic, on this site: http://ecomodder.com/forum/showthrea...tml#post289125

Might be useful for you....

06-06-2018, 11:00 AM	#5 (permalink)
California98Civic Cyborg ECU Join Date: Mar 2011 Location: Coastal Southern California Posts: 6,299 Black and Green - '98 Honda Civic DX Coupe Team Honda 90 day: 66.42 mpg (US) Black and Red - '00 Nashbar Custom built eBike 90 day: 3671.43 mpg (US) Thanks: 2,373 Thanked 2,172 Times in 1,469 Posts	Also agree with Stubby. We drive under part throttle because that is the most efficient. Without tuning your entire exhaust, you will not gain FE simply by reducing back pressure after a primary CAT. And I would love to add a second CAT to my car, if I could be confident it would improve emissions. Clean these gross polluters up! Also, I started a thread on this topic a few years ago that was meant to try and capture the consensus of the best informed on this topic, on this site: http://ecomodder.com/forum/showthrea...tml#post289125 Might be useful for you.... __________________ See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.