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I used to get like 20-21MPG with just some basic mods around the city. Now, I get about the same on the highway (Of course, I drive 70-85 which doesn't help. The drop in gas mileage occured after the installation of a larger turbo (With which I'm running more boost) and a bigger fuel pump. My A/F ratio reads all the way to the maximum even when boosting to 17PSI in 5th gear. Looks like I need some tuning equipment, and maybe you do too.
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