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i've recently switch from going fast to getting better Fe and all those mods that you listed is what I am used to, but some of them might not work. The thing that I don't get is all this pumping losses stuff, for some reason I don't think the car will get better gas mileage with 50% of throttle open than 25%. If it did than you'd want to port the heads, intake, bigger duration/lift cam, big exhaust to put on the car to kill bottom end torque and raise the hp, that would require you to push the pedal to the metal just to barely move at lower rpms and would be the least of pumping losses. The thing is, I've done all those mods before and guess what, I got worse gas mileage. So in my theory I am moving the other direction, put smaller than stock exhaust, long tube headers with small primary tubes, put longer runner intake manifold or even a spacer, cai or hai ( not sure about this one yet, but I'll find out in a week or 2), smaller tb, under drive crank pulley, higher gears, higher comp ( not sure about this one yet either), and all the aero mods should give you better gas mileage. Your high end power will suffer, but your bottom end torque will increase. That's my theory and I'll continue to work on it and get good or bad results.
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