Buying an EFIE

[cugir321]

Now, should I respond to this like Mike did?

Originally Posted by Sludgy

I never looked at EFIEs before seeing this string. The basic idea is a good one, causing the engine to run leaner by altering the O2 sensor signal.

I know that the manufacturer states that it will not improve mileage without other engine mods, but leaning out an engine always increases efficiency, in two ways: More air is brough into the engine at a constant fuleing rate, lowering vacuum/throttle losses; and excess oxygen improves combustion efficiency, releasing heat that is otherwise locked up in exhaust CO, HC and H2 from a stoichiometric A/F mix. (It comes at the expense of NOx emissions, however. Three way catalysts need HC and CO to reduce NOx.)

You guys should stop feuding, the guy is making a worthwhile product nobody else does.