I noticed no one is putting down what there miles per gallon is, since this is where the saving is,
I'm running a L24 inter-cooled Turbo, running EDIS ignition (waste spark), Megasquirt II using the version 3.0 board, running the latest MS Extra firmware,
3 inch mandrel bend exhaust, with a free flowing muffler, and 7 PSI for normal driving, switchable to 10, and 15 PSI
I just came back from a trip, 290ish kilometers, I sat on between 105-115k's 80% of the way,
and I'm getting 34.34 miles per gallon, or 8.22 liters per 100k's.
I'm very happy with this, good fuel economy, and plenty of power, when I put the foot down a little.
to get it running this good, I run it lean (2500 - 3600 RPM), AFR sits between 15 and 16.5 (light cruise), EGT sits about 770ish just before the turbo.
Nigel