EFI progress - economy

After a few months of tweaking and one laptop being stolen from my passenger seat I finally am getting to where I originally envisaged as far as fuel economy using Megasquirt on my 2500 daily hack.

The theft of the laptop had one silver lining, I had to recalibate the Wideband sensor to get the correct file onto the new laptop and found that I had incorrectly calibrated it first time round which was causing richer than desirable mixtures.

Using Autotune I quickly got most map points about 15% leaner and instantly the engine felt crisper and torquier. Economy has markedly improved too from 25-26 to 28-29mpg on my daily commute

Not sure what it will do on a run but I worked out this 28.5mpg is from ~ 250miles commuting a week averaging ~30mph and at least 240 sets of traffic light per tankful - at least half of them red!! I would expect +35mpg easy on a long run.

Just need to get to a dyno now for a final tweak and torque curve - probably early April