Quote:
Originally Posted by iveyjh
I have a 2000 Chevy Metro 1.0 3cyl. I use an Apexi Safc air fuel mixture adjuster that works with the map & TPS sensors. Google Safc/Vafc, I find mine on ebay or craigs list.
I get anywhere from 50 to 62 mpg according to how I drive. I get 52mpg at 60-65mph have got over 70 mpg on shorter legs.
You can adjust fuel ratio lean for only low load under 3000rpm or any range that you want.
I have been running this on 3 of my cars for 10 months, 2000 metro, 1998 hx 51-62mpg, 2002 Acura RSX 34-38 mpg. If you set it lean on low load it will not hurt the engine. It actually runs cooler.
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I'm curious about the Apexi SAFC 2 idea for creating lean burn in non-lean-burn engines. But online there seems to be a conflict over what sensors it reads. Some say that it uses the MAP, which would mean it functions best in open loop or near WOT. These folks argue that under light load and partial throttle the ECU will regulate AFR in closed loop, using the O2 sensor, and therefore the Apexi will not help lean the mixture. Anyone with experience know what's true here? Does the Apexi SAFC 2 read both the MAP and the O2? Just the MAP?