Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Help me understand cam timing, advancing or retarding a SOHC for mpg

MetroMPG · 07-06-2015, 03:37 PM

FYI, I changed the Firefly's cam to the XFi version (that trim was never available in Canada, so there's no emissions profile for it here) and advanced the ignition timing quite a lot and the car always passed emissions (sniffer/tailpipe gas analysis type) with flying colours.

07-06-2015, 03:37 PM	#21 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,530 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,078 Thanked 6,978 Times in 3,613 Posts	FYI, I changed the Firefly's cam to the XFi version (that trim was never available in Canada, so there's no emissions profile for it here) and advanced the ignition timing quite a lot and the car always passed emissions (sniffer/tailpipe gas analysis type) with flying colours. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget